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Merge pull request #4622 from 86Box/tc1995

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PVGA fixes of the day (July 16th, 2024)
This commit is contained in:
Miran Grča
2024-07-16 21:34:40 +02:00
committed by GitHub
parent 4112d5f08a 541b2ee556
commit 74d1aa97c1
1 changed files with 25 additions and 36 deletions
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61
src/video/vid_paradise.c
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@@ -45,6 +45,7 @@ typedef struct paradise_t {
} type;
uint32_t vram_mask;
uint32_t memory;
uint32_t read_bank[4], write_bank[4];
@@ -167,12 +168,10 @@ paradise_out(uint16_t addr, uint8_t val, void *priv)
return;
}
old = svga->gdcreg[svga->gdcaddr];
switch (svga->gdcaddr) {
case 6:
if ((val & 0xc) != (old & 0xc)) {
svga->gdcreg[6] = val;
switch (svga->gdcreg[6] & 0xc) {
if ((svga->gdcreg[6] & 0x0c) != (val & 0xc)) {
switch (val & 0x0c) {
case 0x0: /*128k at A0000*/
mem_mapping_set_addr(&svga->mapping, 0xa0000, 0x20000);
svga->banked_mask = 0xffff;
@@ -193,8 +192,9 @@ paradise_out(uint16_t addr, uint8_t val, void *priv)
default:
break;
}
paradise_remap(paradise);
}
svga->gdcreg[6] = val;
paradise_remap(paradise);
return;
case 9:
@@ -296,6 +296,8 @@ paradise_recalctimings(svga_t *svga)
{
const paradise_t *paradise = (paradise_t *) svga->priv;
svga->lowres = !(svga->gdcreg[0x0e] & 0x01);
if (paradise->type == WD90C30) {
if (svga->crtc[0x3e] & 0x01)
svga->vtotal |= 0x400;
@@ -309,22 +311,18 @@ paradise_recalctimings(svga_t *svga)
svga->split |= 0x400;
svga->interlace = !!(svga->crtc[0x2d] & 0x20);
if (!svga->interlace && !(svga->gdcreg[0x0e] & 0x01) && (svga->hdisp >= 1024) && ((svga->gdcreg[5] & 0x60) == 0) && (svga->miscout >= 0x27) && (svga->miscout <= 0x2f) && ((svga->gdcreg[6] & 1) || (svga->attrregs[0x10] & 1))) { /*Horrible tweak to re-enable the interlace after returning to
a windowed DOS box in Win3.x*/
svga->interlace = 1;
}
}
if (paradise->type < WD90C30) {
if ((svga->gdcreg[6] & 1) || (svga->attrregs[0x10] & 1)) {
if ((svga->bpp >= 8) && (svga->gdcreg[0x0e] & 0x01)) {
if ((svga->bpp >= 8) && !svga->lowres) {
svga->render = svga_render_8bpp_highres;
svga->vram_display_mask = (svga->crtc[0x2f] & 0x02) ? 0x3ffff : paradise->vram_mask;
}
}
} else {
if ((svga->gdcreg[6] & 1) || (svga->attrregs[0x10] & 1)) {
if ((svga->bpp >= 8) && (svga->gdcreg[0x0e] & 0x01)) {
if ((svga->bpp >= 8) && !svga->lowres) {
if (svga->bpp == 16) {
svga->render = svga_render_16bpp_highres;
svga->hdisp >>= 1;
@@ -339,13 +337,16 @@ paradise_recalctimings(svga_t *svga)
svga->hdisp += 12;
if (svga->hdisp == 800)
svga->ma_latch -= 3;
} else {
} else
svga->render = svga_render_8bpp_highres;
}
}
svga->vram_display_mask = (svga->crtc[0x2f] & 0x02) ? 0x3ffff : paradise->vram_mask;
} else if ((svga->bpp <= 8) && svga->lowres && !svga->interlace && (svga->hdisp >= 1024) &&
(svga->miscout >= 0x27) && (svga->miscout <= 0x2f))
svga->interlace = 1; /*Horrible tweak to re-enable the interlace after returning to
a windowed DOS box in Win3.x*/
}
}
svga->vram_display_mask = (svga->crtc[0x2f] & 0x02) ? 0x3ffff : paradise->vram_mask;
}
static void
@@ -356,15 +357,10 @@ paradise_write(uint32_t addr, uint8_t val, void *priv)
uint32_t prev_addr;
uint32_t prev_addr2;
if (!(svga->gdcreg[5] & 0x40)) {
svga_write(addr, val, svga);
return;
}
addr = (addr & 0x7fff) + paradise->write_bank[(addr >> 15) & 3];
/*Could be done in a better way but it works.*/
if ((svga->gdcreg[0x0e] & 0x01) || (svga->gdcreg[5] & 0x40)) {
if (!svga->lowres || (svga->attrregs[0x10] & 0x40)) {
if (((svga->gdcreg[6] & 0x0c) == 0x04) && (svga->crtc[0x14] & 0x40) && ((svga->gdcreg[0x0b] & 0xc0) == 0xc0) && !svga->chain4) {
prev_addr = addr & 3;
prev_addr2 = addr & 0xfffc;
@@ -385,6 +381,7 @@ paradise_write(uint32_t addr, uint8_t val, void *priv)
}
svga_write_linear(addr, val, svga);
}
static void
paradise_writew(uint32_t addr, uint16_t val, void *priv)
{
@@ -393,15 +390,10 @@ paradise_writew(uint32_t addr, uint16_t val, void *priv)
uint32_t prev_addr;
uint32_t prev_addr2;
if (!(svga->gdcreg[5] & 0x40)) {
svga_writew(addr, val, svga);
return;
}
addr = (addr & 0x7fff) + paradise->write_bank[(addr >> 15) & 3];
/*Could be done in a better way but it works.*/
if ((svga->gdcreg[0x0e] & 0x01) || (svga->gdcreg[5] & 0x40)) {
if (!svga->lowres || (svga->attrregs[0x10] & 0x40)) {
if (((svga->gdcreg[6] & 0x0c) == 0x04) && (svga->crtc[0x14] & 0x40) && ((svga->gdcreg[0x0b] & 0xc0) == 0xc0) && !svga->chain4) {
prev_addr = addr & 3;
prev_addr2 = addr & 0xfffc;
@@ -431,13 +423,10 @@ paradise_read(uint32_t addr, void *priv)
uint32_t prev_addr;
uint32_t prev_addr2;
if (!(svga->gdcreg[5] & 0x40))
return svga_read(addr, svga);
addr = (addr & 0x7fff) + paradise->read_bank[(addr >> 15) & 3];
/*Could be done in a better way but it works.*/
if ((svga->gdcreg[0x0e] & 0x01) || (svga->gdcreg[5] & 0x40)) {
if (!svga->lowres || (svga->attrregs[0x10] & 0x40)) {
if (((svga->gdcreg[6] & 0x0c) == 0x04) && (svga->crtc[0x14] & 0x40) && ((svga->gdcreg[0x0b] & 0xc0) == 0xc0) && !svga->chain4) {
prev_addr = addr & 3;
prev_addr2 = addr & 0xfffc;
@@ -458,6 +447,7 @@ paradise_read(uint32_t addr, void *priv)
}
return svga_read_linear(addr, svga);
}
static uint16_t
paradise_readw(uint32_t addr, void *priv)
{
@@ -466,13 +456,10 @@ paradise_readw(uint32_t addr, void *priv)
uint32_t prev_addr;
uint32_t prev_addr2;
if (!(svga->gdcreg[5] & 0x40))
return svga_readw(addr, svga);
addr = (addr & 0x7fff) + paradise->read_bank[(addr >> 15) & 3];
/*Could be done in a better way but it works.*/
if ((svga->gdcreg[0x0e] & 0x01) || (svga->gdcreg[5] & 0x40)) {
if (!svga->lowres || (svga->attrregs[0x10] & 0x40)) {
if (((svga->gdcreg[6] & 0x0c) == 0x04) && (svga->crtc[0x14] & 0x40) && ((svga->gdcreg[0x0b] & 0xc0) == 0xc0) && !svga->chain4) {
prev_addr = addr & 3;
prev_addr2 = addr & 0xfffc;
@@ -506,6 +493,8 @@ paradise_init(const device_t *info, uint32_t memsize)
else
video_inform(VIDEO_FLAG_TYPE_SPECIAL, &timing_paradise_wd90c);
paradise->memory = memsize >> 10;
switch (info->local) {
case PVGA1A:
svga_init(info, svga, paradise, memsize, /*256kb*/