1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
#include "ultra64.h"
void __osViSwapContext(void) {
register OSViMode* viMode;
register __OSViContext* viNext;
u32 origin;
u32 hStart;
u32 vstart;
u32 sp34;
u32 field;
field = 0;
viNext = __osViNext;
viMode = viNext->modep;
field = IO_READ(VI_V_CURRENT_LINE_REG) & 1;
origin = osVirtualToPhysical(viNext->buffer) + viMode->fldRegs[field].origin;
if (viNext->state & VI_STATE_XSCALE_UPDATED) {
viNext->x.scale |= viMode->comRegs.xScale & ~0xFFF;
} else {
viNext->x.scale = viMode->comRegs.xScale;
}
if (viNext->state & 4) {
sp34 = (u32)(viMode->fldRegs[field].yScale & 0xFFF);
viNext->y.scale = viNext->y.factor * sp34;
viNext->y.scale |= viMode->fldRegs[field].yScale & ~0xFFF;
} else {
viNext->y.scale = viMode->fldRegs[field].yScale;
}
vstart = (viMode->fldRegs[field].vStart - (__additional_scanline << 0x10)) + __additional_scanline;
hStart = viMode->comRegs.hStart;
if (viNext->state & 0x20) {
hStart = 0;
}
if (viNext->state & 0x40) {
viNext->y.scale = 0;
origin = osVirtualToPhysical(viNext->buffer);
}
if (viNext->state & 0x80) {
viNext->y.scale = (viNext->y.offset << 0x10) & 0x3FF0000;
origin = osVirtualToPhysical(viNext->buffer);
}
IO_WRITE(VI_ORIGIN_REG, origin);
IO_WRITE(VI_WIDTH_REG, viMode->comRegs.width);
IO_WRITE(VI_BURST_REG, viMode->comRegs.burst);
IO_WRITE(VI_V_SYNC_REG, viMode->comRegs.vSync);
IO_WRITE(VI_H_SYNC_REG, viMode->comRegs.hSync);
IO_WRITE(VI_LEAP_REG, viMode->comRegs.leap);
IO_WRITE(VI_H_START_REG, hStart);
IO_WRITE(VI_V_START_REG, vstart);
IO_WRITE(VI_V_BURST_REG, viMode->fldRegs[field].vBurst);
IO_WRITE(VI_INTR_REG, viMode->fldRegs[field].vIntr);
IO_WRITE(VI_X_SCALE_REG, viNext->x.scale);
IO_WRITE(VI_Y_SCALE_REG, viNext->y.scale);
IO_WRITE(VI_CONTROL_REG, viNext->features);
__osViNext = __osViCurr;
__osViCurr = viNext;
*__osViNext = *__osViCurr;
}
|
