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Fix read of Cirrus Logic cursor position registers. OS/2 Warp now detects CL cards correctly.

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This commit is contained in:
SarahW 2019-05-16 21:52:07 +01:00
commit 12f8751e5c
1 changed files with 11 additions and 0 deletions
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11
src/vid_cl5429.c
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@ -71,6 +71,8 @@ typedef struct gd5429_t
uint32_t lfb_base;
int mmio_vram_overlap;
uint8_t sr10_read, sr11_read;
} gd5429_t;
static void gd5429_mmio_write(uint32_t addr, uint8_t val, void *p);
@ -111,11 +113,13 @@ void gd5429_out(uint16_t addr, uint8_t val, void *p)
case 0x10: case 0x30: case 0x50: case 0x70:
case 0x90: case 0xb0: case 0xd0: case 0xf0:
svga->hwcursor.x = (val << 3) | ((svga->seqaddr >> 5) & 7);
gd5429->sr10_read = svga->seqaddr & 0xe0;
// pclog("svga->hwcursor.x = %i\n", svga->hwcursor.x);
break;
case 0x11: case 0x31: case 0x51: case 0x71:
case 0x91: case 0xb1: case 0xd1: case 0xf1:
svga->hwcursor.y = (val << 3) | ((svga->seqaddr >> 5) & 7);
gd5429->sr11_read = svga->seqaddr & 0xe0;
// pclog("svga->hwcursor.y = %i\n", svga->hwcursor.y);
break;
case 0x12:
@ -311,6 +315,13 @@ uint8_t gd5429_in(uint16_t addr, void *p)
switch (addr)
{
case 0x3c4:
if ((svga->seqaddr & 0x1f) == 0x10)
return (svga->seqaddr & 0x1f) | gd5429->sr10_read;
if ((svga->seqaddr & 0x1f) == 0x11)
return (svga->seqaddr & 0x1f) | gd5429->sr11_read;
return svga->seqaddr & 0x1f;
case 0x3c5:
if (svga->seqaddr > 5)
{