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More fixes to the mode switching of the ATI/IBM 8514/A compatibles (June 28th, 2025)

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The mode switching phase now takes account of the display enable/reset bits of port 0x22e8 (bits 5-6). Fixes Solaris mode switching and keeps everything else happy (I hope).
This commit is contained in:
TC1995
2025-06-28 20:55:14 +02:00
parent d15e062c83
commit 5fbcbde4ba
4 changed files with 158 additions and 110 deletions
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12
src/video/vid_8514a.c
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@@ -911,8 +911,10 @@ ibm8514_accel_in(uint16_t port, svga_t *svga)
switch (port) {
case 0x2e8:
if (dev->vc == dev->v_syncstart)
temp |= 0x02;
if (dev->vc == dev->v_syncstart) {
if (dev->accel.advfunc_cntl & 0x04)
temp |= 0x02;
}
ibm8514_log("Read: Display Status1=%02x.\n", temp);
break;
@@ -3817,7 +3819,7 @@ ibm8514_recalctimings(svga_t *svga)
} else {
if (dev->on) {
dev->hdisp = (dev->hdisped + 1) << 3;
dev->h_total = dev->htotal + 1;
dev->h_total = (dev->htotal + 1) << 3;
if (dev->h_total == 1) /*Default to 1024x768 87hz 8514/A htotal timings if it goes to 0.*/
dev->h_total = 0x9e;
@@ -3827,10 +3829,14 @@ ibm8514_recalctimings(svga_t *svga)
dev->vdisp += 2;
dev->v_total = dev->v_total_reg + 1;
if (dev->v_total == 1)
dev->v_total = 0x0669;
if (dev->interlace)
dev->v_total >>= 1;
dev->v_syncstart = dev->v_sync_start + 1;
if (dev->v_syncstart == 1)
dev->v_syncstart = 0x0601;
if (dev->interlace)
dev->v_syncstart >>= 1;