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S3 ViRGE: Buffer flips no longer trigger recalctimings

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This commit is contained in:
Cacodemon345
2024-02-24 02:51:42 +06:00
parent f417a347a6
commit b49cd0baf4
1 changed files with 28 additions and 7 deletions
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35
src/video/vid_s3_virge.c
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@@ -835,6 +835,7 @@ s3_virge_recalctimings(svga_t *svga)
/* Also make sure vertical blanking starts on display end. */
svga->vblankstart = svga->dispend;
video_force_resize_set_monitor(1, svga->monitor_index);
} else {
svga->hblankstart = (((svga->crtc[0x5d] & 0x04) >> 2) << 8) + svga->crtc[2];
@@ -959,6 +960,27 @@ s3_virge_recalctimings(svga_t *svga)
}
}
static void
s3_virge_update_buffer(virge_t *virge)
{
svga_t *svga = &virge->svga;
if ((svga->crtc[0x67] & 0xc) != 0xc)
return;
if (virge->streams.buffer_ctrl & 1)
svga->ma_latch = virge->streams.pri_fb1 >> 2;
else
svga->ma_latch = virge->streams.pri_fb0 >> 2;
if (virge->streams.buffer_ctrl & 2)
svga->overlay.addr = virge->streams.sec_fb1;
else
svga->overlay.addr = virge->streams.sec_fb0;
svga->rowoffset = virge->streams.pri_stride >> 3;
}
static void
s3_virge_updatemapping(virge_t *virge)
{
@@ -1976,37 +1998,36 @@ s3_virge_mmio_write_l(uint32_t addr, uint32_t val, void *priv)
break;
case 0x81c0:
virge->streams.pri_fb0 = val & 0x7fffff;
svga_recalctimings(svga);
s3_virge_update_buffer(virge);
svga->fullchange = changeframecount;
break;
case 0x81c4:
virge->streams.pri_fb1 = val & 0x7fffff;
svga_recalctimings(svga);
s3_virge_update_buffer(virge);
svga->fullchange = changeframecount;
break;
case 0x81c8:
virge->streams.pri_stride = val & 0xfff;
svga_recalctimings(svga);
s3_virge_update_buffer(virge);
svga->fullchange = changeframecount;
break;
case 0x81cc:
virge->streams.buffer_ctrl = val;
svga_recalctimings(svga);
s3_virge_update_buffer(virge);
svga->fullchange = changeframecount;
break;
case 0x81d0:
virge->streams.sec_fb0 = val;
svga_recalctimings(svga);
s3_virge_update_buffer(virge);
svga->fullchange = changeframecount;
break;
case 0x81d4:
virge->streams.sec_fb1 = val;
svga_recalctimings(svga);
s3_virge_update_buffer(virge);
svga->fullchange = changeframecount;
break;
case 0x81d8:
virge->streams.sec_stride = val;
svga_recalctimings(svga);
svga->fullchange = changeframecount;
break;
case 0x81dc: