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More Cirrus Logic cursor-related fixes, fixes the hardware cursor on Windows NT 5.x.

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This commit is contained in:
OBattler
2018-03-23 05:26:28 +01:00
parent 48c44b5383
commit a26d477208
1 changed files with 21 additions and 28 deletions
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49
src/video/vid_cl54xx.c
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@@ -9,7 +9,7 @@
* Emulation of select Cirrus Logic cards (CL-GD 5428,
* CL-GD 5429, CL-GD 5430, CL-GD 5434 and CL-GD 5436 are supported).
*
* Version: @(#)vid_cl_54xx.c 1.0.15 2018/03/23
* Version: @(#)vid_cl_54xx.c 1.0.16 2018/03/23
*
* Authors: Sarah Walker, <http://pcem-emulator.co.uk/>
* Barry Rodewald,
@@ -282,30 +282,23 @@ gd54xx_out(uint16_t addr, uint8_t val, void *p)
svga->hwcursor.y = (val << 3) | (svga->seqaddr >> 5);
break;
case 0x12:
if ((o ^ val) & 0x80) {
if (val & 0x80)
svga->overscan_color = gd54xx->extpallook[2];
else
svga->overscan_color = svga->pallook[svga->attrregs[0x11]];
svga_recalctimings(svga);
}
if ((o ^ val) & CIRRUS_CURSOR_SHOW)
svga->hwcursor.ena = val & CIRRUS_CURSOR_SHOW;
if ((o ^ val) & CIRRUS_CURSOR_LARGE) {
svga->hwcursor.xsize = svga->hwcursor.ysize = (val & CIRRUS_CURSOR_LARGE) ? 64 : 32;
if (val & CIRRUS_CURSOR_LARGE)
svga->hwcursor.addr = (((gd54xx->vram_size<<20)-0x4000) + ((svga->seqregs[0x13] & 0x3c) * 256));
else
svga->hwcursor.addr = (((gd54xx->vram_size<<20)-0x4000) + ((svga->seqregs[0x13] & 0x3f) * 256));
}
if (val & 0x80)
svga->overscan_color = gd54xx->extpallook[2];
else
svga->overscan_color = svga->pallook[svga->attrregs[0x11]];
svga_recalctimings(svga);
svga->hwcursor.ena = val & CIRRUS_CURSOR_SHOW;
svga->hwcursor.xsize = svga->hwcursor.ysize = (val & CIRRUS_CURSOR_LARGE) ? 64 : 32;
if (val & CIRRUS_CURSOR_LARGE)
svga->hwcursor.addr = (((gd54xx->vram_size<<20)-0x4000) + ((svga->seqregs[0x13] & 0x3c) * 256));
else
svga->hwcursor.addr = (((gd54xx->vram_size<<20)-0x4000) + ((svga->seqregs[0x13] & 0x3f) * 256));
break;
case 0x13:
if (o != val) {
if (svga->seqregs[0x12] & CIRRUS_CURSOR_LARGE)
svga->hwcursor.addr = (((gd54xx->vram_size<<20)-0x4000) + ((val & 0x3c) * 256));
else
svga->hwcursor.addr = (((gd54xx->vram_size<<20)-0x4000) + ((val & 0x3f) * 256));
}
if (svga->seqregs[0x12] & CIRRUS_CURSOR_LARGE)
svga->hwcursor.addr = (((gd54xx->vram_size<<20)-0x4000) + ((val & 0x3c) * 256));
else
svga->hwcursor.addr = (((gd54xx->vram_size<<20)-0x4000) + ((val & 0x3f) * 256));
break;
case 0x07:
svga->set_reset_disabled = svga->seqregs[7] & 1;
@@ -860,7 +853,7 @@ static
void gd54xx_hwcursor_draw(svga_t *svga, int displine)
{
gd54xx_t *gd54xx = (gd54xx_t *)svga->p;
int x, xx, comb;
int x, xx, comb, b0, b1;
uint8_t dat[2];
int offset = svga->hwcursor_latch.x - svga->hwcursor_latch.xoff;
int y_add = (enable_overscan && !suppress_overscan) ? 16 : 0;
@@ -870,7 +863,7 @@ void gd54xx_hwcursor_draw(svga_t *svga, int displine)
uint32_t fgcol = gd54xx->extpallook[0x0f];
if (svga->interlace && svga->hwcursor_oddeven)
svga->hwcursor_latch.addr += pitch;
svga->hwcursor_latch.addr += pitch;
for (x = 0; x < svga->hwcursor.xsize; x += 8) {
dat[0] = svga->vram[svga->hwcursor_latch.addr];
@@ -879,8 +872,10 @@ void gd54xx_hwcursor_draw(svga_t *svga, int displine)
else
dat[1] = svga->vram[svga->hwcursor_latch.addr + 0x80];
for (xx = 0; xx < 8; xx++) {
b0 = (dat[0] >> (7 - xx)) & 1;
b1 = (dat[1] >> (7 - xx)) & 1;
comb = (b1 | (b0 << 1));
if (offset >= svga->hwcursor_latch.x) {
comb = ((dat[0] & 0x80) >> 6) | ((dat[1] & 0x80) >> 7);
switch(comb) {
case 0:
/* The original screen pixel is shown (invisible cursor) */
@@ -902,8 +897,6 @@ void gd54xx_hwcursor_draw(svga_t *svga, int displine)
}
offset++;
dat[0] <<= 1;
dat[1] <<= 1;
}
svga->hwcursor_latch.addr++;
}