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Fixes to Trio64 read mask handling. Fixes some graphics issues in OS/2 Warp.

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This commit is contained in:
SarahW 2018-04-10 16:20:48 +01:00
commit 138430ad8f
1 changed files with 8 additions and 1 deletions
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9
src/vid_s3.c
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@ -1514,7 +1514,8 @@ uint8_t s3_accel_read(uint32_t addr, void *p)
#define READ_SRC(addr, dat) if (s3->bpp == 0) dat = svga->vram[ (addr) & s3->vram_mask]; \
else if (s3->bpp == 1) dat = vram_w[(addr) & (s3->vram_mask >> 1)]; \
else dat = vram_l[(addr) & (s3->vram_mask >> 2)]; \
dat &= s3->accel.rd_mask;
if (vram_mask) \
dat = ((dat & rd_mask) == rd_mask);
#define READ_DST(addr, dat) if (s3->bpp == 0) dat = svga->vram[ (addr) & s3->vram_mask]; \
else if (s3->bpp == 1) dat = vram_w[(addr) & (s3->vram_mask >> 1)]; \
@ -1576,6 +1577,7 @@ void s3_accel_start(int count, int cpu_input, uint32_t mix_dat, uint32_t cpu_dat
uint32_t *vram_l = (uint32_t *)svga->vram;
uint32_t compare = s3->accel.color_cmp;
int compare_mode = (s3->accel.multifunc[0xe] >> 7) & 3;
uint32_t rd_mask = s3->accel.rd_mask;
s3->force_busy = 1;
//return;
@ -1602,6 +1604,11 @@ void s3_accel_start(int count, int cpu_input, uint32_t mix_dat, uint32_t cpu_dat
if (s3->bpp == 1) count >>= 1;
if (s3->bpp == 3) count >>= 2;
}
if (s3->bpp == 0)
rd_mask &= 0xff;
else if (s3->bpp == 1)
rd_mask &= 0xffff;
switch (s3->accel.cmd & 0x600)
{