80486DX2-66/86Box-fork
1
0
Fork 0
Code Issues Pull Requests Activity

VGA/XGA memory fix.

Browse Source 
the XGA memory test takes account of Win3.x' XGA memory test again without conflicting XGAKIT's test, fixes DOS-based boxes using Win3.x XGA drivers in 386 mode.
This commit is contained in:
TC1995
2023-10-15 19:27:33 +02:00
parent 3d082d5ebe
commit 85bdf40a1c
1 changed files with 3 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
src/video/vid_svga.c
View File

@@ -1259,6 +1259,8 @@ svga_write_common(uint32_t addr, uint8_t val, uint8_t linear, void *priv)
xga->test = val;
if (addr == 0xa0001)
xga->a5_test = 1;
else if (addr == 0xafffe)
xga->a5_test = 2;
xga->on = 0;
vga_on = 1;
@@ -1479,7 +1481,7 @@ svga_read_common(uint32_t addr, uint8_t linear, void *priv)
ret = xga->test;
xga->on = 1;
vga_on = 0;
} else if ((addr == 0xa0000) && xga->a5_test) { /*This is required by XGAKIT to pass the memory test*/
} else if ((addr == 0xa0000) && (xga->a5_test == 1)) { /*This is required by XGAKIT to pass the memory test*/
svga_log("A5 test bank = %x.\n", addr);
addr += xga->read_bank;
ret = xga->vram[addr & xga->vram_mask];