1157 lines
57 KiB
C
1157 lines
57 KiB
C
/*EGA emulation*/
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#include <stdlib.h>
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#include "ibm.h"
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#include "device.h"
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#include "io.h"
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#include "mem.h"
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#include "rom.h"
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#include "timer.h"
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#include "video.h"
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#include "vid_ega.h"
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extern uint8_t edatlookup[4][4];
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static uint8_t ega_rotate[8][256];
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static uint32_t pallook16[256], pallook64[256];
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/*3C2 controls default mode on EGA. On VGA, it determines monitor type (mono or colour)*/
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int egaswitchread,egaswitches=9; /*7=CGA mode (200 lines), 9=EGA mode (350 lines), 8=EGA mode (200 lines)*/
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static uint8_t mask_gdc[9] = {0x0F, 0x0F, 0x0F, 0x1F, 0x03, 0x3B, 0x0F, 0x0F, 0xFF};
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static uint8_t ega_mask_crtc[0x19] = {0xFF, 0xFF, 0xFF, 0x7F, 0xFF, 0xFF, 0xFF, 0x1F, 0x1F, 0x1F, 0x1F, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0xFF, 0xFF, 0x1F, 0xFF, 0x1F, 0x7F, 0xFF};
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static uint8_t mask_seq[5] = {0x03, 0x1F, 0x0F, 0x0F, 0x06};
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static int old_overscan_color = 0;
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void ega_out(uint16_t addr, uint8_t val, void *p)
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{
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ega_t *ega = (ega_t *)p;
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int c;
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uint8_t o, old;
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if (((addr & 0xfff0) == 0x3d0 || (addr & 0xfff0) == 0x3b0) && !(ega->miscout & 1))
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addr ^= 0x60;
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switch (addr)
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{
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case 0x3c0:
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if (!ega->attrff)
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{
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ega->attraddr = val & 31;
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if ((val & 0x20) != ega->attr_palette_enable)
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{
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fullchange = 3;
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ega->attr_palette_enable = val & 0x20;
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ega_recalctimings(ega);
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}
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}
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else
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{
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o = ega->attrregs[ega->attraddr & 31];
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ega->attrregs[ega->attraddr & 31] = val;
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ega->attrregs[0x11] &= 0x3F;
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if (ega->attraddr < 16)
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fullchange = changeframecount;
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if (ega->attraddr == 0x10 || ega->attraddr == 0x14 || ega->attraddr < 0x10)
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{
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for (c = 0; c < 16; c++)
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{
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/* if (ega->attrregs[0x10] & 0x80) ega->egapal[c] = (ega->attrregs[c] & 0xf) | ((ega->attrregs[0x14] & 0xf) << 4);
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else ega->egapal[c] = (ega->attrregs[c] & 0x3f) | ((ega->attrregs[0x14] & 0xc) << 4); */
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if (ega->attrregs[0x10] & 0x80) ega->egapal[c] = (ega->attrregs[c] & 0xf) | ((ega->attrregs[0x14] & 0x3) << 4);
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else ega->egapal[c] = (ega->attrregs[c] & 0x3f);
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// if ((ega->attrregs[0x10] & 0x40) && gfxcard != GFX_EGA) ega->egapal[c] |= ((ega->attrregs[0x14] & 0xc) << 4);
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if (gfxcard != GFX_EGA) ega->egapal[c] |= ((ega->attrregs[0x14] & 0xc) << 4);
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}
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}
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if ((ega->attraddr == 0x10) || (ega->attraddr == 0x11))
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{
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if (o != val) ega_recalctimings(ega);
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}
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}
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ega->attrff ^= 1;
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break;
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case 0x3c2:
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egaswitchread = val & 0xc;
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ega->vres = !(val & 0x80);
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if (gfxcard == GFX_EGA)
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ega->pallook = ega->vres ? pallook16 : pallook64;
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else
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ega->pallook = pallook64;
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ega->vidclock = val & 4; /*printf("3C2 write %02X\n",val);*/
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ega->enablevram = (val & 2) ? 1 : 0;
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ega->oddeven_page = (val & 0x20) ? 0 : 1;
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ega->miscout=val;
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if (val & 1)
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{
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// pclog("Remove mono handler\n");
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io_removehandler(0x03a0, 0x0020, ega_in, NULL, NULL, ega_out, NULL, NULL, ega);
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}
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else
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{
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// pclog("Set mono handler\n");
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io_sethandler(0x03a0, 0x0020, ega_in, NULL, NULL, ega_out, NULL, NULL, ega);
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}
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ega_recalctimings(ega);
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break;
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case 0x3c4:
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ega->seqaddr = val;
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break;
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case 0x3c5:
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if (ega->seqaddr <= 4) val &= mask_seq[ega->seqaddr];
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o = ega->seqregs[ega->seqaddr & 0xf];
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ega->seqregs[ega->seqaddr & 0xf] = val;
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if (o != val && (ega->seqaddr & 0xf) == 1)
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ega_recalctimings(ega);
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switch (ega->seqaddr & 0xf)
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{
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case 1:
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if (ega->scrblank && !(val & 0x20))
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fullchange = 3;
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ega->scrblank = (ega->scrblank & ~0x20) | (val & 0x20);
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break;
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case 2:
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ega->writemask = val & 0xf;
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break;
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case 3:
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ega->charsetb = (((val >> 2) & 3) * 0x10000) + 2;
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ega->charseta = ((val & 3) * 0x10000) + 2;
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break;
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case 4:
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ega->chain2_write = !(val & 4);
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break;
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}
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break;
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case 0x3ce:
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ega->gdcaddr = val;
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break;
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case 0x3cf:
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if (ega->seqaddr <= 8) val &= mask_gdc[ega->gdcaddr];
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ega->gdcreg[ega->gdcaddr & 15] = val;
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switch (ega->gdcaddr & 15)
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{
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case 2:
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ega->colourcompare = val;
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break;
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case 4:
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ega->readplane = val & 3;
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break;
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case 5:
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ega->writemode = val & 3;
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ega->readmode = val & 8;
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ega->chain2_read = val & 0x10;
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break;
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case 6:
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// pclog("Write mapping %02X\n", val);
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switch (val & 0xc)
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{
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case 0x0: /*128k at A0000*/
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mem_mapping_set_addr(&ega->mapping, 0xa0000, 0x20000);
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break;
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case 0x4: /*64k at A0000*/
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mem_mapping_set_addr(&ega->mapping, 0xa0000, 0x10000);
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break;
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case 0x8: /*32k at B0000*/
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mem_mapping_set_addr(&ega->mapping, 0xb0000, 0x08000);
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break;
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case 0xC: /*32k at B8000*/
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mem_mapping_set_addr(&ega->mapping, 0xb8000, 0x08000);
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break;
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}
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break;
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case 7:
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ega->colournocare = val;
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break;
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}
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break;
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case 0x3d4:
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// pclog("Write 3d4 %02X %04X:%04X\n", val, CS, cpu_state.pc);
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ega->crtcreg = val & 31;
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return;
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case 0x3d5:
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// pclog("Write 3d5 %02X %02X %02X\n", ega->crtcreg, val, ega->crtc[0x11]);
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// if (ega->crtcreg == 1 && val == 0x14)
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// fatal("Here\n");
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if (ega->crtcreg <= 0x18) val &= ega_mask_crtc[ega->crtcreg];
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if (ega->crtcreg <= 7 && ega->crtc[0x11] & 0x80) return;
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old = ega->crtc[ega->crtcreg];
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ega->crtc[ega->crtcreg] = val;
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if (old != val)
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{
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if (ega->crtcreg < 0xe || ega->crtcreg > 0x10)
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{
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fullchange = changeframecount;
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ega_recalctimings(ega);
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}
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}
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break;
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}
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}
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uint8_t ega_in(uint16_t addr, void *p)
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{
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ega_t *ega = (ega_t *)p;
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/* if (addr != 0x3da && addr != 0x3ba)
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pclog("ega_in %04X\n", addr); */
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if (((addr & 0xfff0) == 0x3d0 || (addr & 0xfff0) == 0x3b0) && !(ega->miscout & 1))
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addr ^= 0x60;
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switch (addr)
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{
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case 0x3c0:
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return ega->attraddr;
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case 0x3c1:
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if (ega->attraddr == 0x10) return ((ega->attrregs[ega->attraddr] & 0x7F) | (ega->attrff << 7));
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return ega->attrregs[ega->attraddr];
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case 0x3c2:
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// printf("Read egaswitch %02X %02X %i\n",egaswitchread,egaswitches,VGA);
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switch (egaswitchread)
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{
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case 0xc: return (egaswitches & 1) ? 0x10 : 0;
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case 0x8: return (egaswitches & 2) ? 0x10 : 0;
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case 0x4: return (egaswitches & 4) ? 0x10 : 0;
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case 0x0: return (egaswitches & 8) ? 0x10 : 0;
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}
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break;
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case 0x3c4:
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return ega->seqaddr;
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case 0x3c5:
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return ega->seqregs[ega->seqaddr & 0xf];
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case 0x3ce:
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return ega->gdcaddr;
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case 0x3cf:
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if (ega->gdcaddr == 0xF8) return ega->la;
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if (ega->gdcaddr == 0xF9) return ega->lb;
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if (ega->gdcaddr == 0xFA) return ega->lc;
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if (ega->gdcaddr == 0xFB) return ega->ld;
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return ega->gdcreg[ega->gdcaddr & 0xf];
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case 0x3d4:
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return ega->crtcreg;
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case 0x3d5:
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return ega->crtc[ega->crtcreg];
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case 0x3da:
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ega->attrff = 0;
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// ega->stat ^= 0x30; /*Fools IBM EGA video BIOS self-test*/
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if (ega->stat & 0x01)
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ega->stat &= ~0x30;
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else
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ega->stat ^= 0x30;
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return ega->stat;
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}
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// printf("Bad EGA read %04X %04X:%04X\n",addr,cs>>4,cpu_state.pc);
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return 0xff;
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}
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void ega_recalctimings(ega_t *ega)
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{
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double _dispontime, _dispofftime, disptime;
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double crtcconst;
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ega->vtotal = ega->crtc[6];
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ega->dispend = ega->crtc[0x12];
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ega->vsyncstart = ega->crtc[0x10];
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ega->split = ega->crtc[0x18];
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ega->vblankstart = ega->crtc[0x15];
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if (ega->crtc[7] & 1) ega->vtotal |= 0x100;
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ega->vtotal++;
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if (ega->crtc[7] & 2) ega->dispend |= 0x100;
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ega->dispend++;
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if (ega->crtc[7] & 4) ega->vsyncstart |= 0x100;
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ega->vsyncstart++;
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if (ega->crtc[7] & 0x10) ega->split |= 0x100;
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ega->split+=2;
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if (ega->crtc[7] & 0x08) ega->vblankstart |= 0x100;
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ega->vblankstart++;
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ega->hdisp = ega->crtc[1];
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ega->hdisp++;
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ega->rowoffset = ega->crtc[0x13];
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// printf("Recalc! %i %i %i %i %i %02X\n", ega->vtotal, ega->dispend, ega->vsyncstart, ega->split, ega->hdisp, ega->attrregs[0x16]);
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if (ega->vblankstart < ega->dispend)
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ega->dispend = ega->vblankstart;
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if (ega->vidclock) crtcconst = (ega->seqregs[1] & 1) ? MDACONST : (MDACONST * (9.0 / 8.0));
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else crtcconst = (ega->seqregs[1] & 1) ? CGACONST : (CGACONST * (9.0 / 8.0));
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disptime = ega->crtc[0] + 2;
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_dispontime = ega->hdisp;
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// printf("Disptime %f dispontime %f hdisp %i\n",disptime,dispontime,crtc[1]*8);
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if (ega->seqregs[1] & 8) { disptime *= 2; _dispontime *= 2; }
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_dispofftime = disptime - _dispontime;
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_dispontime *= crtcconst;
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_dispofftime *= crtcconst;
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ega->dispontime = (int)(_dispontime * (1 << TIMER_SHIFT));
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ega->dispofftime = (int)(_dispofftime * (1 << TIMER_SHIFT));
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/* pclog("dispontime %i (%f) dispofftime %i (%f)\n", ega->dispontime, (float)ega->dispontime / (1 << TIMER_SHIFT),
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ega->dispofftime, (float)ega->dispofftime / (1 << TIMER_SHIFT)); */
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// printf("EGA horiz total %i display end %i clock rate %i vidclock %i %i\n",crtc[0],crtc[1],egaswitchread,vidclock,((ega3c2>>2)&3) | ((tridentnewctrl2<<2)&4));
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// printf("EGA vert total %i display end %i max row %i vsync %i\n",ega_vtotal,ega_dispend,(crtc[9]&31)+1,ega_vsyncstart);
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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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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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int y_add = enable_overscan ? 14 : 0;
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int x_add = enable_overscan ? 8 : 0;
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int y_add_ex = enable_overscan ? 28 : 0;
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int x_add_ex = enable_overscan ? 16 : 0;
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uint32_t *q, *r, i, j;
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if (!ega->linepos)
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{
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ega->vidtime += ega->dispofftime;
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ega->stat |= 1;
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ega->linepos = 1;
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if (ega->dispon)
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{
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if (ega->firstline == 2000)
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ega->firstline = ega->displine;
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if (ega->scrblank)
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{
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for (x = 0; x < ega->hdisp; x++)
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{
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switch (ega->seqregs[1] & 9)
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{
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case 0:
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for (xx = 0; xx < 9; xx++) ((uint32_t *)buffer32->line[ega->displine + y_add])[(x * 9) + xx + 32 + x_add] = 0;
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break;
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case 1:
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for (xx = 0; xx < 8; xx++) ((uint32_t *)buffer32->line[ega->displine + y_add])[(x * 8) + xx + 32 + x_add] = 0;
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break;
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case 8:
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for (xx = 0; xx < 18; xx++) ((uint32_t *)buffer32->line[ega->displine + y_add])[(x * 18) + xx + 32 + x_add] = 0;
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break;
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case 9:
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for (xx = 0; xx < 16; xx++) ((uint32_t *)buffer32->line[ega->displine + y_add])[(x * 16) + xx + 32 + x_add] = 0;
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break;
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}
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}
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}
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else if (!ega->scrblank && ega->attr_palette_enable)
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{
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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];
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attr = ega->vram[(ega->ma << 1) + 1];
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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 + y_add])[(((x << 4) + 32 + (xx << 1)) & 2047) + x_add] =
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((uint32_t *)buffer32->line[ega->displine + y_add])[(((x << 4) + 33 + (xx << 1)) & 2047) + x_add] = (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 + y_add])[(((x * 18) + 32 + (xx << 1)) & 2047) + x_add] =
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((uint32_t *)buffer32->line[ega->displine + y_add])[(((x * 18) + 33 + (xx << 1)) & 2047) + x_add] = (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 + y_add])[(((x * 18) + 32 + 16) & 2047) + x_add] =
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((uint32_t *)buffer32->line[ega->displine + y_add])[(((x * 18) + 32 + 17) & 2047) + x_add] = bg;
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else
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((uint32_t *)buffer32->line[ega->displine + y_add])[(((x * 18) + 32 + 16) & 2047) + x_add] =
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((uint32_t *)buffer32->line[ega->displine + y_add])[(((x * 18) + 32 + 17) & 2047) + x_add] = (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++)
|
|
((uint32_t *)buffer32->line[ega->displine + y_add])[(((x << 3) + 32 + xx) & 2047) + x_add] = (dat & (0x80 >> xx)) ? fg : bg;
|
|
}
|
|
else
|
|
{
|
|
for (xx = 0; xx < 8; xx++)
|
|
((uint32_t *)buffer32->line[ega->displine + y_add])[(((x * 9) + 32 + xx) & 2047) + x_add] = (dat & (0x80 >> xx)) ? fg : bg;
|
|
if ((chr & ~0x1f) != 0xc0 || !(ega->attrregs[0x10] & 4))
|
|
((uint32_t *)buffer32->line[ega->displine + y_add])[(((x * 9) + 32 + 8) & 2047) + x_add] = bg;
|
|
else
|
|
((uint32_t *)buffer32->line[ega->displine + y_add])[(((x * 9) + 32 + 8) & 2047) + x_add] = (dat & 1) ? fg : bg;
|
|
}
|
|
}
|
|
ega->ma += 4;
|
|
ega->ma &= ega->vrammask;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
switch (ega->gdcreg[5] & 0x20)
|
|
{
|
|
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 + y_add])[(x << 4) + 14 + offset + x_add] = ((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 15 + offset + x_add] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
|
|
((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 12 + offset + x_add] = ((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 13 + offset + x_add] = 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 + y_add])[(x << 4) + 10 + offset + x_add] = ((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 11 + offset + x_add] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
|
|
((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 8 + offset + x_add] = ((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 9 + offset + x_add] = 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 + y_add])[(x << 4) + 6 + offset + x_add] = ((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 7 + offset + x_add] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
|
|
((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 4 + offset + x_add] = ((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 5 + offset + x_add] = 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 + y_add])[(x << 4) + 2 + offset + x_add] = ((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 3 + offset + x_add] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
|
|
((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + offset + x_add] = ((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 1 + offset + x_add] = ega->pallook[ega->egapal[(dat >> 4) & ega->attrregs[0x12]]];
|
|
}
|
|
}
|
|
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 + y_add])[(x << 3) + 7 + offset + x_add] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
|
|
((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 3) + 6 + offset + x_add] = 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 + y_add])[(x << 3) + 5 + offset + x_add] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
|
|
((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 3) + 4 + offset + x_add] = 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 + y_add])[(x << 3) + 3 + offset + x_add] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
|
|
((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 3) + 2 + offset + x_add] = 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 + y_add])[(x << 3) + 1 + offset + x_add] = ega->pallook[ega->egapal[(dat & 0xf) & ega->attrregs[0x12]]];
|
|
((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 3) + offset + x_add] = ega->pallook[ega->egapal[(dat >> 4) & ega->attrregs[0x12]]];
|
|
}
|
|
}
|
|
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 + y_add])[(x << 4) + 14 + offset + x_add]= ((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 15 + offset + x_add] = ega->pallook[ega->egapal[edat[1] & 3]];
|
|
((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 12 + offset + x_add] = ((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 13 + offset + x_add] = ega->pallook[ega->egapal[(edat[1] >> 2) & 3]];
|
|
((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 10 + offset + x_add] = ((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 11 + offset + x_add] = ega->pallook[ega->egapal[(edat[1] >> 4) & 3]];
|
|
((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 8 + offset + x_add] = ((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 9 + offset + x_add] = ega->pallook[ega->egapal[(edat[1] >> 6) & 3]];
|
|
((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 6 + offset + x_add] = ((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 7 + offset + x_add] = ega->pallook[ega->egapal[(edat[0] >> 0) & 3]];
|
|
((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 4 + offset + x_add] = ((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 5 + offset + x_add] = ega->pallook[ega->egapal[(edat[0] >> 2) & 3]];
|
|
((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 2 + offset + x_add] = ((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 3 + offset + x_add] = ega->pallook[ega->egapal[(edat[0] >> 4) & 3]];
|
|
((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + offset + x_add] = ((uint32_t *)buffer32->line[ega->displine + y_add])[(x << 4) + 1 + offset + x_add] = ega->pallook[ega->egapal[(edat[0] >> 6) & 3]];
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (ega->lastline < ega->displine)
|
|
ega->lastline = ega->displine;
|
|
}
|
|
|
|
ega->displine++;
|
|
if ((ega->stat & 8) && ((ega->displine & 15) == (ega->crtc[0x11] & 15)) && ega->vslines)
|
|
ega->stat &= ~8;
|
|
ega->vslines++;
|
|
if (ega->displine > 500)
|
|
ega->displine = 0;
|
|
}
|
|
else
|
|
{
|
|
ega->vidtime += ega->dispontime;
|
|
// if (output) printf("Display on %f\n",vidtime);
|
|
if (ega->dispon)
|
|
ega->stat &= ~1;
|
|
ega->linepos = 0;
|
|
if (ega->sc == (ega->crtc[11] & 31))
|
|
ega->con = 0;
|
|
if (ega->dispon)
|
|
{
|
|
if (ega->sc == (ega->crtc[9] & 31))
|
|
{
|
|
ega->sc = 0;
|
|
|
|
ega->maback += (ega->rowoffset << 3);
|
|
ega->maback &= ega->vrammask;
|
|
ega->ma = ega->maback;
|
|
}
|
|
else
|
|
{
|
|
ega->sc++;
|
|
ega->sc &= 31;
|
|
ega->ma = ega->maback;
|
|
}
|
|
}
|
|
ega->vc++;
|
|
ega->vc &= 1023;
|
|
// printf("Line now %i %i ma %05X\n",vc,displine,ma);
|
|
if (ega->vc == ega->split)
|
|
{
|
|
// printf("Split at line %i %i\n",displine,vc);
|
|
ega->ma = ega->maback = 0;
|
|
if (ega->attrregs[0x10] & 0x20)
|
|
ega->scrollcache = 0;
|
|
}
|
|
if (ega->vc == ega->dispend)
|
|
{
|
|
// printf("Display over at line %i %i\n",displine,vc);
|
|
ega->dispon=0;
|
|
if (ega->crtc[10] & 0x20) ega->cursoron = 0;
|
|
else ega->cursoron = ega->blink & 16;
|
|
if (!(ega->gdcreg[6] & 1) && !(ega->blink & 15))
|
|
fullchange = 2;
|
|
ega->blink++;
|
|
|
|
if (fullchange)
|
|
fullchange--;
|
|
}
|
|
if (ega->vc == ega->vsyncstart)
|
|
{
|
|
int wx = 0;
|
|
int wy = 0;
|
|
ega->dispon = 0;
|
|
// printf("Vsync on at line %i %i\n",displine,vc);
|
|
ega->stat |= 8;
|
|
if (ega->seqregs[1] & 8) x = ega->hdisp * ((ega->seqregs[1] & 1) ? 8 : 9) * 2;
|
|
else x = ega->hdisp * ((ega->seqregs[1] & 1) ? 8 : 9);
|
|
// pclog("Cursor %02X %02X\n",crtc[10],crtc[11]);
|
|
// pclog("Firstline %i Lastline %i wx %i %i\n",firstline,lastline,wx,oddeven);
|
|
// doblit();
|
|
if (x != xsize || (ega->lastline - ega->firstline) != ysize)
|
|
{
|
|
xsize = x;
|
|
ysize = ega->lastline - ega->firstline;
|
|
if (xsize < 64) xsize = 640;
|
|
if (ysize < 32) ysize = 200;
|
|
if (ega->vres)
|
|
updatewindowsize(xsize + x_add_ex, (ysize << 1) + y_add_ex);
|
|
else
|
|
updatewindowsize(xsize + x_add_ex, ysize + y_add_ex);
|
|
}
|
|
|
|
startblit();
|
|
if (enable_overscan)
|
|
{
|
|
if ((x >= 160) && ((ega->lastline - ega->firstline) >= 120))
|
|
{
|
|
for (i = 0; i < 14; i++)
|
|
{
|
|
q = &((uint32_t *)buffer32->line[i])[32];
|
|
r = &((uint32_t *)buffer32->line[ysize + y_add_ex - 1 - i])[32];
|
|
|
|
for (j = 0; j < (xsize + x_add_ex); j++)
|
|
{
|
|
q[j] = ega->pallook[ega->attrregs[0x11]];
|
|
r[j] = ega->pallook[ega->attrregs[0x11]];
|
|
}
|
|
}
|
|
|
|
for (i = 14; i < (ysize + 14); i ++)
|
|
{
|
|
q = &((uint32_t *)buffer32->line[i])[32];
|
|
|
|
for (j = 0; j < 8; j++)
|
|
{
|
|
q[j] = ega->pallook[ega->attrregs[0x11]];
|
|
q[xsize + x_add_ex - 1 - j] = ega->pallook[ega->attrregs[0x11]];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
video_blit_memtoscreen(32, 0, ega->firstline, ega->lastline + y_add_ex, xsize + x_add_ex, ega->lastline - ega->firstline + y_add_ex);
|
|
endblit();
|
|
|
|
frames++;
|
|
|
|
ega->video_res_x = wx;
|
|
ega->video_res_y = wy + 1;
|
|
if (!(ega->gdcreg[6] & 1)) /*Text mode*/
|
|
{
|
|
ega->video_res_x /= (ega->seqregs[1] & 1) ? 8 : 9;
|
|
ega->video_res_y /= (ega->crtc[9] & 31) + 1;
|
|
ega->video_bpp = 0;
|
|
}
|
|
else
|
|
{
|
|
if (ega->crtc[9] & 0x80)
|
|
ega->video_res_y /= 2;
|
|
if (!(ega->crtc[0x17] & 1))
|
|
ega->video_res_y *= 2;
|
|
ega->video_res_y /= (ega->crtc[9] & 31) + 1;
|
|
if (ega->seqregs[1] & 8)
|
|
ega->video_res_x /= 2;
|
|
ega->video_bpp = (ega->gdcreg[5] & 0x20) ? 2 : 4;
|
|
}
|
|
|
|
// wakeupblit();
|
|
readflash=0;
|
|
//framecount++;
|
|
ega->firstline = 2000;
|
|
ega->lastline = 0;
|
|
|
|
ega->maback = ega->ma = (ega->crtc[0xc] << 8)| ega->crtc[0xd];
|
|
ega->ca = (ega->crtc[0xe] << 8) | ega->crtc[0xf];
|
|
ega->ma <<= 2;
|
|
ega->maback <<= 2;
|
|
ega->ca <<= 2;
|
|
changeframecount = 2;
|
|
ega->vslines = 0;
|
|
}
|
|
if (ega->vc == ega->vtotal)
|
|
{
|
|
ega->vc = 0;
|
|
ega->sc = 0;
|
|
ega->dispon = 1;
|
|
ega->displine = 0;
|
|
ega->scrollcache = ega->attrregs[0x13] & 7;
|
|
}
|
|
if (ega->sc == (ega->crtc[10] & 31))
|
|
ega->con = 1;
|
|
}
|
|
}
|
|
|
|
void ega_write(uint32_t addr, uint8_t val, void *p)
|
|
{
|
|
ega_t *ega = (ega_t *)p;
|
|
uint8_t vala, valb, valc, vald;
|
|
int writemask2 = ega->writemask;
|
|
uint32_t raddr = addr;
|
|
int plane, mask;
|
|
|
|
egawrites++;
|
|
cycles -= video_timing_b;
|
|
cycles_lost += video_timing_b;
|
|
|
|
/* Horrible hack, I know, but it's the only way to fix the 440FX BIOS filling the VRAM with garbage until Tom fixes the memory emulation. */
|
|
if ((cs == 0xE0000) && (cpu_state.pc == 0xBF2F) && (romset == ROM_440FX)) return;
|
|
if ((cs == 0xE0000) && (cpu_state.pc == 0xBF77) && (romset == ROM_440FX)) return;
|
|
|
|
if (addr >= 0xB0000) addr &= 0x7fff;
|
|
else addr &= 0xffff;
|
|
|
|
if (ega->chain2_write)
|
|
{
|
|
/* Redone because the original code caused problems when using Windows 3.1 EGA driver on (S)VGA card. */
|
|
if (ega->oddeven_chain)
|
|
plane = (addr & 1) | (ega->oddeven_page ? 2 : 0);
|
|
else
|
|
plane = (ega->oddeven_page ? 2 : 0);
|
|
mask = (1 << plane);
|
|
if (ega->seqregs[2] & mask)
|
|
{
|
|
if (ega->oddeven_chain)
|
|
addr = ((addr & ~1) << 2) | plane;
|
|
else
|
|
addr = (addr << 2) | plane;
|
|
if ((!ega->extvram) && (addr >= 0x10000)) return;
|
|
if (addr >= 0x40000) return;
|
|
if ((raddr <= 0xA0000) || (raddr >= 0xBFFFF)) return;
|
|
ega->vram[addr] = val;
|
|
}
|
|
return;
|
|
}
|
|
|
|
addr <<= 2;
|
|
|
|
if (!(ega->gdcreg[6] & 1))
|
|
fullchange = 2;
|
|
|
|
// pclog("%i %08X %i %i %02X %02X %02X %02X %02X\n",chain4,addr,writemode,writemask,gdcreg[8],vram[0],vram[1],vram[2],vram[3]);
|
|
switch (ega->writemode)
|
|
{
|
|
case 1:
|
|
if (writemask2 & 1) ega->vram[addr] = ega->la;
|
|
if (writemask2 & 2) ega->vram[addr | 0x1] = ega->lb;
|
|
if (writemask2 & 4) ega->vram[addr | 0x2] = ega->lc;
|
|
if (writemask2 & 8) ega->vram[addr | 0x3] = ega->ld;
|
|
break;
|
|
case 0:
|
|
if (ega->gdcreg[3] & 7)
|
|
val = ega_rotate[ega->gdcreg[3] & 7][val];
|
|
|
|
if (ega->gdcreg[8] == 0xff && !(ega->gdcreg[3] & 0x18) && !ega->gdcreg[1])
|
|
{
|
|
if (writemask2 & 1) ega->vram[addr] = val;
|
|
if (writemask2 & 2) ega->vram[addr | 0x1] = val;
|
|
if (writemask2 & 4) ega->vram[addr | 0x2] = val;
|
|
if (writemask2 & 8) ega->vram[addr | 0x3] = val;
|
|
}
|
|
else
|
|
{
|
|
if (ega->gdcreg[1] & 1) vala = (ega->gdcreg[0] & 1) ? 0xff : 0;
|
|
else vala = val;
|
|
if (ega->gdcreg[1] & 2) valb = (ega->gdcreg[0] & 2) ? 0xff : 0;
|
|
else valb = val;
|
|
if (ega->gdcreg[1] & 4) valc = (ega->gdcreg[0] & 4) ? 0xff : 0;
|
|
else valc = val;
|
|
if (ega->gdcreg[1] & 8) vald = (ega->gdcreg[0] & 8) ? 0xff : 0;
|
|
else vald = val;
|
|
// pclog("Write %02X %01X %02X %02X %02X %02X %02X\n",gdcreg[3]&0x18,writemask,vala,valb,valc,vald,gdcreg[8]);
|
|
switch (ega->gdcreg[3] & 0x18)
|
|
{
|
|
case 0: /*Set*/
|
|
if (writemask2 & 1) ega->vram[addr] = (vala & ega->gdcreg[8]) | (ega->la & ~ega->gdcreg[8]);
|
|
if (writemask2 & 2) ega->vram[addr | 0x1] = (valb & ega->gdcreg[8]) | (ega->lb & ~ega->gdcreg[8]);
|
|
if (writemask2 & 4) ega->vram[addr | 0x2] = (valc & ega->gdcreg[8]) | (ega->lc & ~ega->gdcreg[8]);
|
|
if (writemask2 & 8) ega->vram[addr | 0x3] = (vald & ega->gdcreg[8]) | (ega->ld & ~ega->gdcreg[8]);
|
|
break;
|
|
case 8: /*AND*/
|
|
if (writemask2 & 1) ega->vram[addr] = (vala | ~ega->gdcreg[8]) & ega->la;
|
|
if (writemask2 & 2) ega->vram[addr | 0x1] = (valb | ~ega->gdcreg[8]) & ega->lb;
|
|
if (writemask2 & 4) ega->vram[addr | 0x2] = (valc | ~ega->gdcreg[8]) & ega->lc;
|
|
if (writemask2 & 8) ega->vram[addr | 0x3] = (vald | ~ega->gdcreg[8]) & ega->ld;
|
|
break;
|
|
case 0x10: /*OR*/
|
|
if (writemask2 & 1) ega->vram[addr] = (vala & ega->gdcreg[8]) | ega->la;
|
|
if (writemask2 & 2) ega->vram[addr | 0x1] = (valb & ega->gdcreg[8]) | ega->lb;
|
|
if (writemask2 & 4) ega->vram[addr | 0x2] = (valc & ega->gdcreg[8]) | ega->lc;
|
|
if (writemask2 & 8) ega->vram[addr | 0x3] = (vald & ega->gdcreg[8]) | ega->ld;
|
|
break;
|
|
case 0x18: /*XOR*/
|
|
if (writemask2 & 1) ega->vram[addr] = (vala & ega->gdcreg[8]) ^ ega->la;
|
|
if (writemask2 & 2) ega->vram[addr | 0x1] = (valb & ega->gdcreg[8]) ^ ega->lb;
|
|
if (writemask2 & 4) ega->vram[addr | 0x2] = (valc & ega->gdcreg[8]) ^ ega->lc;
|
|
if (writemask2 & 8) ega->vram[addr | 0x3] = (vald & ega->gdcreg[8]) ^ ega->ld;
|
|
break;
|
|
}
|
|
// pclog("- %02X %02X %02X %02X %08X\n",vram[addr],vram[addr|0x1],vram[addr|0x2],vram[addr|0x3],addr);
|
|
}
|
|
break;
|
|
case 2:
|
|
if (!(ega->gdcreg[3] & 0x18) && !ega->gdcreg[1])
|
|
{
|
|
if (writemask2 & 1) ega->vram[addr] = (((val & 1) ? 0xff : 0) & ega->gdcreg[8]) | (ega->la & ~ega->gdcreg[8]);
|
|
if (writemask2 & 2) ega->vram[addr | 0x1] = (((val & 2) ? 0xff : 0) & ega->gdcreg[8]) | (ega->lb & ~ega->gdcreg[8]);
|
|
if (writemask2 & 4) ega->vram[addr | 0x2] = (((val & 4) ? 0xff : 0) & ega->gdcreg[8]) | (ega->lc & ~ega->gdcreg[8]);
|
|
if (writemask2 & 8) ega->vram[addr | 0x3] = (((val & 8) ? 0xff : 0) & ega->gdcreg[8]) | (ega->ld & ~ega->gdcreg[8]);
|
|
}
|
|
else
|
|
{
|
|
vala = ((val & 1) ? 0xff : 0);
|
|
valb = ((val & 2) ? 0xff : 0);
|
|
valc = ((val & 4) ? 0xff : 0);
|
|
vald = ((val & 8) ? 0xff : 0);
|
|
switch (ega->gdcreg[3] & 0x18)
|
|
{
|
|
case 0: /*Set*/
|
|
if (writemask2 & 1) ega->vram[addr] = (vala & ega->gdcreg[8]) | (ega->la & ~ega->gdcreg[8]);
|
|
if (writemask2 & 2) ega->vram[addr | 0x1] = (valb & ega->gdcreg[8]) | (ega->lb & ~ega->gdcreg[8]);
|
|
if (writemask2 & 4) ega->vram[addr | 0x2] = (valc & ega->gdcreg[8]) | (ega->lc & ~ega->gdcreg[8]);
|
|
if (writemask2 & 8) ega->vram[addr | 0x3] = (vald & ega->gdcreg[8]) | (ega->ld & ~ega->gdcreg[8]);
|
|
break;
|
|
case 8: /*AND*/
|
|
if (writemask2 & 1) ega->vram[addr] = (vala | ~ega->gdcreg[8]) & ega->la;
|
|
if (writemask2 & 2) ega->vram[addr | 0x1] = (valb | ~ega->gdcreg[8]) & ega->lb;
|
|
if (writemask2 & 4) ega->vram[addr | 0x2] = (valc | ~ega->gdcreg[8]) & ega->lc;
|
|
if (writemask2 & 8) ega->vram[addr | 0x3] = (vald | ~ega->gdcreg[8]) & ega->ld;
|
|
break;
|
|
case 0x10: /*OR*/
|
|
if (writemask2 & 1) ega->vram[addr] = (vala & ega->gdcreg[8]) | ega->la;
|
|
if (writemask2 & 2) ega->vram[addr | 0x1] = (valb & ega->gdcreg[8]) | ega->lb;
|
|
if (writemask2 & 4) ega->vram[addr | 0x2] = (valc & ega->gdcreg[8]) | ega->lc;
|
|
if (writemask2 & 8) ega->vram[addr | 0x3] = (vald & ega->gdcreg[8]) | ega->ld;
|
|
break;
|
|
case 0x18: /*XOR*/
|
|
if (writemask2 & 1) ega->vram[addr] = (vala & ega->gdcreg[8]) ^ ega->la;
|
|
if (writemask2 & 2) ega->vram[addr | 0x1] = (valb & ega->gdcreg[8]) ^ ega->lb;
|
|
if (writemask2 & 4) ega->vram[addr | 0x2] = (valc & ega->gdcreg[8]) ^ ega->lc;
|
|
if (writemask2 & 8) ega->vram[addr | 0x3] = (vald & ega->gdcreg[8]) ^ ega->ld;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
uint8_t ega_read(uint32_t addr, void *p)
|
|
{
|
|
ega_t *ega = (ega_t *)p;
|
|
uint8_t temp, temp2, temp3, temp4;
|
|
int readplane = ega->readplane;
|
|
int plane;
|
|
|
|
egareads++;
|
|
cycles -= video_timing_b;
|
|
cycles_lost += video_timing_b;
|
|
// pclog("Readega %06X ",addr);
|
|
if (addr >= 0xb0000) addr &= 0x7fff;
|
|
else addr &= 0xffff;
|
|
|
|
if (ega->chain2_read)
|
|
{
|
|
/* Redone because the original code caused problems when using Windows 3.1 EGA driver on (S)VGA card. */
|
|
if (ega->oddeven_chain)
|
|
{
|
|
plane = (addr & 1) | (ega->oddeven_page ? 2 : 0);
|
|
addr = ((addr & ~1) << 2) | plane;
|
|
}
|
|
else
|
|
{
|
|
plane = (ega->oddeven_page ? 2 : 0);
|
|
addr = (addr << 2) | plane;
|
|
}
|
|
|
|
if ((!ega->extvram) && (addr >= 0x10000)) return 0xff;
|
|
if (addr >= 0x40000) return 0xff;
|
|
return ega->vram[addr];
|
|
}
|
|
|
|
addr <<= 2;
|
|
|
|
ega->la = ega->vram[addr];
|
|
ega->lb = ega->vram[addr | 0x1];
|
|
ega->lc = ega->vram[addr | 0x2];
|
|
ega->ld = ega->vram[addr | 0x3];
|
|
if (ega->readmode)
|
|
{
|
|
temp = (ega->colournocare & 1) ? 0xff : 0;
|
|
temp &= ega->la;
|
|
temp ^= (ega->colourcompare & 1) ? 0xff : 0;
|
|
temp2 = (ega->colournocare & 2) ? 0xff : 0;
|
|
temp2 &= ega->lb;
|
|
temp2 ^= (ega->colourcompare & 2) ? 0xff : 0;
|
|
temp3 = (ega->colournocare & 4) ? 0xff : 0;
|
|
temp3 &= ega->lc;
|
|
temp3 ^= (ega->colourcompare & 4) ? 0xff : 0;
|
|
temp4 = (ega->colournocare & 8) ? 0xff : 0;
|
|
temp4 &= ega->ld;
|
|
temp4 ^= (ega->colourcompare & 8) ? 0xff : 0;
|
|
return ~(temp | temp2 | temp3 | temp4);
|
|
}
|
|
return ega->vram[addr | readplane];
|
|
}
|
|
|
|
void ega_init(ega_t *ega)
|
|
{
|
|
int c, d, e;
|
|
|
|
ega->vram = malloc(0x40000);
|
|
ega->vrammask = 0x3ffff;
|
|
|
|
for (c = 0; c < 256; c++)
|
|
{
|
|
e = c;
|
|
for (d = 0; d < 8; d++)
|
|
{
|
|
ega_rotate[d][c] = e;
|
|
e = (e >> 1) | ((e & 1) ? 0x80 : 0);
|
|
}
|
|
}
|
|
|
|
for (c = 0; c < 4; c++)
|
|
{
|
|
for (d = 0; d < 4; d++)
|
|
{
|
|
edatlookup[c][d] = 0;
|
|
if (c & 1) edatlookup[c][d] |= 1;
|
|
if (d & 1) edatlookup[c][d] |= 2;
|
|
if (c & 2) edatlookup[c][d] |= 0x10;
|
|
if (d & 2) edatlookup[c][d] |= 0x20;
|
|
}
|
|
}
|
|
|
|
for (c = 0; c < 256; c++)
|
|
{
|
|
pallook64[c] = makecol32(((c >> 2) & 1) * 0xaa, ((c >> 1) & 1) * 0xaa, (c & 1) * 0xaa);
|
|
pallook64[c] += makecol32(((c >> 5) & 1) * 0x55, ((c >> 4) & 1) * 0x55, ((c >> 3) & 1) * 0x55);
|
|
pallook16[c] = makecol32(((c >> 2) & 1) * 0xaa, ((c >> 1) & 1) * 0xaa, (c & 1) * 0xaa);
|
|
pallook16[c] += makecol32(((c >> 4) & 1) * 0x55, ((c >> 4) & 1) * 0x55, ((c >> 4) & 1) * 0x55);
|
|
if ((c & 0x17) == 6)
|
|
pallook16[c] = makecol32(0xaa, 0x55, 0);
|
|
}
|
|
ega->pallook = pallook16;
|
|
}
|
|
|
|
void ega_common_defaults(ega_t *ega)
|
|
{
|
|
ega->miscout |= 0x22;
|
|
ega->enablevram = 1;
|
|
ega->oddeven_page = 0;
|
|
|
|
ega->seqregs[4] |= 2;
|
|
ega->extvram = 1;
|
|
}
|
|
|
|
void *ega_standalone_init()
|
|
{
|
|
int c, d, e;
|
|
ega_t *ega = malloc(sizeof(ega_t));
|
|
memset(ega, 0, sizeof(ega_t));
|
|
|
|
overscan_x = 16;
|
|
overscan_y = 28;
|
|
|
|
rom_init(&ega->bios_rom, "roms/ibm_6277356_ega_card_u44_27128.bin", 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
|
|
|
|
if (ega->bios_rom.rom[0x3ffe] == 0xaa && ega->bios_rom.rom[0x3fff] == 0x55)
|
|
{
|
|
int c;
|
|
|
|
for (c = 0; c < 0x2000; c++)
|
|
{
|
|
uint8_t temp = ega->bios_rom.rom[c];
|
|
ega->bios_rom.rom[c] = ega->bios_rom.rom[0x3fff - c];
|
|
ega->bios_rom.rom[0x3fff - c] = temp;
|
|
}
|
|
}
|
|
|
|
ega->crtc[0] = 63;
|
|
ega->dispontime = 1000 * (1 << TIMER_SHIFT);
|
|
ega->dispofftime = 1000 * (1 << TIMER_SHIFT);
|
|
ega->dispontime <<= 1;
|
|
ega->dispofftime <<= 1;
|
|
|
|
ega_init(ega);
|
|
|
|
ega_common_defaults(ega);
|
|
|
|
mem_mapping_add(&ega->mapping, 0xa0000, 0x20000, ega_read, NULL, NULL, ega_write, NULL, NULL, NULL, 0, ega);
|
|
timer_add(ega_poll, &ega->vidtime, TIMER_ALWAYS_ENABLED, ega);
|
|
vramp = ega->vram;
|
|
io_sethandler(0x03c0, 0x0020, ega_in, NULL, NULL, ega_out, NULL, NULL, ega);
|
|
return ega;
|
|
}
|
|
|
|
void *cpqega_standalone_init()
|
|
{
|
|
int c, d, e;
|
|
ega_t *ega = malloc(sizeof(ega_t));
|
|
memset(ega, 0, sizeof(ega_t));
|
|
|
|
overscan_x = 16;
|
|
overscan_y = 28;
|
|
|
|
rom_init(&ega->bios_rom, "roms/108281-001.bin", 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
|
|
|
|
if (ega->bios_rom.rom[0x3ffe] == 0xaa && ega->bios_rom.rom[0x3fff] == 0x55)
|
|
{
|
|
int c;
|
|
// pclog("Read EGA ROM in reverse\n");
|
|
|
|
for (c = 0; c < 0x2000; c++)
|
|
{
|
|
uint8_t temp = ega->bios_rom.rom[c];
|
|
ega->bios_rom.rom[c] = ega->bios_rom.rom[0x3fff - c];
|
|
ega->bios_rom.rom[0x3fff - c] = temp;
|
|
}
|
|
}
|
|
|
|
ega->crtc[0] = 63;
|
|
// ega->crtc[6] = 255;
|
|
ega->dispontime = 1000 * (1 << TIMER_SHIFT);
|
|
ega->dispofftime = 1000 * (1 << TIMER_SHIFT);
|
|
|
|
ega_init(ega);
|
|
// ega->attrregs[0x10] |= 0xF7;
|
|
|
|
ega_common_defaults(ega);
|
|
|
|
mem_mapping_add(&ega->mapping, 0xa0000, 0x20000, ega_read, NULL, NULL, ega_write, NULL, NULL, NULL, 0, ega);
|
|
timer_add(ega_poll, &ega->vidtime, TIMER_ALWAYS_ENABLED, ega);
|
|
vramp = ega->vram;
|
|
// io_sethandler(0x03a0, 0x0040, ega_in, NULL, NULL, ega_out, NULL, NULL, ega);
|
|
io_sethandler(0x03c0, 0x0020, ega_in, NULL, NULL, ega_out, NULL, NULL, ega);
|
|
return ega;
|
|
}
|
|
|
|
void *sega_standalone_init()
|
|
{
|
|
int c, d, e;
|
|
ega_t *ega = malloc(sizeof(ega_t));
|
|
memset(ega, 0, sizeof(ega_t));
|
|
|
|
overscan_x = 16;
|
|
overscan_y = 28;
|
|
|
|
rom_init(&ega->bios_rom, "roms/lega.vbi", 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
|
|
|
|
if (ega->bios_rom.rom[0x3ffe] == 0xaa && ega->bios_rom.rom[0x3fff] == 0x55)
|
|
{
|
|
int c;
|
|
// pclog("Read EGA ROM in reverse\n");
|
|
|
|
for (c = 0; c < 0x2000; c++)
|
|
{
|
|
uint8_t temp = ega->bios_rom.rom[c];
|
|
ega->bios_rom.rom[c] = ega->bios_rom.rom[0x3fff - c];
|
|
ega->bios_rom.rom[0x3fff - c] = temp;
|
|
}
|
|
}
|
|
|
|
ega->crtc[0] = 63;
|
|
// ega->crtc[6] = 255;
|
|
ega->dispontime = 1000 * (1 << TIMER_SHIFT);
|
|
ega->dispofftime = 1000 * (1 << TIMER_SHIFT);
|
|
|
|
ega_init(ega);
|
|
// ega->attrregs[0x10] |= 0xF7;
|
|
|
|
ega_common_defaults(ega);
|
|
|
|
mem_mapping_add(&ega->mapping, 0xa0000, 0x20000, ega_read, NULL, NULL, ega_write, NULL, NULL, NULL, 0, ega);
|
|
timer_add(ega_poll, &ega->vidtime, TIMER_ALWAYS_ENABLED, ega);
|
|
vramp = ega->vram;
|
|
// io_sethandler(0x03a0, 0x0040, ega_in, NULL, NULL, ega_out, NULL, NULL, ega);
|
|
io_sethandler(0x03c0, 0x0020, ega_in, NULL, NULL, ega_out, NULL, NULL, ega);
|
|
return ega;
|
|
}
|
|
|
|
static int ega_standalone_available()
|
|
{
|
|
return rom_present("roms/ibm_6277356_ega_card_u44_27128.bin");
|
|
}
|
|
|
|
static int cpqega_standalone_available()
|
|
{
|
|
return rom_present("roms/108281-001.bin");
|
|
}
|
|
|
|
static int sega_standalone_available()
|
|
{
|
|
return rom_present("roms/lega.vbi");
|
|
}
|
|
|
|
void ega_close(void *p)
|
|
{
|
|
ega_t *ega = (ega_t *)p;
|
|
|
|
free(ega->vram);
|
|
free(ega);
|
|
}
|
|
|
|
void ega_speed_changed(void *p)
|
|
{
|
|
ega_t *ega = (ega_t *)p;
|
|
|
|
ega_recalctimings(ega);
|
|
}
|
|
|
|
device_t ega_device =
|
|
{
|
|
"EGA",
|
|
0,
|
|
ega_standalone_init,
|
|
ega_close,
|
|
ega_standalone_available,
|
|
ega_speed_changed,
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
device_t cpqega_device =
|
|
{
|
|
"Compaq EGA",
|
|
0,
|
|
cpqega_standalone_init,
|
|
ega_close,
|
|
cpqega_standalone_available,
|
|
ega_speed_changed,
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
device_t sega_device =
|
|
{
|
|
"SuperEGA",
|
|
0,
|
|
sega_standalone_init,
|
|
ega_close,
|
|
sega_standalone_available,
|
|
ega_speed_changed,
|
|
NULL,
|
|
NULL
|
|
};
|