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Fixed display in 8 bpp modes with doublescan enabled (fixes "Doom" on Win95).

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This commit is contained in:
Volker Ruppert 2017-02-07 17:02:52 +00:00
parent f844e846b7
commit 69dcf1c253
1 changed files with 8 additions and 2 deletions
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10
bochs/iodev/display/svga_cirrus.cc
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@ -1345,7 +1345,11 @@ void bx_svga_cirrus_c::svga_update(void)
for (yc=0, yti = 0; yc<height; yc+=Y_TILESIZE, yti++) {
for (xc=0, xti = 0; xc<width; xc+=X_TILESIZE, xti++) {
if (GET_TILE_UPDATED (xti, yti)) {
vid_ptr = BX_CIRRUS_THIS disp_ptr + (yc * pitch + xc);
if (!BX_CIRRUS_THIS s.y_doublescan) {
vid_ptr = BX_CIRRUS_THIS disp_ptr + (yc * pitch + xc);
} else {
vid_ptr = BX_CIRRUS_THIS disp_ptr + ((yc >> 1) * pitch + xc);
}
tile_ptr = bx_gui->graphics_tile_get(xc, yc, &w, &h);
for (r=0; r<h; r++) {
vid_ptr2 = vid_ptr;
@ -1367,7 +1371,9 @@ void bx_svga_cirrus_c::svga_update(void)
}
}
}
vid_ptr += pitch;
if (!BX_CIRRUS_THIS s.y_doublescan || (r & 1)) {
vid_ptr += pitch;
}
tile_ptr += info.pitch;
}
draw_hardware_cursor(xc, yc, &info);