Reworked EGA plotting code a bit.
Tweaked EGA odd/even handling - 640x350x4 with 64kb video memory now works.
This commit is contained in:
SarahW
parent
80a411b85f
commit
47b4e1da1c
1 changed files with 253 additions and 171 deletions
424
src/vid_ega.c
424
src/vid_ega.c
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@ -250,16 +250,253 @@ void ega_recalctimings(ega_t *ega)
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// printf("total %f on %f cycles off %f cycles frame %f sec %f %02X\n",disptime*crtcconst,dispontime,dispofftime,(dispontime+dispofftime)*ega_vtotal,(dispontime+dispofftime)*ega_vtotal*70,seqregs[1]);
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}
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static void ega_draw_text(ega_t *ega)
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{
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int x, xx;
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for (x = 0; x < ega->hdisp; x++)
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{
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int drawcursor = ((ega->ma == ega->ca) && ega->con && ega->cursoron);
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uint8_t chr = ega->vram[(ega->ma << 1) & ega->vrammask];
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uint8_t attr = ega->vram[((ega->ma << 1) + 1) & ega->vrammask];
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uint8_t dat;
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uint32_t fg, bg;
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uint32_t charaddr;
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if (attr & 8)
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charaddr = ega->charsetb + (chr * 128);
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else
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charaddr = ega->charseta + (chr * 128);
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if (drawcursor)
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{
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bg = ega->pallook[ega->egapal[attr & 15]];
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fg = ega->pallook[ega->egapal[attr >> 4]];
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}
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else
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{
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fg = ega->pallook[ega->egapal[attr & 15]];
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bg = ega->pallook[ega->egapal[attr >> 4]];
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if (attr & 0x80 && ega->attrregs[0x10] & 8)
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{
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bg = ega->pallook[ega->egapal[(attr >> 4) & 7]];
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if (ega->blink & 16)
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fg = bg;
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}
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}
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dat = ega->vram[charaddr + (ega->sc << 2)];
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if (ega->seqregs[1] & 8)
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{
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if (ega->seqregs[1] & 1)
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{
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for (xx = 0; xx < 8; xx++)
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((uint32_t *)buffer32->line[ega->displine])[((x << 4) + 32 + (xx << 1)) & 2047] =
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((uint32_t *)buffer32->line[ega->displine])[((x << 4) + 33 + (xx << 1)) & 2047] = (dat & (0x80 >> xx)) ? fg : bg;
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}
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else
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{
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for (xx = 0; xx < 8; xx++)
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((uint32_t *)buffer32->line[ega->displine])[((x * 18) + 32 + (xx << 1)) & 2047] =
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((uint32_t *)buffer32->line[ega->displine])[((x * 18) + 33 + (xx << 1)) & 2047] = (dat & (0x80 >> xx)) ? fg : bg;
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if ((chr & ~0x1f) != 0xc0 || !(ega->attrregs[0x10] & 4))
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((uint32_t *)buffer32->line[ega->displine])[((x * 18) + 32 + 16) & 2047] =
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((uint32_t *)buffer32->line[ega->displine])[((x * 18) + 32 + 17) & 2047] = bg;
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else
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((uint32_t *)buffer32->line[ega->displine])[((x * 18) + 32 + 16) & 2047] =
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((uint32_t *)buffer32->line[ega->displine])[((x * 18) + 32 + 17) & 2047] = (dat & 1) ? fg : bg;
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}
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}
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else
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{
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if (ega->seqregs[1] & 1)
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{
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for (xx = 0; xx < 8; xx++)
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((uint32_t *)buffer32->line[ega->displine])[((x << 3) + 32 + xx) & 2047] = (dat & (0x80 >> xx)) ? fg : bg;
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}
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else
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{
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for (xx = 0; xx < 8; xx++)
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((uint32_t *)buffer32->line[ega->displine])[((x * 9) + 32 + xx) & 2047] = (dat & (0x80 >> xx)) ? fg : bg;
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if ((chr & ~0x1f) != 0xc0 || !(ega->attrregs[0x10] & 4))
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((uint32_t *)buffer32->line[ega->displine])[((x * 9) + 32 + 8) & 2047] = bg;
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else
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((uint32_t *)buffer32->line[ega->displine])[((x * 9) + 32 + 8) & 2047] = (dat & 1) ? fg : bg;
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}
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}
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ega->ma += 4;
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ega->ma &= ega->vrammask;
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}
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}
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static void ega_draw_2bpp(ega_t *ega)
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{
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int x;
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int offset = ((8 - ega->scrollcache) << 1) + 16;
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for (x = 0; x <= ega->hdisp; x++)
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{
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uint8_t edat[2];
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uint32_t addr = ega->ma;
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if (!(ega->crtc[0x17] & 0x40))
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{
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addr = (addr << 1) & ega->vrammask;
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addr &= ~7;
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if ((ega->crtc[0x17] & 0x20) && (ega->ma & 0x20000))
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addr |= 4;
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if (!(ega->crtc[0x17] & 0x20) && (ega->ma & 0x8000))
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addr |= 4;
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}
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if (!(ega->crtc[0x17] & 0x01))
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addr = (addr & ~0x8000) | ((ega->sc & 1) ? 0x8000 : 0);
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if (!(ega->crtc[0x17] & 0x02))
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addr = (addr & ~0x10000) | ((ega->sc & 2) ? 0x10000 : 0);
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edat[0] = ega->vram[addr];
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edat[1] = ega->vram[addr | 0x1];
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if (ega->seqregs[1] & 4)
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ega->ma += 2;
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else
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ega->ma += 4;
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ega->ma &= ega->vrammask;
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((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 14 + offset]= ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 15 + offset] = ega->pallook[ega->egapal[edat[1] & 3]];
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((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 12 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 13 + offset] = ega->pallook[ega->egapal[(edat[1] >> 2) & 3]];
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((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 10 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 11 + offset] = ega->pallook[ega->egapal[(edat[1] >> 4) & 3]];
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((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 8 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 9 + offset] = ega->pallook[ega->egapal[(edat[1] >> 6) & 3]];
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((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 6 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 7 + offset] = ega->pallook[ega->egapal[(edat[0] >> 0) & 3]];
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((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 4 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 5 + offset] = ega->pallook[ega->egapal[(edat[0] >> 2) & 3]];
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((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 2 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 3 + offset] = ega->pallook[ega->egapal[(edat[0] >> 4) & 3]];
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((uint32_t *)buffer32->line[ega->displine])[(x << 4) + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 1 + offset] = ega->pallook[ega->egapal[(edat[0] >> 6) & 3]];
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}
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}
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static void ega_draw_4bpp_lowres(ega_t *ega)
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{
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int x;
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int offset = ((8 - ega->scrollcache) << 1) + 16;
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for (x = 0; x <= ega->hdisp; x++)
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{
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uint8_t edat[4];
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uint8_t dat;
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uint32_t addr = ega->ma;
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int oddeven = 0;
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if (!(ega->crtc[0x17] & 0x40))
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{
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addr = (addr << 1) & ega->vrammask;
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if (ega->seqregs[1] & 4)
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oddeven = (addr & 4) ? 1 : 0;
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addr &= ~7;
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if ((ega->crtc[0x17] & 0x20) && (ega->ma & 0x20000))
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addr |= 4;
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if (!(ega->crtc[0x17] & 0x20) && (ega->ma & 0x8000))
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addr |= 4;
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}
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if (!(ega->crtc[0x17] & 0x01))
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addr = (addr & ~0x8000) | ((ega->sc & 1) ? 0x8000 : 0);
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if (!(ega->crtc[0x17] & 0x02))
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addr = (addr & ~0x10000) | ((ega->sc & 2) ? 0x10000 : 0);
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if (ega->seqregs[1] & 4)
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{
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edat[0] = ega->vram[addr | oddeven];
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edat[2] = ega->vram[addr | oddeven | 0x2];
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edat[1] = edat[3] = 0;
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ega->ma += 2;
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}
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else
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{
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edat[0] = ega->vram[addr];
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edat[1] = ega->vram[addr | 0x1];
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edat[2] = ega->vram[addr | 0x2];
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edat[3] = ega->vram[addr | 0x3];
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ega->ma += 4;
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}
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ega->ma &= ega->vrammask;
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dat = edatlookup[edat[0] & 3][edat[1] & 3] | (edatlookup[edat[2] & 3][edat[3] & 3] << 2);
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((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 14 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 15 + offset] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
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((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 12 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 13 + offset] = ega->pallook[ega->egapal[(dat >> 4) & ega->attrregs[0x12]]];
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dat = edatlookup[(edat[0] >> 2) & 3][(edat[1] >> 2) & 3] | (edatlookup[(edat[2] >> 2) & 3][(edat[3] >> 2) & 3] << 2);
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((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 10 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 11 + offset] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
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((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 8 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 9 + offset] = ega->pallook[ega->egapal[(dat >> 4) & ega->attrregs[0x12]]];
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dat = edatlookup[(edat[0] >> 4) & 3][(edat[1] >> 4) & 3] | (edatlookup[(edat[2] >> 4) & 3][(edat[3] >> 4) & 3] << 2);
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((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 6 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 7 + offset] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
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((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 4 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 5 + offset] = ega->pallook[ega->egapal[(dat >> 4) & ega->attrregs[0x12]]];
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dat = edatlookup[edat[0] >> 6][edat[1] >> 6] | (edatlookup[edat[2] >> 6][edat[3] >> 6] << 2);
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((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 2 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 3 + offset] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
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((uint32_t *)buffer32->line[ega->displine])[(x << 4) + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 1 + offset] = ega->pallook[ega->egapal[(dat >> 4) & ega->attrregs[0x12]]];
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}
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}
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static void ega_draw_4bpp_highres(ega_t *ega)
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{
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int x;
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int offset = (8 - ega->scrollcache) + 24;
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for (x = 0; x <= ega->hdisp; x++)
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{
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uint8_t edat[4];
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uint8_t dat;
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uint32_t addr = ega->ma;
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int oddeven = 0;
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if (!(ega->crtc[0x17] & 0x40))
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{
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addr = (addr << 1) & ega->vrammask;
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if (ega->seqregs[1] & 4)
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oddeven = (addr & 4) ? 1 : 0;
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addr &= ~7;
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if ((ega->crtc[0x17] & 0x20) && (ega->ma & 0x20000))
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addr |= 4;
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if (!(ega->crtc[0x17] & 0x20) && (ega->ma & 0x8000))
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addr |= 4;
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}
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if (!(ega->crtc[0x17] & 0x01))
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addr = (addr & ~0x8000) | ((ega->sc & 1) ? 0x8000 : 0);
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if (!(ega->crtc[0x17] & 0x02))
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addr = (addr & ~0x10000) | ((ega->sc & 2) ? 0x10000 : 0);
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if (ega->seqregs[1] & 4)
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{
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edat[0] = ega->vram[addr | oddeven];
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edat[2] = ega->vram[addr | oddeven | 0x2];
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edat[1] = edat[3] = 0;
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ega->ma += 2;
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}
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else
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{
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edat[0] = ega->vram[addr];
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edat[1] = ega->vram[addr | 0x1];
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edat[2] = ega->vram[addr | 0x2];
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edat[3] = ega->vram[addr | 0x3];
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ega->ma += 4;
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}
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ega->ma &= ega->vrammask;
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dat = edatlookup[edat[0] & 3][edat[1] & 3] | (edatlookup[edat[2] & 3][edat[3] & 3] << 2);
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((uint32_t *)buffer32->line[ega->displine])[(x << 3) + 7 + offset] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
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((uint32_t *)buffer32->line[ega->displine])[(x << 3) + 6 + offset] = ega->pallook[ega->egapal[(dat >> 4) & ega->attrregs[0x12]]];
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dat = edatlookup[(edat[0] >> 2) & 3][(edat[1] >> 2) & 3] | (edatlookup[(edat[2] >> 2) & 3][(edat[3] >> 2) & 3] << 2);
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((uint32_t *)buffer32->line[ega->displine])[(x << 3) + 5 + offset] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
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((uint32_t *)buffer32->line[ega->displine])[(x << 3) + 4 + offset] = ega->pallook[ega->egapal[(dat >> 4) & ega->attrregs[0x12]]];
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dat = edatlookup[(edat[0] >> 4) & 3][(edat[1] >> 4) & 3] | (edatlookup[(edat[2] >> 4) & 3][(edat[3] >> 4) & 3] << 2);
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((uint32_t *)buffer32->line[ega->displine])[(x << 3) + 3 + offset] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
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((uint32_t *)buffer32->line[ega->displine])[(x << 3) + 2 + offset] = ega->pallook[ega->egapal[(dat >> 4) & ega->attrregs[0x12]]];
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dat = edatlookup[edat[0] >> 6][edat[1] >> 6] | (edatlookup[edat[2] >> 6][edat[3] >> 6] << 2);
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((uint32_t *)buffer32->line[ega->displine])[(x << 3) + 1 + offset] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
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((uint32_t *)buffer32->line[ega->displine])[(x << 3) + offset] = ega->pallook[ega->egapal[(dat >> 4) & ega->attrregs[0x12]]];
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}
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}
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void ega_poll(void *p)
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{
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ega_t *ega = (ega_t *)p;
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uint8_t chr, dat, attr;
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uint32_t charaddr;
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int x, xx;
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uint32_t fg, bg;
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int offset;
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uint8_t edat[4];
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int drawcursor = 0;
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if (!ega->linepos)
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{
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@ -300,76 +537,7 @@ void ega_poll(void *p)
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else if (!(ega->gdcreg[6] & 1))
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{
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if (fullchange)
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{
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for (x = 0; x < ega->hdisp; x++)
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{
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drawcursor = ((ega->ma == ega->ca) && ega->con && ega->cursoron);
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chr = ega->vram[(ega->ma << 1) & ega->vrammask];
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attr = ega->vram[((ega->ma << 1) + 1) & ega->vrammask];
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if (attr & 8) charaddr = ega->charsetb + (chr * 128);
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else charaddr = ega->charseta + (chr * 128);
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if (drawcursor)
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{
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bg = ega->pallook[ega->egapal[attr & 15]];
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fg = ega->pallook[ega->egapal[attr >> 4]];
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}
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else
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{
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fg = ega->pallook[ega->egapal[attr & 15]];
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bg = ega->pallook[ega->egapal[attr >> 4]];
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if (attr & 0x80 && ega->attrregs[0x10] & 8)
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{
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bg = ega->pallook[ega->egapal[(attr >> 4) & 7]];
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if (ega->blink & 16)
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fg = bg;
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}
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}
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dat = ega->vram[charaddr + (ega->sc << 2)];
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if (ega->seqregs[1] & 8)
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{
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if (ega->seqregs[1] & 1)
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{
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for (xx = 0; xx < 8; xx++)
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((uint32_t *)buffer32->line[ega->displine])[((x << 4) + 32 + (xx << 1)) & 2047] =
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((uint32_t *)buffer32->line[ega->displine])[((x << 4) + 33 + (xx << 1)) & 2047] = (dat & (0x80 >> xx)) ? fg : bg;
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}
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else
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{
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for (xx = 0; xx < 8; xx++)
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((uint32_t *)buffer32->line[ega->displine])[((x * 18) + 32 + (xx << 1)) & 2047] =
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((uint32_t *)buffer32->line[ega->displine])[((x * 18) + 33 + (xx << 1)) & 2047] = (dat & (0x80 >> xx)) ? fg : bg;
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if ((chr & ~0x1f) != 0xc0 || !(ega->attrregs[0x10] & 4))
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((uint32_t *)buffer32->line[ega->displine])[((x * 18) + 32 + 16) & 2047] =
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((uint32_t *)buffer32->line[ega->displine])[((x * 18) + 32 + 17) & 2047] = bg;
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else
|
||||
((uint32_t *)buffer32->line[ega->displine])[((x * 18) + 32 + 16) & 2047] =
|
||||
((uint32_t *)buffer32->line[ega->displine])[((x * 18) + 32 + 17) & 2047] = (dat & 1) ? fg : bg;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
if (ega->seqregs[1] & 1)
|
||||
{
|
||||
for (xx = 0; xx < 8; xx++)
|
||||
((uint32_t *)buffer32->line[ega->displine])[((x << 3) + 32 + xx) & 2047] = (dat & (0x80 >> xx)) ? fg : bg;
|
||||
}
|
||||
else
|
||||
{
|
||||
for (xx = 0; xx < 8; xx++)
|
||||
((uint32_t *)buffer32->line[ega->displine])[((x * 9) + 32 + xx) & 2047] = (dat & (0x80 >> xx)) ? fg : bg;
|
||||
if ((chr & ~0x1f) != 0xc0 || !(ega->attrregs[0x10] & 4))
|
||||
((uint32_t *)buffer32->line[ega->displine])[((x * 9) + 32 + 8) & 2047] = bg;
|
||||
else
|
||||
((uint32_t *)buffer32->line[ega->displine])[((x * 9) + 32 + 8) & 2047] = (dat & 1) ? fg : bg;
|
||||
}
|
||||
}
|
||||
ega->ma += 4;
|
||||
ega->ma &= ega->vrammask;
|
||||
}
|
||||
}
|
||||
ega_draw_text(ega);
|
||||
}
|
||||
else
|
||||
{
|
||||
|
|
@ -377,104 +545,12 @@ void ega_poll(void *p)
|
|||
{
|
||||
case 0x00:
|
||||
if (ega->seqregs[1] & 8)
|
||||
{
|
||||
offset = ((8 - ega->scrollcache) << 1) + 16;
|
||||
for (x = 0; x <= ega->hdisp; x++)
|
||||
{
|
||||
if (ega->sc & 1 && !(ega->crtc[0x17] & 1))
|
||||
{
|
||||
edat[0] = ega->vram[ega->ma | 0x8000];
|
||||
edat[1] = ega->vram[ega->ma | 0x8001];
|
||||
edat[2] = ega->vram[ega->ma | 0x8002];
|
||||
edat[3] = ega->vram[ega->ma | 0x8003];
|
||||
}
|
||||
else
|
||||
{
|
||||
edat[0] = ega->vram[ega->ma];
|
||||
edat[1] = ega->vram[ega->ma | 0x1];
|
||||
edat[2] = ega->vram[ega->ma | 0x2];
|
||||
edat[3] = ega->vram[ega->ma | 0x3];
|
||||
}
|
||||
ega->ma += 4;
|
||||
ega->ma &= ega->vrammask;
|
||||
|
||||
dat = edatlookup[edat[0] & 3][edat[1] & 3] | (edatlookup[edat[2] & 3][edat[3] & 3] << 2);
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 14 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 15 + offset] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 12 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 13 + offset] = ega->pallook[ega->egapal[(dat >> 4) & ega->attrregs[0x12]]];
|
||||
dat = edatlookup[(edat[0] >> 2) & 3][(edat[1] >> 2) & 3] | (edatlookup[(edat[2] >> 2) & 3][(edat[3] >> 2) & 3] << 2);
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 10 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 11 + offset] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 8 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 9 + offset] = ega->pallook[ega->egapal[(dat >> 4) & ega->attrregs[0x12]]];
|
||||
dat = edatlookup[(edat[0] >> 4) & 3][(edat[1] >> 4) & 3] | (edatlookup[(edat[2] >> 4) & 3][(edat[3] >> 4) & 3] << 2);
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 6 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 7 + offset] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 4 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 5 + offset] = ega->pallook[ega->egapal[(dat >> 4) & ega->attrregs[0x12]]];
|
||||
dat = edatlookup[edat[0] >> 6][edat[1] >> 6] | (edatlookup[edat[2] >> 6][edat[3] >> 6] << 2);
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 2 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 3 + offset] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 4) + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 1 + offset] = ega->pallook[ega->egapal[(dat >> 4) & ega->attrregs[0x12]]];
|
||||
}
|
||||
}
|
||||
ega_draw_4bpp_lowres(ega);
|
||||
else
|
||||
{
|
||||
offset = (8 - ega->scrollcache) + 24;
|
||||
for (x = 0; x <= ega->hdisp; x++)
|
||||
{
|
||||
if (ega->sc & 1 && !(ega->crtc[0x17] & 1))
|
||||
{
|
||||
edat[0] = ega->vram[ega->ma | 0x8000];
|
||||
edat[1] = ega->vram[ega->ma | 0x8001];
|
||||
edat[2] = ega->vram[ega->ma | 0x8002];
|
||||
edat[3] = ega->vram[ega->ma | 0x8003];
|
||||
}
|
||||
else
|
||||
{
|
||||
edat[0] = ega->vram[ega->ma];
|
||||
edat[1] = ega->vram[ega->ma | 0x1];
|
||||
edat[2] = ega->vram[ega->ma | 0x2];
|
||||
edat[3] = ega->vram[ega->ma | 0x3];
|
||||
}
|
||||
ega->ma += 4;
|
||||
ega->ma &= ega->vrammask;
|
||||
|
||||
dat = edatlookup[edat[0] & 3][edat[1] & 3] | (edatlookup[edat[2] & 3][edat[3] & 3] << 2);
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 3) + 7 + offset] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 3) + 6 + offset] = ega->pallook[ega->egapal[(dat >> 4) & ega->attrregs[0x12]]];
|
||||
dat = edatlookup[(edat[0] >> 2) & 3][(edat[1] >> 2) & 3] | (edatlookup[(edat[2] >> 2) & 3][(edat[3] >> 2) & 3] << 2);
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 3) + 5 + offset] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 3) + 4 + offset] = ega->pallook[ega->egapal[(dat >> 4) & ega->attrregs[0x12]]];
|
||||
dat = edatlookup[(edat[0] >> 4) & 3][(edat[1] >> 4) & 3] | (edatlookup[(edat[2] >> 4) & 3][(edat[3] >> 4) & 3] << 2);
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 3) + 3 + offset] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 3) + 2 + offset] = ega->pallook[ega->egapal[(dat >> 4) & ega->attrregs[0x12]]];
|
||||
dat = edatlookup[edat[0] >> 6][edat[1] >> 6] | (edatlookup[edat[2] >> 6][edat[3] >> 6] << 2);
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 3) + 1 + offset] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 3) + offset] = ega->pallook[ega->egapal[(dat >> 4) & ega->attrregs[0x12]]];
|
||||
}
|
||||
}
|
||||
ega_draw_4bpp_highres(ega);
|
||||
break;
|
||||
case 0x20:
|
||||
offset = ((8 - ega->scrollcache) << 1) + 16;
|
||||
for (x = 0; x <= ega->hdisp; x++)
|
||||
{
|
||||
if (ega->sc & 1 && !(ega->crtc[0x17] & 1))
|
||||
{
|
||||
edat[0] = ega->vram[(ega->ma << 1) + 0x8000];
|
||||
edat[1] = ega->vram[(ega->ma << 1) + 0x8001];
|
||||
}
|
||||
else
|
||||
{
|
||||
edat[0] = ega->vram[(ega->ma << 1)];
|
||||
edat[1] = ega->vram[(ega->ma << 1) + 1];
|
||||
}
|
||||
ega->ma += 4;
|
||||
ega->ma &= ega->vrammask;
|
||||
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 14 + offset]= ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 15 + offset] = ega->pallook[ega->egapal[edat[1] & 3]];
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 12 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 13 + offset] = ega->pallook[ega->egapal[(edat[1] >> 2) & 3]];
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 10 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 11 + offset] = ega->pallook[ega->egapal[(edat[1] >> 4) & 3]];
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 8 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 9 + offset] = ega->pallook[ega->egapal[(edat[1] >> 6) & 3]];
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 6 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 7 + offset] = ega->pallook[ega->egapal[(edat[0] >> 0) & 3]];
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 4 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 5 + offset] = ega->pallook[ega->egapal[(edat[0] >> 2) & 3]];
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 2 + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 3 + offset] = ega->pallook[ega->egapal[(edat[0] >> 4) & 3]];
|
||||
((uint32_t *)buffer32->line[ega->displine])[(x << 4) + offset] = ((uint32_t *)buffer32->line[ega->displine])[(x << 4) + 1 + offset] = ega->pallook[ega->egapal[(edat[0] >> 6) & 3]];
|
||||
}
|
||||
ega_draw_2bpp(ega);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
|
@ -632,6 +708,9 @@ void ega_write(uint32_t addr, uint8_t val, void *p)
|
|||
if (addr & 1)
|
||||
writemask2 <<= 1;
|
||||
addr &= ~1;
|
||||
if (addr & 0x4000)
|
||||
addr |= 1;
|
||||
addr &= ~0x4000;
|
||||
}
|
||||
|
||||
addr <<= 2;
|
||||
|
|
@ -766,6 +845,9 @@ uint8_t ega_read(uint32_t addr, void *p)
|
|||
{
|
||||
readplane = (readplane & 2) | (addr & 1);
|
||||
addr &= ~1;
|
||||
if (addr & 0x4000)
|
||||
addr |= 1;
|
||||
addr &= ~0x4000;
|
||||
}
|
||||
|
||||
addr <<= 2;
|
||||
|
|
|
|||
Loading…
Reference in a new issue