Reorganize library code into `libs/` (#3119)

* Reorganize files into libs/{dolphin,JSystem,PowerPC_EABI_Support,revolution,TRK_MINNOW_DOLPHIN}

* Update configure.py and project.py for new libs structure

* Refactor `#include <dolphin/x.h>` -> `<x.h>`

* Remove `__REVOLUTION_SDK__` forwards from dolphin

* Fix dolphin/ references in revolution

* Wrap `#include <dolphin.h>` in `!__REVOLUTION_SDK__`

* Always build TRK against dolphin headers

* Resolve revolution SDK header resolution issues

12 files changed, 2277 insertions, 0 deletions

diff --git a/libs/JSystem/src/JHostIO/JHIComm.cpp b/libs/JSystem/src/JHostIO/JHIComm.cpp
new file mode 100644
index 0000000000..f406fb4a47
--- /dev/null
+++ b/libs/JSystem/src/JHostIO/JHIComm.cpp
@@ -0,0 +1,302 @@
+#include "JSystem/JSystem.h" // IWYU pragma: keep
+
+#include "JSystem/JHostIO/JHIComm.h"
+
+static int min(int a, int b);
+
+void JHICommBufHeader::init() {
+    mp_memBuffer->writeIO(field_0x4 + field_0x1c, 0);
+    mp_memBuffer->writeIO(field_0x4 + field_0x18, 0);
+    mp_memBuffer->writeIO(field_0x4 + field_0x14, 'IS64');
+}
+
+void JHICommBufHeader::init(JHICommonMem* buffer, u32 param_1, u32 param_2, u32 alignment) {
+    m_alignment = alignment;
+
+    if (alignment == 4) {
+        field_0x14 = 0x00;
+        field_0x18 = 0x08;
+        field_0x1c = 0x14;
+        field_0x20 = 0x18;
+        field_0x24 = 0x20;
+        field_0x2c = ~0x3;
+    } else if (alignment == 32) {
+        field_0x14 = 0x00;
+        field_0x18 = 0x20;
+        field_0x1c = 0x40;
+        field_0x20 = 0x60;
+        field_0x24 = 0x80;
+        field_0x2c = ~0x1F;
+    }
+
+    mp_memBuffer = buffer;
+    field_0x4 = field_0x2c & (param_1 + m_alignment - 1);
+
+    u32 var_r30 = field_0x2c & (param_1 + param_2);
+    m_msgBufSize = var_r30 - field_0x4 - field_0x24;
+
+    init();
+}
+
+int JHICommBufHeader::load() {
+    u32 data;
+    mp_memBuffer->readIO(field_0x4 + field_0x14, &data);
+    if (data != 'IS64') {
+        return 1;
+    }
+
+    mp_memBuffer->readIO(field_0x4 + field_0x18, &field_0xc);
+    mp_memBuffer->readIO(field_0x4 + field_0x1c, &field_0x10);
+    return 0;
+}
+
+JHICommBufReader::JHICommBufReader(u32 param_0, u32 param_1, u32 alignment) {
+    mp_memBuffer = JHICommonMem::Instance();
+    m_header.init(mp_memBuffer, param_0, param_1, alignment);
+}
+
+void JHICommBufReader::Header::updateGetAdrs() {
+    if (field_0xc != field_0x30) {
+        mp_memBuffer->writeIO(field_0x4 + field_0x18, field_0xc);
+    }
+}
+
+u32 JHICommBufReader::Header::getReadableSize() const {
+    u32 size;
+    if (field_0xc <= field_0x10) {
+        size = field_0x10 - field_0xc;
+    } else {
+        size = m_msgBufSize - (field_0xc - field_0x10);
+    }
+
+    return size;
+}
+
+int JHICommBufReader::readBegin() {
+    return m_header.load();
+}
+
+void JHICommBufReader::readEnd() {
+    m_header.updateGetAdrs();
+}
+
+int JHICommBufReader::read(void* param_0, int param_1) {
+    int sp2C = min(param_1, m_header.getReadableSize());
+    u32 sp28;
+    int var_r28 = sp2C;
+    u8* var_r30 = (u8*)param_0;
+
+    int sp24;
+    if (var_r28 > 0 && (sp24 = m_header.getContSize()) > 0) {
+        int sp20 = min(var_r28, 4 - sp24);
+        m_header.alignGetAdrs();
+
+        mp_memBuffer->readIO(m_header.getGetAdrs(), &sp28);
+        
+        int sp1C = sp24;
+        int sp18 = sp24 + sp20;
+        for (; sp1C < sp18; sp1C++) {
+            *var_r30 = sp28 >> ((3 - sp1C) * 8);
+            var_r30++;
+        }
+
+        var_r28 -= sp20;
+        m_header.addGetAdrs(sp24 + sp20);
+    }
+
+    while (var_r28 >= 4) {
+        mp_memBuffer->readIO(m_header.getGetAdrs(), &sp28);
+        var_r30[0] = sp28 >> 0x18;
+        var_r30[1] = sp28 >> 0x10;
+        var_r30[2] = sp28 >> 0x08;
+        var_r30[3] = sp28 >> 0x00;
+
+        var_r30 += 4;
+        var_r28 -= 4;
+
+        m_header.addGetAdrs(4);
+    }
+
+    if (var_r28 > 0) {
+        int sp14 = var_r28;
+        mp_memBuffer->readIO(m_header.getGetAdrs(), &sp28);
+
+        for (int i = 0; i < sp14; i++) {
+            *var_r30 = sp28 >> ((3 - i) * 8);
+            var_r30++;
+        }
+
+        var_r28 -= sp14;
+        m_header.addGetAdrs(sp14);
+    }
+
+    return sp2C;
+}
+
+void JHICommBufReader::Header::addGetAdrs(int param_0) {
+    field_0xc += param_0;
+    if (field_0xc >= m_msgBufSize) {
+        field_0xc -= m_msgBufSize;
+    }
+}
+
+u32 JHICommBufReader::Header::getGetAdrs() const {
+    return field_0xc + (field_0x4 + field_0x24);
+}
+
+void JHICommBufReader::Header::alignGetAdrs() {
+    field_0xc &= ~0x3;
+}
+
+int JHICommBufReader::Header::getContSize() {
+    return field_0xc & 3;
+}
+
+static int min(int a, int b) {
+    return a < b ? a : b;
+}
+
+JHICommBufWriter::JHICommBufWriter(u32 param_0, u32 param_1, u32 param_2) {
+    mp_memBuffer = JHICommonMem::Instance();
+    m_header.init(mp_memBuffer, param_0, param_1, param_2);
+}
+
+int JHICommBufWriter::Header::load() {
+    int var_r29 = JHICommBufHeader::load();
+    if (var_r29 == 0) {
+        field_0x34 = field_0x10;
+
+        if (getRemSize() > 0) {
+            u32 sp8;
+            mp_memBuffer->readIO(field_0x4 + field_0x20, &sp8);
+
+            field_0x30 = sp8 >> 0x18;
+            field_0x31 = sp8 >> 0x10;
+            field_0x32 = sp8 >> 0x08;
+            field_0x33 = sp8 >> 0x00;
+        }
+    }
+
+    return var_r29;
+}
+
+int JHICommBufWriter::Header::getRemSize() {
+    return field_0x10 & 3;
+}
+
+void JHICommBufWriter::Header::updatePutAdrs() {
+    if (field_0x10 != field_0x34) {
+        mp_memBuffer->writeIO(field_0x4 + field_0x1c, field_0x10);
+
+        if (getRemSize() > 0) {
+            mp_memBuffer->writeIO(field_0x4 + field_0x20,
+                               (field_0x30 << 0x18) |
+                                    (field_0x31 << 0x10) |
+                                    (field_0x32 << 0x08) |
+                                    (field_0x33 << 0x00));
+        }
+    }
+}
+
+u32 JHICommBufWriter::Header::getWritebleSize() const {
+    u32 var_r31 = field_0xc & ~0x3;
+    u32 var_r30;
+
+    if (field_0x10 < var_r31) {
+        var_r30 = var_r31 - field_0x10;
+    } else {
+        var_r30 = var_r31 + (m_msgBufSize - field_0x10);
+    }
+
+    return var_r30 - 4;
+}
+
+int JHICommBufWriter::writeBegin() {
+    int var_r31;
+    if (m_header.load() != 0) {
+        var_r31 = -1;
+    } else {
+        var_r31 = m_header.getWritebleSize();
+    }
+
+    return var_r31;
+}
+
+void JHICommBufWriter::writeEnd() {
+    m_header.updatePutAdrs();
+}
+
+int JHICommBufWriter::write(void* param_0, int param_1) {
+    int sp28 = min(param_1, m_header.getWritebleSize());
+    int var_r27 = sp28;
+    u8* var_r29 = (u8*)param_0;
+    u8* var_r30 = &m_header.field_0x30;
+
+    int sp24;
+    if (var_r27 > 0 && (sp24 = m_header.getRemSize()) > 0) {
+        int sp20 = min(4 - sp24, var_r27);
+        
+        int sp1C = sp24;
+        int sp18 = sp24 + sp20;
+        for (; sp1C < sp18; sp1C++) {
+            var_r30[sp1C] = *var_r29++;
+        }
+
+        var_r27 -= sp20;
+        m_header.alignPutAdrs();
+
+        mp_memBuffer->writeIO(m_header.getPutAdrs(),
+                            (var_r30[0] << 0x18) |
+                            (var_r30[1] << 0x10) |
+                            (var_r30[2] << 0x08) |
+                            (var_r30[3] << 0x00));
+        m_header.addPutAdrs(sp24 + sp20);
+    }
+
+    while (var_r27 >= 4) {
+        mp_memBuffer->writeIO(m_header.getPutAdrs(),
+                            (var_r29[0] << 0x18) |
+                            (var_r29[1] << 0x10) |
+                            (var_r29[2] << 0x08) |
+                            (var_r29[3] << 0x00));
+
+        var_r29 += 4;
+        var_r27 -= 4;
+
+        m_header.addPutAdrs(4);
+    }
+
+    if (var_r27 > 0) {
+        int sp14 = var_r27;
+
+        for (int i = 0; i < sp14; i++) {
+            var_r30[i] = *var_r29++;
+        }
+
+        mp_memBuffer->writeIO(m_header.getPutAdrs(),
+                            (var_r30[0] << 0x18) |
+                            (var_r30[1] << 0x10) |
+                            (var_r30[2] << 0x08) |
+                            (var_r30[3] << 0x00));
+
+        var_r27 -= sp14;
+        m_header.addPutAdrs(sp14);
+    }
+
+    return sp28;
+}
+
+void JHICommBufWriter::Header::addPutAdrs(int param_0) {
+    field_0x10 += param_0;
+    if (field_0x10 >= m_msgBufSize) {
+        field_0x10 -= m_msgBufSize;
+    }
+}
+
+u32 JHICommBufWriter::Header::getPutAdrs() const {
+    return field_0x10 + (field_0x4 + field_0x24);
+}
+
+void JHICommBufWriter::Header::alignPutAdrs() {
+    field_0x10 &= ~0x3;
+}
diff --git a/libs/JSystem/src/JHostIO/JHICommonMem.cpp b/libs/JSystem/src/JHostIO/JHICommonMem.cpp
new file mode 100644
index 0000000000..3d2f59fc49
--- /dev/null
+++ b/libs/JSystem/src/JHostIO/JHICommonMem.cpp
@@ -0,0 +1,18 @@
+#include "JSystem/JSystem.h" // IWYU pragma: keep
+
+#include "JSystem/JHostIO/JHICommonMem.h"
+
+JHIMemBuf* JHICommonMem::instance;
+
+JHIMemBuf* JHICommonMem::Instance() {
+    if (instance == NULL) {
+        instance = new JHIMemBuf();
+    }
+
+    return instance;
+}
+
+JHIMemBuf::JHIMemBuf() {
+    mp_buffer = NULL;
+    create();
+}
diff --git a/libs/JSystem/src/JHostIO/JHIMccBuf.cpp b/libs/JSystem/src/JHostIO/JHIMccBuf.cpp
new file mode 100644
index 0000000000..f013947e26
--- /dev/null
+++ b/libs/JSystem/src/JHostIO/JHIMccBuf.cpp
@@ -0,0 +1,458 @@
+#include "JSystem/JSystem.h" // IWYU pragma: keep
+
+#include "JSystem/JHostIO/JHIMccBuf.h"
+#include "JSystem/JKernel/JKRHeap.h"
+#include "JSystem/JHostIO/JHIRMcc.h"
+#include <revolution/hio2.h>
+#include <cstring>
+
+void JHIReport(const char* fmt, ...) {}
+
+void JHIHalt(const char* fmt, ...) {}
+
+u8* JHIMccBuf::mTempBuf;
+u16 JHIMccBuf::mRefCount;
+
+JHIMccBuf::JHIMccBuf(u16 channel, u16 param_1, u32 param_2) {
+    initInstance(channel, param_1, param_2);
+    mRefCount++;
+}
+
+void JHIMccBuf::initInstance(u16 channel, u16 param_1, u32 param_2) {
+    mTag = 'MCHI';
+    field_0x8 = 0x20;
+    field_0xa = 0x40;
+    field_0xc = 0x60;
+    mChannel = channel;
+    field_0x10 = param_1;
+    field_0x20 = param_2;
+    mReadOffset = 0;
+    mWriteOffset = (int)(param_1 << 13) / 4;
+    field_0x1c = ((int)(param_1 << 13) / 4) - field_0xc;
+    mPortEnabled = false;
+}
+
+void JHIMccBuf::init() {
+    if (mTempBuf != NULL) {
+        initBuf();
+    } else {
+        mTempBuf = new (32) u8[0x18000];
+        if (mTempBuf == NULL) {
+            JHIHalt("ERROR: JHIMccBuf cannot alloc temp buf.\n");
+        } else {
+            JHIReport("DEBUG: JHIMccBuf alloc at %08x.\n", mTempBuf);
+        }
+
+        initBuf();
+    }
+}
+
+void JHIMccBuf::initBuf() {
+    setHeaderToBuf(mTag, 0, 0x20);
+    setHeaderToBuf(field_0xc, field_0x8, 0x20);
+    setHeaderToBuf(field_0xc, field_0xa, 0x20);
+
+    if (JHIMCCWrite(mChannel, mReadOffset, mTempBuf, 0x60)) {
+        JHIReport("DEBUG: Write to Channel:%d , Offset:%05x , Size: %d\n", mChannel, mReadOffset, 0x60);
+        
+        if (JHIMCCWrite(mChannel, mWriteOffset, mTempBuf, 0x60)) {
+            JHIReport("DEBUG: Write to Channel:%d , Offset:%05x , Size: %d\n", mChannel, mWriteOffset, 0x60);
+        }
+    }
+}
+
+JHIMccBuf::~JHIMccBuf() {
+    mRefCount--;
+    if (mRefCount == 0) {
+        delete[] mTempBuf; 
+    }
+}
+
+void JHIMccBuf::setHeaderToBuf(u32 data, u32 position, u16 size) {
+    u8* ptr = mTempBuf + position;
+    ptr[0] = (data >> 0x18) & 0xFF;
+    ptr[1] = (data >> 0x10) & 0xFF;
+    ptr[2] = (data >> 0x08) & 0xFF;
+    ptr[3] = (data >> 0x00) & 0xFF;
+
+    for (int i = 4; i < size; i++) {
+        ptr[i] = 0;
+    }
+}
+
+// NONMATCHING - storing var_r28 to stack instead of register
+u32 JHIMccBuf::setDataToBuf(void* pData, u16 size) {
+    u8* temp_buf = mTempBuf;
+    u32 i;
+    u8* data_buf = (u8*)pData;
+
+    temp_buf[0] = (mTag >> 0x18) & 0xFF;
+    temp_buf[1] = (mTag >> 0x10) & 0xFF;
+    temp_buf[2] = (mTag >> 0x08) & 0xFF;
+    temp_buf[3] = (mTag >> 0x00) & 0xFF;
+    temp_buf[4] = (size >> 0x8) & 0xFF;
+    temp_buf[5] = size & 0xFF;
+
+    for (i = 0; i < size; i++) {
+        temp_buf[6 + i] = data_buf[i];
+    }
+
+    u32 var_r28 = (size + 0x25) & ~0x1F;
+    for (i = size + 6; i < var_r28; i++) {
+        temp_buf[i] = 0;
+    }
+
+    return var_r28;
+}
+
+int JHIMccBuf::readData(u32 position, u32* pOutData) {
+    u8* temp_buf = mTempBuf;
+    u32 var_r30 = position;
+
+    if (!JHIMCCRead(mChannel, var_r30, temp_buf, 0x20)) {
+        return 0;
+    }
+
+    *pOutData = (temp_buf[0 + (position - var_r30)] << 0x18) |
+               (temp_buf[1 + (position - var_r30)] << 0x10) |
+               (temp_buf[2 + (position - var_r30)] << 0x08) |
+               (temp_buf[3 + (position - var_r30)] << 0x00);
+    return 1;
+}
+
+int JHIMccBuf::readDataFromBuf(void* pBuf, u32 size) {
+    u8* temp_buf = mTempBuf;
+    u8* u_buf = (u8*)pBuf;
+
+    u32 var_r28;
+    u32 var_r27 = 0;
+    u32 var_r26 = 0;
+    u32 var_r30 = 0;
+    while (var_r30 < size) {
+        u32 sp10 = (temp_buf[0 + var_r30] << 0x18) |
+                   (temp_buf[1 + var_r30] << 0x10) |
+                   (temp_buf[2 + var_r30] << 0x08) |
+                   (temp_buf[3 + var_r30] << 0x00);
+        if (sp10 != mTag) {
+            return 0;
+        }
+
+        var_r26 = (temp_buf[4 + var_r30] << 0x8) |
+                  (temp_buf[5 + var_r30] << 0x0);
+        if (u_buf != NULL) {
+            for (var_r28 = 0; var_r28 < var_r26; var_r28++) {
+                u_buf[var_r27 + var_r28] = temp_buf[6 + (var_r30 + var_r28)];
+            }
+        }
+
+        var_r30 += (var_r26 + 0x25) & ~0x1F;
+        var_r27 += var_r26;
+        var_r26 = 0;
+    }
+
+    return var_r27;
+}
+
+int JHIMccBuf::JHIRead(u32 channel, u32 offset, void* buffer, u32 size) {
+    JHIReport("DEBUG:      MCCRead(%d, %06x, %08x, %d);\n", channel, offset, buffer, size);
+
+    if (!isPort()) {
+        memset(buffer, 0, size);
+        return 0;
+    }
+
+    int attempts = 0;
+    DCInvalidateRange(buffer, size);
+
+    if (offset & 3) {
+        disablePort();
+        return 0;
+    }
+
+    if (offset > (field_0x1c + field_0xc) * 2) {
+        OS_REPORT("ERROR: Illegal offset specified Error. -HIOWrite()\n");
+        OS_REPORT("ERROR: offset: %08x low:%08x high:%08x\n", offset, 0, (field_0x1c + field_0xc) * 2);
+        disablePort();
+        return 0;
+    }
+
+#if VERSION < VERSION_SHIELD_DEBUG
+    while (HIORead(offset + field_0x20, buffer, size) == 0 && attempts < 30) {
+        attempts++;
+    }
+#else
+    while (HIO2Read(JHIGetHIO2Handle(), offset + field_0x20, buffer, size) == 0 && attempts < 30) {
+        attempts++;
+    }
+#endif
+
+    if (attempts >= 30) {
+        OS_REPORT("ERROR: Communication Error. -HIORead()\n");
+        memset(buffer, 0, size);
+        disablePort();
+        return 0;
+    }
+
+    return 1;
+}
+
+int JHIMccBuf::JHIWrite(u32 channel, u32 offset, void* buffer, u32 size) {
+    JHIReport("DEBUG:      MCCWrite(%d, %06x, %08x, %d);\n", channel, offset, buffer, size);
+
+    if (!isPort()) {
+        return 0;
+    }
+
+    int attempts = 0;
+    DCFlushRange(buffer, size);
+
+    if (offset & 3) {
+        disablePort();
+        return 0;
+    }
+
+    if (offset > (field_0x1c + field_0xc) * 2) {
+        OS_REPORT("ERROR: Illegal offset specified Error. -HIOWrite()\n");
+        OS_REPORT("ERROR: offset: %08x low:%08x high:%08x\n", offset, 0, (field_0x1c + field_0xc) * 2);
+        disablePort();
+        return 0;
+    }
+
+#if VERSION < VERSION_SHIELD_DEBUG
+    while (HIOWrite(offset + field_0x20, buffer, size) == 0 && attempts < 30) {
+        attempts++;
+    }
+#else
+    while (HIO2Write(JHIGetHIO2Handle(), offset + field_0x20, buffer, size) == 0 && attempts < 30) {
+        attempts++;
+    }
+#endif
+
+    if (attempts >= 30) {
+        JHIReport("ERROR: Communication Error. -HIOWrite()\n");
+        disablePort();
+        return 0;
+    }
+
+    return 1;
+}
+
+int JHIMccBuf::JHIMCCRead(u32 channel, u32 offset, void* buffer, u32 size) {
+    JHIReport("DEBUG:      JHIMCCRead(%d, %06x, %08x, %d);\n", channel, offset, buffer, size);
+    if (!JHIRead(channel, offset, buffer, size)) {
+        return 0;
+    }
+
+    return 1;
+}
+
+int JHIMccBuf::JHIMCCWrite(u32 channel, u32 offset, void* buffer, u32 size) {
+    JHIReport("DEBUG:      JHIMCCWrite(%d, %06x, %08x, %d);\n", channel, offset, buffer, size);
+    if (!JHIWrite(channel, offset, buffer, size)) {
+        return 0;
+    }
+
+    return 1;
+}
+
+JHIMccBufReader::JHIMccBufReader(u16 channel, u16 param_1, u32 param_2)
+    : JHIMccBuf(channel, param_1, param_2) {}
+
+JHIMccBufReader::~JHIMccBufReader() {}
+
+u32 JHIMccBufReader::available() {
+    u32 var_r30 = 0;
+
+    if (!isPort()) {
+        return 0;
+    }
+
+    if (!readData(mReadOffset + field_0x8, &mBeginPos)) {
+        return 0;
+    }
+
+    if (!readData(mReadOffset + field_0xa, &mEndPos)) {
+        return 0;
+    }
+
+    if (mBeginPos < mEndPos) {
+        var_r30 = mEndPos - mBeginPos;
+    } else if (mBeginPos > mEndPos) {
+        var_r30 = field_0x1c - (mBeginPos - mEndPos);
+    }
+
+    return var_r30;
+}
+
+int JHIMccBufReader::readBegin() {
+    if (!isPort()) {
+        return 0;
+    }
+
+    if (!readData(mReadOffset + field_0x8, &mBeginPos)) {
+        return 0;
+    }
+
+    if (!readData(mReadOffset + field_0xa, &mEndPos)) {
+        return 0;
+    }
+
+    JHIReport("DEBUG: readBegin: R:%08x W:%08x\n", mBeginPos, mEndPos);
+    return 1;
+}
+
+int JHIMccBufReader::read(void* pBuf) {
+    if (!isPort()) {
+        return 0;
+    }
+
+    u32 size;
+    int var_r28 = 0;
+
+    if (mBeginPos < mEndPos) {
+        size = mEndPos - mBeginPos;
+        if (!JHIMCCRead(mChannel, mReadOffset + mBeginPos, mTempBuf, size)) {
+            return 0;
+        }
+        
+        var_r28 = readDataFromBuf(pBuf, size);
+    } else if (mBeginPos > mEndPos) {
+        size = field_0x1c - (mBeginPos - mEndPos);
+        u32 var_r25 = (field_0xc + field_0x1c);
+        u32 var_r27 = var_r25 - mBeginPos;
+        u32 var_r26 = size - var_r27;
+
+        if (!JHIMCCRead(mChannel, mReadOffset + mBeginPos, mTempBuf, var_r27)) {
+            return 0;
+        } else if (var_r26 != 0) {
+            if (!JHIMCCRead(mChannel, mReadOffset + field_0xc, mTempBuf + var_r27, var_r26)) {
+                return 0;
+            }
+        }
+
+        var_r28 = readDataFromBuf(pBuf, size);
+    }
+
+    return var_r28;
+}
+
+void JHIMccBufReader::readEnd() {
+    if (isPort()) {
+        setHeaderToBuf(mEndPos, 0, 0x20);
+
+        JHIReport("DEBUG: readEnd: Point:%08x\n", mEndPos);
+        
+        if (!JHIMCCWrite(mChannel, mReadOffset + field_0x8, mTempBuf, 0x20)) {
+            return;
+        }
+    }
+}
+
+JHIMccBufWriter::JHIMccBufWriter(u16 channel, u16 param_1, u32 param_2)
+    : JHIMccBuf(channel, param_1, param_2) {}
+
+JHIMccBufWriter::~JHIMccBufWriter() {}
+
+int JHIMccBufWriter::writeBegin() {
+    int var_r29 = 0;
+
+    if (!isPort()) {
+        return 0;
+    }
+
+    if (!readData(mWriteOffset + field_0x8, &mBeginPos)) {
+        return 0;
+    }
+
+    if (!readData(mWriteOffset + field_0xa, &mEndPos)) {
+        return 0;
+    }
+
+    u32 var_r30;
+    if (mBeginPos == field_0xc) {
+        var_r30 = field_0x1c + field_0xc;
+        var_r30 -= 0x20;
+    } else {
+        var_r30 = mBeginPos - 0x20;
+    }
+
+    if (mEndPos > var_r30) {
+        var_r29 = (field_0x1c - (mEndPos - var_r30)) - 0x20;
+    } else if (mEndPos < var_r30) {
+        var_r29 = (var_r30 - mEndPos) - 0x20;
+    }
+
+    JHIReport("DEBUG: writeBegin: R:%08x W:%08x\n", mBeginPos, mEndPos);
+    return var_r29;
+}
+
+int JHIMccBufWriter::write(void* pBuffer, u32 size) {
+    if (!isPort()) {
+        return 0;
+    }
+
+    u32 var_r26;
+    u32 var_r27;
+    u32 var_r28;
+
+    // Probably fake match
+    var_r28 = var_r28;
+
+    u32 var_r29 = setDataToBuf(pBuffer, size);
+    if (mBeginPos == field_0xc) {
+        var_r27 = field_0x1c + field_0xc;
+        var_r27 -= 0x20;
+    } else {
+        var_r27 = mBeginPos - 0x20;
+    }
+
+    if (mEndPos > var_r27) {
+        int x;
+        var_r26 = field_0x1c - (mEndPos - var_r27);
+        var_r28 = (field_0x1c + field_0xc) - mEndPos;
+
+        if (var_r28 >= var_r29) {
+            if (!JHIMCCWrite(mChannel, mWriteOffset + mEndPos, mTempBuf, var_r29)) {
+                return 0;
+            }
+
+            mEndPos += var_r29;
+        } else {
+            if (!JHIMCCWrite(mChannel, mWriteOffset + mEndPos, mTempBuf, var_r28)) {
+                return 0;
+            } else if (var_r29 - var_r28 != 0) {
+                if (!JHIMCCWrite(mChannel, mWriteOffset + field_0xc, mTempBuf + var_r28, var_r29 - var_r28)) {
+                    return 0;
+                }
+            }
+
+            mEndPos = field_0xc + (var_r29 - var_r28);
+        }
+    } else if (mEndPos < var_r27) {
+        var_r26 = var_r27 - mEndPos;
+
+        if (!JHIMCCWrite(mChannel, mWriteOffset + mEndPos, mTempBuf, var_r29)) {
+            return 0;
+        }
+
+        mEndPos += var_r29;
+    }
+
+    if (mEndPos == field_0xc + field_0x1c) {
+        mEndPos = field_0xc;
+    }
+
+    return var_r29;
+}
+
+void JHIMccBufWriter::writeEnd() {
+    if (isPort()) {
+        setHeaderToBuf(mEndPos, 0, 0x20);
+
+        JHIReport("DEBUG: writeEnd: Point:%08x\n", mEndPos);
+        
+        if (!JHIMCCWrite(mChannel, mWriteOffset + field_0xa, mTempBuf, 0x20)) {
+            return;
+        }
+    }
+}
diff --git a/libs/JSystem/src/JHostIO/JHIMemBuf.cpp b/libs/JSystem/src/JHostIO/JHIMemBuf.cpp
new file mode 100644
index 0000000000..4fec9ad532
--- /dev/null
+++ b/libs/JSystem/src/JHostIO/JHIMemBuf.cpp
@@ -0,0 +1,75 @@
+#include "JSystem/JSystem.h" // IWYU pragma: keep
+
+#include "JSystem/JHostIO/JHICommonMem.h"
+#include "JSystem/JKernel/JKRHeap.h"
+#ifdef __REVOLUTION_SDK__
+#include <revolution.h>
+#else
+#include <dolphin.h>
+#endif
+
+int JHIMemBuf::create() {
+    int rt = 1;
+    if (mp_buffer == NULL) {
+        mp_buffer = new (32) u8[0x20000];
+
+        if (mp_buffer == NULL) {
+            rt = 0;
+            OS_REPORT("ERROR: hioSync Alloc Mem NG!\n");
+        } else {
+            OS_REPORT("INFO: hioSync Alloc Mem OK! %08x\n", mp_buffer);
+        }
+    }
+
+    return rt;
+}
+
+int JHIMemBuf::open() {
+    return 1;
+}
+
+void JHIMemBuf::close() {
+    if (mp_buffer != NULL) {
+        delete[] mp_buffer;
+    }
+}
+
+JHIMemBuf::~JHIMemBuf() {
+    close();
+}
+
+u8* JHIMemBuf::getPointer() const {
+    return mp_buffer;
+}
+
+u32 JHIMemBuf::readIO(u32 position) const {
+    u32 data;
+    readIO(position, &data);
+    return data;
+}
+
+void JHIMemBuf::readIO(u32 position, u32* out_data) const {
+    u8* read_ptr = getPointer() + position;
+    *out_data = (read_ptr[0] << 0x18) |
+                (read_ptr[1] << 0x10) |
+                (read_ptr[2] << 0x08) |
+                (read_ptr[3] << 0x00);
+}
+
+void JHIMemBuf::writeIO(u32 position, u8* src_data, u32 length) const {
+    u8* write_ptr = getPointer() + position;
+
+    while (--length != 0) {
+        *write_ptr = *src_data++;
+        write_ptr++;
+    }
+}
+
+void JHIMemBuf::writeIO(u32 position, u32 data) const {
+    u8* write_ptr = getPointer() + position;
+
+    *write_ptr++ = data >> 0x18;
+    *write_ptr++ = data >> 0x10;
+    *write_ptr++ = data >> 0x08;
+    *write_ptr++ = data >> 0x00;
+}
diff --git a/libs/JSystem/src/JHostIO/JHIRMcc.cpp b/libs/JSystem/src/JHostIO/JHIRMcc.cpp
new file mode 100644
index 0000000000..b22a19d365
--- /dev/null
+++ b/libs/JSystem/src/JHostIO/JHIRMcc.cpp
@@ -0,0 +1,123 @@
+#include "JSystem/JSystem.h" // IWYU pragma: keep
+
+#include "JSystem/JHostIO/JHIMccBuf.h"
+#include <revolution/hio2.h>
+
+HIO2DeviceType gExiDevice = HIO2_DEVICE_INVALID;
+u8 data_8074bd04 = 1;
+
+s32 ghHIO2;
+JHIMccContext tContext_old;
+JHIMccContext tContext_new;
+bool data_8074d138;
+u8 data_8074d139;
+
+BOOL JHIhio2CallbackEnum(HIO2DeviceType type) {
+    gExiDevice = type;
+    return 0;
+}
+
+void JHIhio2DisconnectCallback(s32) {
+    gExiDevice = HIO2_DEVICE_INVALID;
+}
+
+u32 JHIInitInterface() {
+    if (data_8074bd04) {
+        if (!HIO2Init()) {
+            return 0;
+        }
+
+        if (!HIO2EnumDevices(JHIhio2CallbackEnum)) {
+            return 0;
+        }
+
+        data_8074bd04 = 0;
+    }
+
+    if (gExiDevice == HIO2_DEVICE_INVALID) {
+        return 0;
+    }
+
+    if (data_8074d139 != 0) {
+        HIO2Close(ghHIO2);
+        data_8074d139 = 0;
+    }
+
+    if (data_8074d139 == 0) {
+        ghHIO2 = HIO2Open(gExiDevice, 0, JHIhio2DisconnectCallback);
+        if (ghHIO2 == -1) {
+            return 0;
+        }
+
+        data_8074d139 = 1;
+    }
+
+    return 1;
+}
+
+bool JHINegotiateInterface(u32) {
+    return 0;
+}
+
+JHIMccContext JHIGetHiSpeedContext() {
+    if (tContext_new.mp_reader == NULL) {
+        tContext_new.mp_reader = new JHIMccBufReader(1, 0x18, 0x6000);
+    }
+    
+    if (tContext_new.mp_writer == NULL) {
+        tContext_new.mp_writer = new JHIMccBufWriter(1, 0x18, 0x6000);
+    }
+
+    return tContext_new;
+}
+
+JHIMccContext JHIGetLowSpeedContext() {
+    if (tContext_old.mp_reader == NULL) {
+        tContext_old.mp_reader = new JHIMccBufReader(1, 2, 0);
+    }
+    
+    if (tContext_old.mp_writer == NULL) {
+        tContext_old.mp_writer = new JHIMccBufWriter(1, 2, 0);
+    }
+
+    return tContext_old;
+}
+
+BOOL JHIInitMCC(JHIMccContext* pCtx, bool* param_1) {
+    JHIGetHiSpeedContext();
+    JHIGetLowSpeedContext();
+
+    if (!JHIInitInterface()) {
+        *pCtx = tContext_old;
+        return FALSE;
+    }
+
+    data_8074d138 = JHINegotiateInterface(800);
+    if (data_8074d138) {
+        tContext_new.mp_reader->enablePort();
+        tContext_new.mp_writer->enablePort();
+        tContext_new.mp_reader->init();
+        tContext_new.mp_writer->init();
+    } else {
+        tContext_old.mp_reader->enablePort();
+        tContext_old.mp_writer->enablePort();
+        tContext_old.mp_reader->init();
+        tContext_old.mp_writer->init();
+    }
+
+    if (param_1 != NULL) {
+        *param_1 = data_8074d138;
+    }
+
+    if (data_8074d138) {
+        *pCtx = tContext_new;
+    } else {
+        *pCtx = tContext_old;
+    }
+
+    return TRUE;
+}
+
+s32 JHIGetHIO2Handle() {
+    return ghHIO2;
+}
diff --git a/libs/JSystem/src/JHostIO/JHIhioASync.cpp b/libs/JSystem/src/JHostIO/JHIhioASync.cpp
new file mode 100644
index 0000000000..bc8c5b9e2c
--- /dev/null
+++ b/libs/JSystem/src/JHostIO/JHIhioASync.cpp
@@ -0,0 +1,174 @@
+#include "JSystem/JSystem.h" // IWYU pragma: keep
+
+#include "JSystem/JHostIO/JHIMccBuf.h"
+#include "JSystem/JHostIO/JHIRMcc.h"
+#ifdef __REVOLUTION_SDK__
+#include <revolution.h>
+#else
+#include <dolphin.h>
+#endif
+#include "global.h"
+
+u32 gsEnableHostio;
+u32 gsEnableInterface;
+u32 gsDataToRead;
+
+u8* gsReadBuf;
+u8* gsWriteBuf;
+JHICommBufReader* gsJHIrecvBuf;
+JHICommBufWriter* gsJHIsendBuf;
+
+JHIMccContext gMccContext;
+
+BOOL JHIInit(u32 enabled) {
+    gsEnableHostio = enabled;
+    gsDataToRead = 0;
+    gsEnableInterface = TRUE;
+
+    if (gsEnableHostio) {
+        OS_REPORT("INFO:********************************\n");
+        OS_REPORT("INFO: Opening Hostio service...\n");
+
+        if (!JHIInitMCC(&gMccContext, NULL)) {
+            gsEnableInterface = FALSE;
+            OS_REPORT("ERROR: Cannot Open HostIO Interface..\n");
+            OS_REPORT("INFO:  *** Disable JHostIO ***\n");
+        }
+
+        gsReadBuf = new (32) u8[0xC000];
+        gsWriteBuf = new (32) u8[0xC000];
+
+        if (gsReadBuf == NULL || gsWriteBuf == NULL) {
+            gsEnableInterface = FALSE;
+            OS_REPORT("ERROR: Cannot alloc transport buffer..\n");
+            OS_REPORT("INFO:  *** Disable JHostIO ***\n");
+        }
+    }
+
+    return gsEnableInterface && gsEnableHostio;
+}
+
+static void dummyString() {
+    DEAD_STRING("INFO:Quitting Hostio...");
+}
+
+u32 JHIEventLoop() {
+    static u32 tNowWrite;
+    static u32 tNowRead;
+    static u8* tReadBuf;
+    static u8* tWriteBuf;
+
+    int var_r30;
+    u32 available_size;
+
+    if (gsEnableHostio && gsEnableInterface) {
+        if (tNowRead != 0) {
+            var_r30 = gsJHIsendBuf->writeBegin();
+            if (var_r30 >= tNowRead) {
+                gsJHIsendBuf->write(tReadBuf, tNowRead);
+                gsJHIsendBuf->writeEnd();
+                tNowRead = 0;
+                tReadBuf = gsReadBuf;
+            } else if (var_r30 != 0) {
+                gsJHIsendBuf->write(tReadBuf, var_r30);
+                gsJHIsendBuf->writeEnd();
+                tNowRead -= var_r30;
+                tReadBuf += var_r30;
+            }
+        } else {
+            available_size = gMccContext.mp_reader->available();
+            if (available_size != 0) {
+                JHIReport("DEBUG: Dolphin <- PC Data Available : Size:%d\n", available_size);
+                gMccContext.mp_reader->readBegin();
+
+                u32 var_r27 = gMccContext.mp_reader->read(gsReadBuf);
+                if (var_r27 != 0) {
+                    gMccContext.mp_reader->readEnd();
+                    tNowRead = 0;
+                    tReadBuf = gsReadBuf;
+
+                    u32 var_r28 = gsJHIsendBuf->writeBegin();
+                    if (var_r28 >= var_r27) {
+                        gsJHIsendBuf->write(tReadBuf, var_r27);
+                        gsJHIsendBuf->writeEnd();
+                    } else {
+                        if (var_r28 != 0) {
+                            gsJHIsendBuf->write(tReadBuf, var_r28);
+                            gsJHIsendBuf->writeEnd();
+                        }
+                        tNowRead = var_r27 - var_r28;
+                        tReadBuf = gsReadBuf + var_r28;
+                    }
+                }
+            }
+        }
+
+        if (tNowWrite != 0) {
+            var_r30 = gMccContext.mp_writer->writeBegin();
+            if (var_r30 > tNowWrite) {
+                gMccContext.mp_writer->write(tWriteBuf, tNowWrite);
+                gMccContext.mp_writer->writeEnd();
+                tNowWrite = 0;
+                tWriteBuf = gsWriteBuf;
+            } else if (var_r30 != 0) {
+                gMccContext.mp_writer->write(tWriteBuf, var_r30);
+                gMccContext.mp_writer->writeEnd();
+                tNowWrite -= var_r30;
+                tWriteBuf += var_r30;
+            }
+        } else {
+            available_size =  gsJHIrecvBuf->available();
+            if (available_size != 0) {
+                JHIReport("DEBUG: Dolphin -> PC Data Available : Size:%d\n", available_size);
+
+                u32 temp_r26 = available_size < 0xC000 ? available_size : 0xC000;
+                gsJHIrecvBuf->readBegin();
+                gsJHIrecvBuf->read(gsWriteBuf, temp_r26);
+                gsJHIrecvBuf->readEnd();
+                tNowWrite = 0;
+                tWriteBuf = gsWriteBuf;
+
+                var_r30 = gMccContext.mp_writer->writeBegin();
+                if (var_r30 > temp_r26) {
+                    gMccContext.mp_writer->write(tWriteBuf, temp_r26);
+                    gMccContext.mp_writer->writeEnd();
+                } else if (var_r30 != 0) {
+                    gMccContext.mp_writer->write(tWriteBuf, var_r30);
+                    gMccContext.mp_writer->writeEnd();
+                    tNowWrite = temp_r26 - var_r30;
+                    tWriteBuf = gsWriteBuf + var_r30;
+                }
+            }
+        }
+
+        if (!gMccContext.mp_reader->isPort() || !gMccContext.mp_writer->isPort()) {
+            gsEnableInterface = 0;
+        }
+        (void)0;
+    } else if (!gsEnableInterface && gsEnableHostio != 0 && JHIInitInterface()) {
+        OS_REPORT("INFO: JHostIO: Enabled USB2EXI Interface\n");
+        bool sp8 = JHINegotiateInterface(800);
+        if (sp8) {
+            gMccContext = JHIGetHiSpeedContext();
+        } else {
+            gMccContext = JHIGetLowSpeedContext();
+        }
+
+        gMccContext.mp_reader->enablePort();
+        gMccContext.mp_writer->enablePort();
+        gMccContext.mp_reader->init();
+        gMccContext.mp_writer->init();
+        gsEnableInterface = TRUE;
+    }
+
+    return 0;
+}
+
+BOOL JOR_CHECKINTERFACE() {
+    return (gsEnableInterface && gsEnableHostio) != 0;
+}
+
+void JHISetBuffer(JHIContext* pCtx) {
+    gsJHIrecvBuf = pCtx->mp_reader;
+    gsJHIsendBuf = pCtx->mp_writer;
+}
diff --git a/libs/JSystem/src/JHostIO/JOREntry.cpp b/libs/JSystem/src/JHostIO/JOREntry.cpp
new file mode 100644
index 0000000000..0a6b0271c3
--- /dev/null
+++ b/libs/JSystem/src/JHostIO/JOREntry.cpp
@@ -0,0 +1,24 @@
+#include "JSystem/JSystem.h" // IWYU pragma: keep
+
+#include "JSystem/JHostIO/JORServer.h"
+#include "JSystem/JHostIO/JOREntry.h"
+#include "JSystem/JHostIO/JHIhioASync.h"
+
+void JORInit() {
+    JHIInit(TRUE);
+
+    JHICommBufWriter* pComWriter = new JHICommBufWriter(0x10000, 0x10000, 4);
+    JHICommBufReader* pComReader = new JHICommBufReader(0, 0x10000, 4);
+
+    JHIContext ctx;
+    ctx.mp_reader = new JHICommBufReader(0x10000, 0x10000, 4);
+    ctx.mp_writer = new JHICommBufWriter(0, 0x10000, 4);
+
+    JHIComPortManager<JHICmnMem>* pPortMng = JHIComPortManager<JHICmnMem>::create();
+    pPortMng->getRefPort().setBuf(pComReader, pComWriter);
+    JHISetBuffer(&ctx);
+
+    JORServer* pServer = JORServer::create();
+    pPortMng->addTag(pServer);
+    pServer->sendReset();
+}
diff --git a/libs/JSystem/src/JHostIO/JORFile.cpp b/libs/JSystem/src/JHostIO/JORFile.cpp
new file mode 100644
index 0000000000..f689f06534
--- /dev/null
+++ b/libs/JSystem/src/JHostIO/JORFile.cpp
@@ -0,0 +1,189 @@
+#include "JSystem/JSystem.h" // IWYU pragma: keep
+
+#include "JSystem/JHostIO/JORFile.h"
+#include "JSystem/JHostIO/JORServer.h"
+#ifdef __REVOLUTION_SDK__
+#include <revolution.h>
+#else
+#include <dolphin.h>
+#endif
+
+JORFile::JORFile()
+: mHandle(0),
+  mFileLength(0),
+  mStatus(EStatus_WAIT),
+  mNFileName(0),
+  field_0x18(0),
+  mDataStream() {}
+
+int JORFile::countMaskSize(const char* mask) {
+    u32 var_r28 = 0;
+    u32 var_r30 = 0;
+
+    while (true) {
+        u32 var_r27 = var_r30;
+
+        while (mask[var_r30] != 0) {
+            var_r30++;
+            if (var_r30 - var_r27 > 0xFF) {
+                return 0;
+            }
+        }
+
+        var_r30++;
+        while (mask[var_r30] != 0) {
+            var_r30++;
+            if (var_r30 - var_r27 > 0xFF) {
+                return 0;
+            }
+        }
+
+        var_r30++;
+        if (mask[var_r30] == 0) {
+            return var_r30 + 1;
+        }
+
+        var_r28++;
+        if (var_r28 > 0x28) {
+            return 0;
+        }
+    }
+}
+
+void JORFile::waitMessage_() {
+    while (mStatus == EStatus_WAIT) {
+        JOR_MESSAGELOOP();
+    }
+}
+
+int JORFile::open(const char* path, u32 flags, const char* extMask, const char* defaultExt, const char* param_4, const char* fileSuffix) {
+    if (mHandle != 0) {
+        return 0;
+    }
+
+    mStatus = EStatus_WAIT;
+    mFlags = flags;
+
+    if (extMask == NULL) {
+        extMask = "";
+    }
+
+    u32 mask_size = countMaskSize(extMask);
+    JORMContext* mctx = JORServer::getInstance()->attachMCTX(MCTX_MSG_FIO);
+    mctx->openFile(this, mFlags, path, extMask, mask_size, defaultExt, param_4, fileSuffix);
+    JORServer::getInstance()->releaseMCTX(mctx);
+
+    waitMessage_();
+
+    if (mHandle == 0) {
+        return 0;
+    }
+
+    return 1;
+}
+
+void JORFile::close() {
+    JORMContext* mctx;
+    if (mHandle != 0) {
+        mStatus = EStatus_WAIT;
+        mctx = JORServer::getInstance()->attachMCTX(MCTX_MSG_FIO);
+        mctx->closeFile(this);
+        JORServer::getInstance()->releaseMCTX(mctx);
+
+        waitMessage_();
+        mHandle = 0;
+    }
+}
+
+void JORFile::readBegin_(s32 len) {
+    mStatus = EStatus_WAIT;
+    JORMContext* mctx = JORServer::getInstance()->attachMCTX(MCTX_MSG_FIO);
+    mctx->readBegin(this, len);
+    JORServer::getInstance()->releaseMCTX(mctx);
+
+    waitMessage_();
+}
+
+void JORFile::readLoop_() {
+    mStatus = EStatus_WAIT;
+    JORMContext* mctx = JORServer::getInstance()->attachMCTX(MCTX_MSG_FIO);
+    mctx->readData(this);
+    JORServer::getInstance()->releaseMCTX(mctx);
+
+    waitMessage_();
+}
+
+s32 JORFile::readData(void* buffer, s32 length) {
+    if (mHandle == 0) {
+        return 0;
+    }
+
+    s32 len = length == 0 ? mFileLength : length;
+    setBuffer(buffer, len);
+    readBegin_(len);
+
+    do {
+        readLoop_();
+        if (mStatus == EStatus_READ_BEGIN) {
+            setBuffer(NULL, 0);
+            return 0;
+        }
+    } while (mStatus != EStatus_WRITE_END);
+    
+    setBuffer(NULL, 0);
+    DCFlushRange(buffer, len);
+    return len;
+}
+
+void JORFile::setBuffer(void* buffer, s32 length) {
+    mDataStream.setBuffer(buffer, length);
+}
+
+void JORFile::writeBegin_(s32 len) {
+    mStatus = EStatus_WAIT;
+    JORMContext* mctx = JORServer::getInstance()->attachMCTX(MCTX_MSG_FIO);
+    mctx->writeBegin(this, mFlags, len);
+    JORServer::getInstance()->releaseMCTX(mctx);
+
+    waitMessage_();
+}
+
+void JORFile::writeLoop_(const void* pBuffer, s32 size, u32 pos) {
+    mStatus = EStatus_WAIT;
+    JORMContext* mctx = JORServer::getInstance()->attachMCTX(MCTX_MSG_FIO);
+    mctx->writeData(this, pBuffer, size, pos);
+    JORServer::getInstance()->releaseMCTX(mctx);
+
+    waitMessage_();
+}
+
+void JORFile::writeDone_(s32 len) {
+    mStatus = EStatus_WAIT;
+    JORMContext* mctx = JORServer::getInstance()->attachMCTX(MCTX_MSG_FIO);
+    mctx->writeDone(this, len);
+    JORServer::getInstance()->releaseMCTX(mctx);
+
+    waitMessage_();
+}
+
+s32 JORFile::writeData(const void* buffer, s32 length) {
+    if (mHandle == 0) {
+        return 0;
+    }
+
+    s32 len = length == 0 ? mFileLength : length;
+    writeBegin_(len);
+
+    u32 pos = 0;
+    s32 size = 0;
+    u8* buf_start = (u8*)buffer;
+    do {
+        size = len - pos > 0xF00 ? 0xF00 : len - pos;
+        writeLoop_(buf_start + pos, size, pos);
+
+        pos += size;
+    } while (len - pos != 0);
+    
+    writeDone_(len);
+    return len;
+}
diff --git a/libs/JSystem/src/JHostIO/JORHostInfo.cpp b/libs/JSystem/src/JHostIO/JORHostInfo.cpp
new file mode 100644
index 0000000000..904cb27fbf
--- /dev/null
+++ b/libs/JSystem/src/JHostIO/JORHostInfo.cpp
@@ -0,0 +1,58 @@
+#include "JSystem/JSystem.h" // IWYU pragma: keep
+
+#include "JSystem/JHostIO/JORHostInfo.h"
+#include "JSystem/JHostIO/JORServer.h"
+
+// End of each month in standard year
+static s32 YearDays[] = {
+    0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334,
+};
+
+// End of each month in leap year
+static s32 LeapYearDays[] = {
+    0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335,
+};
+
+static BOOL IsLeapYear(int year) {
+    return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
+}
+
+BOOL JORGetYearDays(int year, int mon) {
+    s32* days = IsLeapYear(year) ? LeapYearDays : YearDays;
+    return days[mon];
+}
+
+bool JORGetHostInfo(u32 request_type, JORHostInfo* pHostinfo) {
+    JORMContext* mctx = JORServer::getInstance()->attachMCTX(MCTX_MSG_GET_HOST_INFO);
+    mctx->sendHostInfoRequest(request_type, pHostinfo);
+    JORServer::getInstance()->releaseMCTX(mctx);
+
+    while (pHostinfo->getResult() == 0) {
+        JOR_MESSAGELOOP();
+    }
+
+    return pHostinfo->getResult() == 1;
+}
+
+void JORGetComputerName(char* buffer, u32 buffer_size) {
+    JORHostInfo_String string;
+    string.setStringBuffer(buffer);
+    string.setBufferSize(buffer_size);
+
+    JORGetHostInfo(HOSTINFO_REQ_COMPUTER_NAME, &string);
+}
+
+void JORGetUserName(char* buffer, u32 buffer_size) {
+    JORHostInfo_String string;
+    string.setStringBuffer(buffer);
+    string.setBufferSize(buffer_size);
+
+    JORGetHostInfo(HOSTINFO_REQ_USERNAME, &string);
+}
+
+void JORGetLocalTime(OSCalendarTime* pCalendarTime) {
+    JORHostInfo_CalendarTime calendar_time;
+    calendar_time.setCalendarTimeBuffer(pCalendarTime);
+
+    JORGetHostInfo(HOSTINFO_REQ_LOCAL_TIME, &calendar_time);
+}
diff --git a/libs/JSystem/src/JHostIO/JORMessageBox.cpp b/libs/JSystem/src/JHostIO/JORMessageBox.cpp
new file mode 100644
index 0000000000..e7ce1cc954
--- /dev/null
+++ b/libs/JSystem/src/JHostIO/JORMessageBox.cpp
@@ -0,0 +1,16 @@
+#include "JSystem/JSystem.h" // IWYU pragma: keep
+
+#include "JSystem/JHostIO/JORServer.h"
+
+u32 JORMessageBox(const char* message, const char* title, u32 style) {
+    u32 status = 0;
+    JORMContext* mctx = JORServer::getInstance()->attachMCTX(MCTX_MSG_OPEN_MESSAGE_BOX);
+    mctx->openMessageBox(&status, style, message, title);
+    JORServer::getInstance()->releaseMCTX(mctx);
+
+    while (status == 0) {
+        JOR_MESSAGELOOP();
+    }
+
+    return status;
+}
diff --git a/libs/JSystem/src/JHostIO/JORServer.cpp b/libs/JSystem/src/JHostIO/JORServer.cpp
new file mode 100644
index 0000000000..18086d36d8
--- /dev/null
+++ b/libs/JSystem/src/JHostIO/JORServer.cpp
@@ -0,0 +1,822 @@
+#include "JSystem/JSystem.h" // IWYU pragma: keep
+
+#include "JSystem/JHostIO/JORServer.h"
+#include "JSystem/JHostIO/JORReflexible.h"
+#include "JSystem/JHostIO/JORFile.h"
+#include "JSystem/JHostIO/JORHostInfo.h"
+#include "JSystem/JSupport/JSUMemoryStream.h"
+#include <cstring>
+
+void JOREventCallbackListNode::JORAppend() {
+    JORServer* pServer = JORServer::getInstance();
+    JUT_ASSERT(51, pServer!=NULL);
+    pServer->appendEventCallbackListNode(this);
+}
+
+void JOREventCallbackListNode::JORRemove() {
+    JORServer* pServer = JORServer::getInstance();
+    JUT_ASSERT(57, pServer!=NULL);
+    pServer->removeEventCallbackListNode(this);
+}
+
+JOREventCallbackListNode::JOREventCallbackListNode(u32 param_0, u32 param_1, bool append) {
+    field_0xc = param_0;
+    field_0x10 = param_1;
+
+    if (append) {
+        JORAppend();
+    }
+}
+
+JOREventCallbackListNode::~JOREventCallbackListNode() {
+    JORRemove();
+}
+
+void JORReflexible::listen(u32 command, const JOREvent* event) {
+    switch (command) {
+    case JORServer::ECommand_GenObjInfo:
+        genObjectInfo((JORGenEvent*)event);
+        break;
+    case JORServer::ECommand_NodeEvent:
+        listenNodeEvent((JORNodeEvent*)event);
+        break;
+    case JORServer::ECommand_PropertyEvent:
+        listenPropertyEvent((JORPropertyEvent*)event);
+        break;
+    }
+}
+
+void JORReflexible::genObjectInfo(const JORGenEvent* event) {
+    JORMContext* mctx = getJORServer()->attachMCTX(MCTX_MSG_GEN_OBJ_INFO);
+    mctx->startNode("", this, 0, 0);
+    genMessage(mctx);
+    mctx->endNode();
+    getJORServer()->releaseMCTX(mctx);
+}
+
+void JORReflexible::listenNodeEvent(const JORNodeEvent*) {}
+
+void JORReflexible::listenPropertyEvent(const JORPropertyEvent* pEvent) {
+    if (pEvent->kind & JORPropertyEvent::EKind_HasListener) {
+        JORServer* pServer = getJORServer();
+
+        JORPropertyEvent* event = (JORPropertyEvent*)pEvent;
+        event->kind &= ~JORPropertyEvent::EKind_HasListener;
+
+        switch (pEvent->type) { 
+        case 'RNGf':
+        case 'RNGi':
+        case 'RBTN':
+        case 'CMBX':
+            if (pEvent->field_0x14 >= 4) {
+                pEvent->field_0x10->listenPropertyEvent(pEvent);
+            }
+            break;
+        case 'CHBX':
+            if (pEvent->field_0x14 >= 4) {
+                pEvent->field_0x10->listenPropertyEvent(pEvent);
+            }
+            break;
+        case 'EDBX':
+        case 'BUTN':
+            pEvent->field_0x10->listenPropertyEvent(pEvent);
+            break;
+        }
+
+        event->kind |= JORPropertyEvent::EKind_HasListener;
+    } else if (!(pEvent->kind & JORPropertyEvent::EKind_ValueID)) {
+        switch (pEvent->type) {
+        case 'RBTN':
+        case 'RNGi':
+        case 'RNGf':
+        case 'CMBX':
+            if (pEvent->field_0x14 >= 4) {
+                JORPropertyEvent* event = (JORPropertyEvent*)pEvent;
+                JORServer::defSetVal((void*)event->id, event->kind, event->field_0x18.U32);
+            }
+            break;
+        case 'CHBX':
+            if (pEvent->field_0x14 >= 4) {
+                JORPropertyEvent* event = (JORPropertyEvent*)pEvent;
+                JORServer::defSetBitVal((void*)event->id, event->kind, (u16)event->field_0x18.U16[0], (u16)event->field_0x18.U16[1]);
+            }
+            break;
+        case 'EDBX':
+            JORPropertyEvent* event = (JORPropertyEvent*)pEvent;
+            JSUMemoryInputStream stream(&event->field_0x18, event->field_0x14);
+            stream >> (char*)event->id;
+            break;
+        }
+        return;
+    }
+}
+
+JORServer* JORServer::instance;
+
+JORServer* JORServer::create() {
+    if (instance == NULL) {
+        instance = new JORServer();
+    }
+
+    return instance;
+}
+
+void JORServer::defSetVal(void* ptr, u32 kind, s32 val) {
+    switch (jhostio::GetEKindSize(kind)) {
+    case jhostio::EKind_8B:
+        *(u8*)ptr = val;
+        break;
+    case jhostio::EKind_16B:
+        *(u16*)ptr = val;
+        break;
+    case jhostio::EKind_32B:
+        *(u32*)ptr = val;
+        break;
+    }
+}
+
+void JORServer::defSetBitVal(void* ptr, u32 kind, u16 param_2, u16 param_3) {
+    param_2 &= param_3;
+
+    switch (jhostio::GetEKindSize(kind)) {
+    case jhostio::EKind_8B: {
+        u8* kptr = (u8*)ptr;
+        *kptr &= (u8)~param_3;
+        *kptr |= (u8)param_2;
+        break;
+    }
+    case jhostio::EKind_16B: {
+        u16* kptr = (u16*)ptr;
+        *kptr &= (u16)~param_3;
+        *kptr |= param_2;
+    }
+    }
+}
+
+JORMContext* JORServer::attachMCTX(u32 msgID) {
+    m_context.bufInit();
+    m_context.putMsgID(msgID);
+    return &m_context;
+}
+
+void JORServer::releaseMCTX(JORMContext* mctx) {
+    ASSERTMSGLINE(292, mctx->msgSize() < 0x10000, "JORServer:releaseMCTX: context buffer probably overflowed.\n");
+
+    if (mctx->msgSize() > 4) {
+        const s32 var_r28 = send(mctx->msgPtr(), mctx->msgSize());
+    }
+}
+
+void JORServer::receive(const char* pBuffer, s32 length) {
+    JSUMemoryInputStream stream(pBuffer, length);
+
+    u32 command;
+    stream >> command;
+
+    if (!stream.isGood()) {
+        OS_REPORT("JORServer::receive : データが足りない\n");
+        OS_REPORT("JORServer::receive : データが足りない\n");
+        return;
+    }
+
+    switch (command) {
+    case ECommand_GetRootObj:
+        if (mp_rootObj != NULL) {
+            OS_REPORT("Get RootObject ref(%08X)\n", mp_rootObj);
+            m_context.bufInit();
+            m_context.putMsgID(MCTX_MSG_GET_ROOT_OBJ);
+            m_context.genRootNode(m_rootName, mp_rootObj, field_0x10064, field_0x10068);
+            send(m_context.msgPtr(), m_context.msgSize());
+        }
+        break;
+    case ECommand_NodeEvent: {
+        u32 obj_addr;
+        stream.read(obj_addr);
+        JORNodeEvent* pEvent = (JORNodeEvent*)(pBuffer + stream.getPosition());
+        stream.skip(4);
+
+        if (stream.isGood()) {
+            reinterpret_cast<JORReflexible*>(obj_addr)->listen(command, pEvent);
+        }
+    }
+    break;
+    case ECommand_PropertyEvent: {
+        u32 obj_addr;
+        stream.read(obj_addr);
+        JORPropertyEvent* pEvent = (JORPropertyEvent*)(pBuffer + stream.getPosition());
+        stream.skip(0x18);
+
+        if (stream.isGood()) {
+            stream.skip(pEvent->field_0x14);
+        }
+
+        if (stream.isGood()) {
+            reinterpret_cast<JORReflexible*>(obj_addr)->listen(command, pEvent);
+        }
+    }
+    break;
+    case ECommand_GenObjInfo: {
+        u32 obj_addr;
+        stream.read(obj_addr);
+
+        if (stream.isGood()) {
+            reinterpret_cast<JORReflexible*>(obj_addr)->listen(command, NULL);
+        }
+    }
+    break;
+    case ECommand_FIO:
+        fio_dispatchMessage_(stream);
+        break;
+    case ECommand_DIR:
+        dir_dispatchMessage_(stream);
+        break;
+    case ECommand_ReadResultS32:
+        readResultS32_(stream);
+        break;
+    case ECommand_HostInfo:
+        hostinfo_dispatchMessage_(stream);
+        break;
+    case ECommand_ReadResultU32:
+        readResultU32_(stream);
+        break;
+    case ECommand_ReadOrEvent:
+        readOrEvent_(stream);
+        break;
+    }
+}
+
+void JORServer::fio_openFile_(JSUMemoryInputStream& stream) {
+    u32 file_addr;
+    stream >> file_addr;
+    JORFile* file = (JORFile*)file_addr;
+
+    u32 handle;
+    stream >> handle;
+
+    u32 file_len;
+    stream >> file_len;
+
+    u16 filename_len;
+    u16 basename_len;
+    u16 extension_name_len;
+    stream >> filename_len >> basename_len >> extension_name_len;
+
+    strncpy(file->getFilename(), (const char*)stream.getPointer(), filename_len);
+    file->getFilename()[filename_len] = 0;
+
+    file->setHandle(handle);
+    file->setFileLength(file_len);
+    file->setNFileName((u16)filename_len);
+    file->setNBaseName((u16)basename_len);
+    file->setNExtensionName((u16)extension_name_len);
+    file->setStatus(JORFile::EStatus_READ_DATA);
+}
+
+void JORServer::fio_closeFile_(JSUMemoryInputStream& stream) {
+    u32 file_addr;
+    stream >> file_addr;
+    JORFile* file = (JORFile*)file_addr;
+
+    u32 sp8;
+    stream >> sp8;
+
+    if (sp8 == 0) {
+        OS_REPORT("Close Failed!\n");
+    }
+
+    file->setStatus(JORFile::EStatus_READ_END);
+}
+
+void JORServer::fio_readData_(JSUMemoryInputStream& stream) {
+    u32 file_addr;
+    stream >> file_addr;
+    JORFile* file = (JORFile*)file_addr;
+
+    u32 status;
+    stream >> status;
+
+    if (status == JORFile::EStatus_READ_BEGIN) {
+        file->setStatus(status);
+    } else if (status == JORFile::EStatus_WRITE_BEGIN) {
+        file->setStatus(status);
+    } else if (status == JORFile::EStatus_WRITE_DATA) {
+        u32 position, data;
+        stream >> position >> data;
+        file->getDataStream().seek(position, JSUStreamSeekFrom_SET);
+
+        file->getDataStream().write(stream.getPointer(), data);
+        file->setStatus(status);
+    } else if (status == JORFile::EStatus_WRITE_END) {
+        file->setStatus(status);
+    }
+}
+
+void JORServer::fio_writeData_(JSUMemoryInputStream& stream) {
+    u32 file_addr;
+    stream >> file_addr;
+    JORFile* file = (JORFile*)file_addr;
+
+    u32 status;
+    stream >> status;
+
+    file->setStatus(status);
+}
+
+void JORServer::fio_dispatchMessage_(JSUMemoryInputStream& stream) {
+    u32 command;
+    stream >> command;
+
+    switch (command) {
+    case JORFile::ECommand_OPEN:
+        fio_openFile_(stream);
+        break;
+    case JORFile::ECommand_CLOSE:
+        fio_closeFile_(stream);
+        break;
+    case JORFile::ECommand_READ:
+        fio_readData_(stream);
+        break;
+    case JORFile::ECommand_WRITE:
+        fio_writeData_(stream);
+        break;
+    }
+}
+
+void JORServer::dir_dispatchMessage_(JSUMemoryInputStream& stream) {
+    u32 command, status, dir_addr;
+    stream >> command >> dir_addr >> status;
+
+    JORDir* dir = (JORDir*)dir_addr;
+    dir->setStatus(status);
+
+    if (status != 2) {
+        switch (command) {
+        case 1:
+            break;
+        case 2:
+            dir_findFirstFile_(stream, dir);
+            break;
+        case 3:
+            dir_findNextFile_(stream, dir);
+            break;
+        case 0:
+            dir_browseForFolder_(stream, dir);
+            break;
+        case 5:
+            dir_browseForFolder_(stream, dir);
+            break;
+        }
+    }
+}
+
+void JORServer::dir_findFirstFile_(JSUMemoryInputStream& stream, JORDir* directory) {
+    char namebuf[256];
+    u32 attribute, lo_time, hi_time, handle;
+    stream >> handle >> attribute >> lo_time >> hi_time >> namebuf;
+
+    directory->setFindHandle(handle);
+    directory->setFileAttribute(attribute);
+    directory->setLowDateTime(lo_time);
+    directory->setHighDateTime(hi_time);
+    strncpy(directory->getFilename(), namebuf, sizeof(namebuf) - 1);
+}
+
+void JORServer::dir_findNextFile_(JSUMemoryInputStream& stream, JORDir* directory) {
+    char namebuf[256];
+    u32 attribute, lo_time, hi_time;
+    stream >> attribute >> lo_time >> hi_time >> namebuf;
+
+    directory->setFileAttribute(attribute);
+    directory->setLowDateTime(lo_time);
+    directory->setHighDateTime(hi_time);
+    strncpy(directory->getFilename(), namebuf, sizeof(namebuf) - 1);
+}
+
+void JORServer::dir_browseForFolder_(JSUMemoryInputStream& stream, JORDir* directory) {
+    char namebuf[256];
+    u32 attribute, lo_time, hi_time;
+    stream >> attribute >> lo_time >> hi_time >> namebuf;
+
+    directory->setFileAttribute(attribute);
+    directory->setLowDateTime(lo_time);
+    directory->setHighDateTime(hi_time);
+    strncpy(directory->getFilename(), namebuf, sizeof(namebuf) - 1);
+}
+
+void JORServer::hostinfo_dispatchMessage_(JSUMemoryInputStream& stream) {
+    u32 command, spC, hostinfo_addr;
+    stream >> command >> hostinfo_addr >> spC;
+
+    JORHostInfo* hostinfo = (JORHostInfo*)hostinfo_addr;
+    hostinfo->setResult(spC != 0 ? 1 : 2);
+
+    if (spC != 0) {
+        switch (command) {
+        case HOSTINFO_REQ_COMPUTER_NAME:
+            hostinfo_recvString_(stream, (JORHostInfo_String*)hostinfo);
+            break;
+        case HOSTINFO_REQ_USERNAME:
+            hostinfo_recvString_(stream, (JORHostInfo_String*)hostinfo);
+            break;
+        case HOSTINFO_REQ_LOCAL_TIME:
+            hostinfo_localTime_(stream, (JORHostInfo_CalendarTime*)hostinfo);
+            break;
+        }
+    }
+}
+
+void JORServer::hostinfo_recvString_(JSUMemoryInputStream& stream, JORHostInfo_String* pString) {
+    char buffer[256];
+    stream >> buffer;
+    strncpy(pString->getString(), buffer, pString->getBufferSize());
+}
+
+void JORServer::hostinfo_localTime_(JSUMemoryInputStream& stream, JORHostInfo_CalendarTime* pCalendarTime) {
+    u16 year, month, weekday, monthday, hours, minutes, seconds, milliseconds;
+    stream >> year
+           >> month
+           >> weekday
+           >> monthday
+           >> hours
+           >> minutes
+           >> seconds
+           >> milliseconds;
+
+    OSCalendarTime* pTime = pCalendarTime->getCalendarTime();
+    pTime->sec = seconds;
+    pTime->min = minutes;
+    pTime->hour = hours;
+    pTime->mday = monthday;
+    pTime->mon = month - 1;
+    pTime->year = year;
+    pTime->wday = weekday;
+    pTime->msec = milliseconds;
+    pTime->usec = 0;
+    pTime->yday = monthday + JORGetYearDays(year, month - 1);
+}
+
+void JORServer::sendReset() {
+    u32 spC = JHIhtonl(0);
+    send(&spC, 4);
+}
+
+void JORServer::setRootNode(const char* name, JORReflexible* node, u32 param_2, u32 param_3) {
+    mp_rootObj = node;
+    if (name == NULL) {
+        name = "ルート";
+    }
+
+    strncpy(m_rootName, name, sizeof(m_rootName) - 1);
+    m_rootName[sizeof(m_rootName) - 1] = 0;
+    field_0x10064 = param_2;
+    field_0x10068 = param_3;
+}
+
+void JORServer::readResultU32_(JSUMemoryInputStream& stream) {
+    u32 ptr_addr, val;
+    stream >> ptr_addr >> val;
+
+    u32* ptr = (u32*)ptr_addr;
+    *ptr = val;
+}
+
+void JORServer::readResultS32_(JSUMemoryInputStream& stream) {
+    u32 ptr_addr, val;
+    stream >> ptr_addr >> val;
+
+    s32* ptr = (s32*)ptr_addr;
+    *ptr = val;
+}
+
+void JORServer::readOrEvent_(JSUMemoryInputStream& stream) {
+    if (m_eventDone) {
+        stream >> m_eventNum;
+
+        u16 name_len;
+        stream >> name_len;
+        if (name_len >= 0x1000) {
+            name_len = 0x1000 - 1;
+        }
+
+        stream.read(m_eventName, name_len);
+        m_eventName[name_len] = 0;
+        m_event = true;
+    }
+}
+
+void JORServer::doneEvent() {
+    if (!m_eventDone) {
+        m_eventDone = true;
+
+        u32 sp8 = JHIhtonl(0x10);
+        send(&sp8, 4);
+    }
+}
+
+void JORMContext::genNodeSub(const char* name, JORReflexible* node, u32 param_2, u32 param_3) {
+    mOutputStream << name;
+    putNode(node);
+
+    mOutputStream << param_2;
+
+    if (param_2 & 4) {
+        mOutputStream << param_3;
+    }
+}
+
+void JORMContext::endNode() {
+    mOutputStream << MCTX_COMMAND_END_NODE;
+}
+
+void JORMContext::invalidNode(JORReflexible* node, u32 param_1) {
+    mOutputStream << MCTX_COMMAND_INVALID_NODE;
+    putNode(node);
+
+    mOutputStream << param_1;
+}
+
+void JORMContext::genControl(u32 type, u32 kind, const char* label, u32 style, u32 id,
+                             JOREventListener* pListener, u32 initValue)
+{
+    mOutputStream << type << kind << label << style << id;
+
+    if (kind & JORPropertyEvent::EKind_HasListener) {
+        mOutputStream << (uintptr_t)pListener;
+    }
+
+    if ((kind & JORPropertyEvent::EKind_ValueID) && type != 'EDBX') {
+        kind |= 0x20;
+    }
+
+    if (jhostio::GetEKindSize(kind) != 0) {
+        mOutputStream << initValue;
+    }
+}
+
+void JORMContext::genSliderSub(u32 kind, const char* label, u32 id, u32 style, s32 initValue, s32 rangeMin,
+                               s32 rangeMax, JOREventListener* pListener, u16 posX, u16 posY,
+                               u16 width, u16 height)
+{
+    if (pListener != NULL) {
+        kind |= JORPropertyEvent::EKind_HasListener;
+    }
+
+    mOutputStream << MCTX_COMMAND_GEN_CONTROL;
+    genControl(kind & JORPropertyEvent::EKind_FloatValue ? 'RNGf' : 'RNGi', kind, label, style, id, pListener, initValue);
+
+    mOutputStream << rangeMin << rangeMax;
+    mOutputStream << posX << posY << width << height;
+}
+
+void JORMContext::genCheckBoxSub(u32 kind, const char* label, u32 id, u32 style, u16 initValue, u16 mask,
+                                 JOREventListener* pListener, u16 posX, u16 posY, u16 width,
+                                 u16 height)
+{
+    if (pListener != NULL) {
+        kind |= JORPropertyEvent::EKind_HasListener;
+    }
+
+    mOutputStream << MCTX_COMMAND_GEN_CONTROL;
+    genControl('CHBX', kind, label, style, id, pListener, (mask << 0x10) | initValue);
+
+    mOutputStream << posX << posY << width << height;
+}
+
+void JORMContext::startSelectorSub(u32 type, u32 kind, const char* label, u32 id, u32 style, s32 initValue,
+                                   JOREventListener* pListener, u16 posX, u16 posY, u16 width,
+                                   u16 height)
+{
+    if (pListener != NULL) {
+        kind |= JORPropertyEvent::EKind_HasListener;
+    }
+
+    mOutputStream << MCTX_COMMAND_START_SELECTOR;
+    genControl(type, kind, label, style, id, pListener, initValue);
+
+    mOutputStream << posX << posY << width << height;
+}
+
+void JORMContext::endSelectorSub() {
+    mOutputStream << MCTX_COMMAND_END_SELECTOR;
+}
+
+void JORMContext::genSelectorItemSub(const char* label, s32 itemNo, u32 param_2, u16 posX,
+                                     u16 posY, u16 width, u16 height)
+{
+    mOutputStream << MCTX_COMMAND_SELECTOR_ITEM << label << (u32)itemNo;
+    mOutputStream << param_2 << posX << posY << width << height;
+}
+
+void JORMContext::genButton(const char* label, u32 id, u32 style, JOREventListener* pListener,
+                            u16 posX, u16 posY, u16 width, u16 height)
+{
+    u32 kind = 0;
+    if (pListener != NULL) {
+        kind |= JORPropertyEvent::EKind_HasListener;
+    }
+
+    mOutputStream << MCTX_COMMAND_GEN_CONTROL;
+    genControl('BUTN', kind, label, style, id, pListener, 0);
+
+    mOutputStream << posX << posY << width << height;
+}
+
+void JORMContext::genLabel(const char* label, u32 id, u32 style, JOREventListener* pListener,
+                           u16 posX, u16 posY, u16 width, u16 height)
+{
+    u32 kind = 0;
+    if (pListener != NULL) {
+        kind |= JORPropertyEvent::EKind_HasListener;
+    }
+
+    mOutputStream << MCTX_COMMAND_GEN_CONTROL;
+    genControl('LABL', kind, label, style, id, pListener, 0);
+
+    mOutputStream << posX << posY << width << height;
+}
+
+void JORMContext::genGroupBox(const char* label, u32 id, u32 style, JOREventListener* pListener,
+                              u16 posX, u16 posY, u16 width, u16 height)
+{
+    u32 kind = 0;
+    if (pListener != NULL) {
+        kind |= JORPropertyEvent::EKind_HasListener;
+    }
+
+    mOutputStream << MCTX_COMMAND_GEN_CONTROL;
+    genControl('GRBX', kind, label, style, id, pListener, 0);
+
+    mOutputStream << posX << posY << width << height;
+}
+
+void JORMContext::genEditBoxID(const char* label, u32 id, const char* string, u16 length, u32 style,
+                               JOREventListener* pListener, u16 posX, u16 posY, u16 width, u16 height)
+{
+    u32 kind = 0;
+    if (pListener != NULL) {
+        kind |= JORPropertyEvent::EKind_HasListener;
+    }
+
+    mOutputStream << MCTX_COMMAND_GEN_CONTROL;
+    genControl('EDBX', kind | JORPropertyEvent::EKind_ValueID, label, style, id, pListener, 0);
+
+    mOutputStream << length << string;
+    mOutputStream << posX << posY << width << height;
+}
+
+void JORMContext::updateControl(u32 mode, u32 id, u32 param_2) {
+    mOutputStream << MCTX_COMMAND_UPDATE_CONTROL << mode << id;
+
+    if (mode & 1) {
+        mOutputStream << param_2;
+    }
+}
+
+void JORMContext::updateControl(u32 mode, u32 id, const char* param_2) {
+    if (mode & 2) {
+        mOutputStream << MCTX_COMMAND_UPDATE_CONTROL << mode << id << param_2;
+    }
+}
+
+void JORMContext::updateSliderSub(u32 mode, u32 id, s32 value, s32 rangeMin, s32 rangeMax, u32 param_5) {
+    updateControl(mode, id, param_5);
+
+    if (mode & 2) {
+        mOutputStream << value;
+    }
+
+    if (mode & 4) {
+        mOutputStream << rangeMin << rangeMax;
+    }
+}
+
+void JORMContext::updateCheckBoxSub(u32 mode, u32 id, u16 value, u16 mask, u32 param_4) {
+    mOutputStream << MCTX_COMMAND_UPDATE_CONTROL << (mode | JORPropertyEvent::EKind_HasListener) << id << (u32)mask;
+
+    if (mode & 1) {
+        mOutputStream << param_4;
+    }
+
+    if (mode & 2) {
+        mOutputStream << (u32)((mask << 0x10) | value);
+    }
+}
+
+void JORMContext::updateSelectorSub(u32 mode, u32 id, s32 value, u32 param_3) {
+    updateControl(mode, id, param_3);
+
+    if (mode & 2) {
+        mOutputStream << value;
+    }
+}
+
+void JORMContext::updateEditBoxID(u32 mode, u32 id, const char* string, u32 param_3, u16 length) {
+    updateControl(mode, id, param_3);
+
+    if (mode & 2) {
+        mOutputStream << string;
+    }
+
+    if (mode & 0x10) {
+        mOutputStream << length;
+    }
+}
+
+void JORMContext::editComboBoxItem(u32 param_0, u32 id, const char* param_2, s32 param_3, u32 param_4) {
+    updateControl(8, id, (u32)0);
+
+    mOutputStream << param_0 << param_4 << param_2 << param_3;
+}
+
+void JORMContext::openFile(JORFile* pFile, u32 flags, const char* path, const char* extMask,
+                           u32 maskSize, const char* defaultExt, const char* param_6, const char* fileSuffix)
+{
+    if (defaultExt != NULL) {
+        flags |= JORFile::EFlags_DEFAULT_EXT;
+    }
+
+    if (param_6 != NULL) {
+        flags |= JORFile::EFlags_UNK_0x20;
+    }
+
+    if (fileSuffix != NULL) {
+        flags |= JORFile::EFlags_HAS_SUFFIX;
+    }
+
+    mOutputStream << (u32)JORFile::ECommand_OPEN << (uintptr_t)pFile << flags << path;
+    mOutputStream << (u16)maskSize;
+    mOutputStream.write(extMask, maskSize);
+
+    if (defaultExt != NULL) {
+        mOutputStream << defaultExt;
+    }
+
+    if (param_6 != NULL) {
+        mOutputStream << param_6;
+    }
+
+    if (fileSuffix != NULL) {
+        mOutputStream << fileSuffix;
+    }
+}
+
+void JORMContext::closeFile(JORFile* pFile) {
+    mOutputStream << (u32)JORFile::ECommand_CLOSE << (uintptr_t)pFile << pFile->getHandle();
+}
+
+void JORMContext::readBegin(JORFile* pFile, s32 size) {
+    mOutputStream << (u32)JORFile::ECommand_READ
+                  << (u32)JORFile::EStatus_READ_BEGIN
+                  << (uintptr_t)pFile
+                  << pFile->getHandle()
+                  << (u32)size;
+}
+
+void JORMContext::readData(JORFile* pFile) {
+    mOutputStream << (u32)JORFile::ECommand_READ
+                  << (u32)JORFile::EStatus_READ_DATA
+                  << (uintptr_t)pFile
+                  << pFile->getHandle();
+}
+
+void JORMContext::writeBegin(JORFile* pFile, u16 flags, u32 size) {
+    mOutputStream << (u32)JORFile::ECommand_WRITE
+                  << (u32)JORFile::EStatus_WRITE_BEGIN
+                  << (uintptr_t)pFile
+                  << pFile->getHandle()
+                  << (u32)size
+                  << (u32)flags;
+}
+
+void JORMContext::writeData(JORFile* pFile, const void* pBuffer, s32 size, u32 position) {
+    mOutputStream << (u32)JORFile::ECommand_WRITE
+                  << (u32)JORFile::EStatus_WRITE_DATA
+                  << (uintptr_t)pFile
+                  << pFile->getHandle()
+                  << (u32)position;
+
+    mOutputStream << (u16)size;
+    mOutputStream.write(pBuffer, size);
+}
+
+void JORMContext::writeDone(JORFile* pFile, u32 size) {
+    mOutputStream << (u32)JORFile::ECommand_WRITE
+                  << (u32)JORFile::EStatus_WRITE_END
+                  << (uintptr_t)pFile
+                  << pFile->getHandle()
+                  << (u32)size;
+}
+
+void JORMContext::openMessageBox(void* param_0, u32 style, const char* message, const char* title) {
+    mOutputStream << (uintptr_t)param_0 << (u32)style << message << title;
+}
+
+void JORMContext::sendHostInfoRequest(u32 requestType, JORHostInfo* pHostInfo) {
+    mOutputStream << requestType << (uintptr_t)pHostInfo;
+}
+
+void JORMContext::sendShellExecuteRequest(void* param_0, const char* param_1, const char* param_2,
+                                          const char* param_3, const char* param_4, int param_5)
+{
+    mOutputStream << (uintptr_t)param_0 << param_1 << param_2 << param_3 << param_4 << (u32)param_5;
+}
diff --git a/libs/JSystem/src/JHostIO/JORShellExecute.cpp b/libs/JSystem/src/JHostIO/JORShellExecute.cpp
new file mode 100644
index 0000000000..107c978e49
--- /dev/null
+++ b/libs/JSystem/src/JHostIO/JORShellExecute.cpp
@@ -0,0 +1,18 @@
+#include "JSystem/JSystem.h" // IWYU pragma: keep
+
+#include "JSystem/JHostIO/JORServer.h"
+
+int JORShellExecute(const char* param_0, const char* param_1, const char* param_2, const char* param_3, int param_4) {
+    int rt = 0;
+    JORServer* instance = JORServer::getInstance();
+    
+    JORMContext* mctx = instance->attachMCTX(MCTX_MSG_SHELL_EXEC);
+    mctx->sendShellExecuteRequest(&rt, param_0, param_1, param_2, param_3, param_4);
+    instance->releaseMCTX(mctx);
+
+    while (rt == 0) {
+        JOR_MESSAGELOOP();
+    }
+
+    return rt;
+}