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authorGabriel Ravier <gabravier@gmail.com>2025-11-21 00:49:16 +0100
committerGitHub <noreply@github.com>2025-11-20 18:49:16 -0500
commiteb5dac74d6435baf85ced9158d3ff915ba8872ca (patch)
treedde94c72946ca345a8d0d908625ccceb472903a7
parenteb55fc84531c6163e6fc0cf80d0501a5166cae76 (diff)
Document N64DD data buffer (#2665)
-rw-r--r--include/n64dd.h2
-rw-r--r--src/n64dd/n64dd_data_buffer.c8
-rw-r--r--src/n64dd/z_n64dd.c2
3 files changed, 8 insertions, 4 deletions
diff --git a/include/n64dd.h b/include/n64dd.h
index f7a3f649c..97064bc35 100644
--- a/include/n64dd.h
+++ b/include/n64dd.h
@@ -155,7 +155,7 @@ extern vu8 D_80121214;
extern s32 (*D_801D2E54)(struct_801E0D18*);
-extern u8 B_801DC000[];
+extern u8 gN64DDDiskReadTemporaryBuffer[];
extern s32 D_801D2E90;
extern OSMesgQueue* B_801E0D10[2];
diff --git a/src/n64dd/n64dd_data_buffer.c b/src/n64dd/n64dd_data_buffer.c
index d4dfeb336..00a09a69b 100644
--- a/src/n64dd/n64dd_data_buffer.c
+++ b/src/n64dd/n64dd_data_buffer.c
@@ -1,4 +1,8 @@
#include "n64dd.h"
-// Buffer used for reading from the disk?
-u8 B_801DC000[0x4D10];
+/**
+ * Buffer used during the process of reading from the disk
+ * Used to directly read individual blocks from the disk before copying to the final destination.
+ * As blocks are read directly into this buffer from the disk, it should be 16-byte aligned.
+ */
+ALIGNED(16) u8 gN64DDDiskReadTemporaryBuffer[MAX_BLK_SIZE];
diff --git a/src/n64dd/z_n64dd.c b/src/n64dd/z_n64dd.c
index ea1b73249..4c896b587 100644
--- a/src/n64dd/z_n64dd.c
+++ b/src/n64dd/z_n64dd.c
@@ -36,7 +36,7 @@ typedef struct struct_801D9B90 {
s32 func_801C7A1C(struct_801E0D18* arg0);
-void* D_801D2E50 = &B_801DC000;
+void* D_801D2E50 = &gN64DDDiskReadTemporaryBuffer;
s32 (*D_801D2E54)(struct_801E0D18*) = func_801C7A1C;
struct_801D9B90 B_801D9B90;