Retro/pcem
Watch
1
0
Fork
You've already forked pcem
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Added emulation of CGA 3d8h bit 3 (display enable).

Browse source
This commit is contained in:
SarahW 2019-01-13 22:12:39 +00:00
commit 1ddcbdaf4c
1 changed files with 22 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

28
src/vid_cga.c
View file

@ -169,8 +169,13 @@ void cga_poll(void *p)
{
for (x = 0; x < cga->crtc[1]; x++)
{
chr = cga->charbuffer[x << 1];
attr = cga->charbuffer[(x << 1) + 1];
if (cga->cgamode & 8)
{
chr = cga->charbuffer[x << 1];
attr = cga->charbuffer[(x << 1) + 1];
}
else
chr = attr = 0;
drawcursor = ((cga->ma == ca) && cga->con && cga->cursoron);
if (cga->cgamode & 0x20)
{
@ -201,8 +206,13 @@ void cga_poll(void *p)
{
for (x = 0; x < cga->crtc[1]; x++)
{
chr = cga->vram[((cga->ma << 1) & 0x3fff)];
attr = cga->vram[(((cga->ma << 1) + 1) & 0x3fff)];
if (cga->cgamode & 8)
{
chr = cga->vram[((cga->ma << 1) & 0x3fff)];
attr = cga->vram[(((cga->ma << 1) + 1) & 0x3fff)];
}
else
chr = attr = 0;
drawcursor = ((cga->ma == ca) && cga->con && cga->cursoron);
if (cga->cgamode & 0x20)
{
@ -255,7 +265,10 @@ void cga_poll(void *p)
}
for (x = 0; x < cga->crtc[1]; x++)
{
dat = (cga->vram[((cga->ma << 1) & 0x1fff) + ((cga->sc & 1) * 0x2000)] << 8) | cga->vram[((cga->ma << 1) & 0x1fff) + ((cga->sc & 1) * 0x2000) + 1];
if (cga->cgamode & 8)
dat = (cga->vram[((cga->ma << 1) & 0x1fff) + ((cga->sc & 1) * 0x2000)] << 8) | cga->vram[((cga->ma << 1) & 0x1fff) + ((cga->sc & 1) * 0x2000) + 1];
else
dat = 0;
cga->ma++;
for (c = 0; c < 8; c++)
{
@ -271,7 +284,10 @@ void cga_poll(void *p)
cols[1] = cga->cgacol & 15;
for (x = 0; x < cga->crtc[1]; x++)
{
dat = (cga->vram[((cga->ma << 1) & 0x1fff) + ((cga->sc & 1) * 0x2000)] << 8) | cga->vram[((cga->ma << 1) & 0x1fff) + ((cga->sc & 1) * 0x2000) + 1];
if (cga->cgamode & 8)
dat = (cga->vram[((cga->ma << 1) & 0x1fff) + ((cga->sc & 1) * 0x2000)] << 8) | cga->vram[((cga->ma << 1) & 0x1fff) + ((cga->sc & 1) * 0x2000) + 1];
else
dat = 0;
cga->ma++;
for (c = 0; c < 16; c++)
{