#include #include #include "ibm.h" #include "device.h" #include "io.h" #include "mem.h" #include "timer.h" #include "video.h" #include "vid_pcjr.h" #define PCJR_RGB 0 #define PCJR_COMPOSITE 1 typedef struct pcjr_t { mem_mapping_t mapping; uint8_t crtc[32]; int crtcreg; int array_index; uint8_t array[32]; int array_ff; int memctrl;//=-1; uint8_t stat; int addr_mode; uint8_t *vram, *b8000; int linepos, displine; int sc, vc; int dispon; int con, coff, cursoron, blink; int vsynctime, vadj; uint16_t ma, maback; int dispontime, dispofftime, vidtime; int firstline, lastline; int composite; } pcjr_t; static uint8_t crtcmask[32] = { 0xff, 0xff, 0xff, 0xff, 0x7f, 0x1f, 0x7f, 0x7f, 0xf3, 0x1f, 0x7f, 0x1f, 0x3f, 0xff, 0x3f, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; void pcjr_recalcaddress(pcjr_t *pcjr); void pcjr_recalctimings(pcjr_t *pcjr); void pcjr_out(uint16_t addr, uint8_t val, void *p) { pcjr_t *pcjr = (pcjr_t *)p; uint8_t old; // pclog("pcjr OUT %04X %02X\n",addr,val); switch (addr) { case 0x3d4: pcjr->crtcreg = val & 0x1f; return; case 0x3d5: // pclog("CRTC write %02X %02x\n", pcjr->crtcreg, val); old = pcjr->crtc[pcjr->crtcreg]; pcjr->crtc[pcjr->crtcreg] = val & crtcmask[pcjr->crtcreg]; if (old != val) { if (pcjr->crtcreg < 0xe || pcjr->crtcreg > 0x10) { fullchange = changeframecount; pcjr_recalctimings(pcjr); } } return; case 0x3da: // pclog("Array write %02X %02X\n", pcjr->array_index, val); if (!pcjr->array_ff) pcjr->array_index = val & 0x1f; else { if (pcjr->array_index & 0x10) val &= 0x0f; pcjr->array[pcjr->array_index & 0x1f] = val; if (!(pcjr->array_index & 0x1f)) update_cga16_color(val); } pcjr->array_ff = !pcjr->array_ff; break; case 0x3df: pcjr->memctrl = val; pcjr->addr_mode = val >> 6; pcjr_recalcaddress(pcjr); break; } } uint8_t pcjr_in(uint16_t addr, void *p) { pcjr_t *pcjr = (pcjr_t *)p; // if (addr!=0x3DA) pclog("pcjr IN %04X\n",addr); switch (addr) { case 0x3d4: return pcjr->crtcreg; case 0x3d5: return pcjr->crtc[pcjr->crtcreg]; case 0x3da: pcjr->array_ff = 0; pcjr->stat ^= 0x10; return pcjr->stat; } return 0xFF; } void pcjr_recalcaddress(pcjr_t *pcjr) { if ((pcjr->memctrl & 0xc0) == 0xc0) { pcjr->vram = &ram[(pcjr->memctrl & 0x06) << 14]; pcjr->b8000 = &ram[(pcjr->memctrl & 0x30) << 11]; // printf("VRAM at %05X B8000 at %05X\n",((pcjr->memctrl&0x6)<<14)+pcjr->base,((pcjr->memctrl&0x30)<<11)+pcjr->base); } else { pcjr->vram = &ram[(pcjr->memctrl & 0x07) << 14]; pcjr->b8000 = &ram[(pcjr->memctrl & 0x38) << 11]; // printf("VRAM at %05X B8000 at %05X\n",((pcjr->memctrl&0x7)<<14)+pcjr->base,((pcjr->memctrl&0x38)<<11)+pcjr->base); } } void pcjr_write(uint32_t addr, uint8_t val, void *p) { pcjr_t *pcjr = (pcjr_t *)p; if (pcjr->memctrl == -1) return; egawrites++; // pclog("pcjr VRAM write %05X %02X %04X:%04X %04X:%04X\n",addr,val,CS,pc,DS,SI); pcjr->b8000[addr & 0x3fff] = val; } uint8_t pcjr_read(uint32_t addr, void *p) { pcjr_t *pcjr = (pcjr_t *)p; if (pcjr->memctrl == -1) return 0xff; egareads++; // pclog("pcjr VRAM read %05X %02X %04X:%04X\n",addr,pcjr->b8000[addr&0x7FFF],CS,pc); return pcjr->b8000[addr & 0x3fff]; } void pcjr_recalctimings(pcjr_t *pcjr) { double _dispontime, _dispofftime, disptime; if (pcjr->array[0] & 1) { disptime = pcjr->crtc[0] + 1; _dispontime = pcjr->crtc[1]; } else { disptime = (pcjr->crtc[0] + 1) << 1; _dispontime = pcjr->crtc[1] << 1; } _dispofftime = disptime - _dispontime; _dispontime *= CGACONST; _dispofftime *= CGACONST; pcjr->dispontime = (int)(_dispontime * (1 << TIMER_SHIFT)); pcjr->dispofftime = (int)(_dispofftime * (1 << TIMER_SHIFT)); } static int ntsc_col[8][8]= { {0,0,0,0,0,0,0,0}, /*Black*/ {0,0,1,1,1,1,0,0}, /*Blue*/ {1,0,0,0,0,1,1,1}, /*Green*/ {0,0,0,0,1,1,1,1}, /*Cyan*/ {1,1,1,1,0,0,0,0}, /*Red*/ {0,1,1,1,1,0,0,0}, /*Magenta*/ {1,1,0,0,0,0,1,1}, /*Yellow*/ {1,1,1,1,1,1,1,1} /*White*/ }; /*static int cga4pal[8][4]= { {0,2,4,6},{0,3,5,7},{0,3,4,7},{0,3,4,7}, {0,10,12,14},{0,11,13,15},{0,11,12,15},{0,11,12,15} };*/ void pcjr_poll(void *p) { // int *cgapal=cga4pal[((pcjr->col&0x10)>>2)|((cgamode&4)>>1)|((cgacol&0x20)>>5)]; pcjr_t *pcjr = (pcjr_t *)p; uint16_t ca = (pcjr->crtc[15] | (pcjr->crtc[14] << 8)) & 0x3fff; int drawcursor; int x, c; int oldvc; uint8_t chr, attr; uint16_t dat; int cols[4]; int col; int oldsc; int y_buf[8] = {0, 0, 0, 0, 0, 0, 0, 0}, y_val, y_tot; int i_buf[8] = {0, 0, 0, 0, 0, 0, 0, 0}, i_val, i_tot; int q_buf[8] = {0, 0, 0, 0, 0, 0, 0, 0}, q_val, q_tot; int r, g, b; if (!pcjr->linepos) { // cgapal[0]=pcjr->col&15; // printf("Firstline %i Lastline %i pcjr->displine %i\n",firstline,lastline,pcjr->displine); pcjr->vidtime += pcjr->dispofftime; pcjr->stat &= ~1; pcjr->linepos = 1; oldsc = pcjr->sc; if ((pcjr->crtc[8] & 3) == 3) pcjr->sc = (pcjr->sc << 1) & 7; if (pcjr->dispon) { uint16_t offset = 0; uint16_t mask = 0x1fff; if (pcjr->displine < pcjr->firstline) { pcjr->firstline = pcjr->displine; video_wait_for_buffer(); } pcjr->lastline = pcjr->displine; cols[0] = (pcjr->array[2] & 0xf) + 16; for (c = 0; c < 8; c++) { buffer->line[pcjr->displine][c] = cols[0]; if (pcjr->array[0] & 1) buffer->line[pcjr->displine][c + (pcjr->crtc[1] << 3) + 8] = cols[0]; else buffer->line[pcjr->displine][c + (pcjr->crtc[1] << 4) + 8] = cols[0]; } switch (pcjr->addr_mode) { case 0: /*Alpha*/ offset = 0; mask = 0x3fff; break; case 1: /*Low resolution graphics*/ offset = (pcjr->sc & 1) * 0x2000; break; case 3: /*High resolution graphics*/ offset = (pcjr->sc & 3) * 0x2000; break; } switch ((pcjr->array[0] & 0x13) | ((pcjr->array[3] & 0x08) << 5)) { case 0x13: /*320x200x16*/ for (x = 0; x < pcjr->crtc[1]; x++) { dat = (pcjr->vram[((pcjr->ma << 1) & mask) + offset] << 8) | pcjr->vram[((pcjr->ma << 1) & mask) + offset + 1]; pcjr->ma++; buffer->line[pcjr->displine][(x << 3) + 8] = buffer->line[pcjr->displine][(x << 3) + 9] = pcjr->array[((dat >> 12) & pcjr->array[1]) + 16] + 16; buffer->line[pcjr->displine][(x << 3) + 10] = buffer->line[pcjr->displine][(x << 3) + 11] = pcjr->array[((dat >> 8) & pcjr->array[1]) + 16] + 16; buffer->line[pcjr->displine][(x << 3) + 12] = buffer->line[pcjr->displine][(x << 3) + 13] = pcjr->array[((dat >> 4) & pcjr->array[1]) + 16] + 16; buffer->line[pcjr->displine][(x << 3) + 14] = buffer->line[pcjr->displine][(x << 3) + 15] = pcjr->array[(dat & pcjr->array[1]) + 16] + 16; } break; case 0x12: /*160x200x16*/ for (x = 0; x < pcjr->crtc[1]; x++) { dat = (pcjr->vram[((pcjr->ma << 1) & mask) + offset] << 8) | pcjr->vram[((pcjr->ma << 1) & mask) + offset + 1]; pcjr->ma++; buffer->line[pcjr->displine][(x << 4) + 8] = buffer->line[pcjr->displine][(x << 4) + 9] = buffer->line[pcjr->displine][(x << 4) + 10] = buffer->line[pcjr->displine][(x << 4) + 11] = pcjr->array[((dat >> 12) & pcjr->array[1]) + 16] + 16; buffer->line[pcjr->displine][(x << 4) + 12] = buffer->line[pcjr->displine][(x << 4) + 13] = buffer->line[pcjr->displine][(x << 4) + 14] = buffer->line[pcjr->displine][(x << 4) + 15] = pcjr->array[((dat >> 8) & pcjr->array[1]) + 16] + 16; buffer->line[pcjr->displine][(x << 4) + 16] = buffer->line[pcjr->displine][(x << 4) + 17] = buffer->line[pcjr->displine][(x << 4) + 18] = buffer->line[pcjr->displine][(x << 4) + 19] = pcjr->array[((dat >> 4) & pcjr->array[1]) + 16] + 16; buffer->line[pcjr->displine][(x << 4) + 20] = buffer->line[pcjr->displine][(x << 4) + 21] = buffer->line[pcjr->displine][(x << 4) + 22] = buffer->line[pcjr->displine][(x << 4) + 23] = pcjr->array[(dat & pcjr->array[1]) + 16] + 16; } break; case 0x03: /*640x200x4*/ for (x = 0; x < pcjr->crtc[1]; x++) { dat = (pcjr->vram[((pcjr->ma << 1) & mask) + offset] << 8) | pcjr->vram[((pcjr->ma << 1) & mask) + offset + 1]; pcjr->ma++; for (c = 0; c < 8; c++) { chr = (dat >> 7) & 1; chr |= ((dat >> 14) & 2); buffer->line[pcjr->displine][(x << 3) + 8 + c] = pcjr->array[(chr & pcjr->array[1]) + 16] + 16; dat <<= 1; } } break; case 0x01: /*80 column text*/ for (x = 0; x < pcjr->crtc[1]; x++) { chr = pcjr->vram[((pcjr->ma << 1) & mask) + offset]; attr = pcjr->vram[((pcjr->ma << 1) & mask) + offset + 1]; drawcursor = ((pcjr->ma == ca) && pcjr->con && pcjr->cursoron); if (pcjr->array[3] & 4) { cols[1] = pcjr->array[ ((attr & 15) & pcjr->array[1]) + 16] + 16; cols[0] = pcjr->array[(((attr >> 4) & 7) & pcjr->array[1]) + 16] + 16; if ((pcjr->blink & 16) && (attr & 0x80) && !drawcursor) cols[1] = cols[0]; } else { cols[1] = pcjr->array[((attr & 15) & pcjr->array[1]) + 16] + 16; cols[0] = pcjr->array[((attr >> 4) & pcjr->array[1]) + 16] + 16; } if (pcjr->sc & 8) { for (c = 0; c < 8; c++) buffer->line[pcjr->displine][(x << 3) + c + 8] = cols[0]; } else { for (c = 0; c < 8; c++) buffer->line[pcjr->displine][(x << 3) + c + 8] = cols[(fontdat[chr][pcjr->sc & 7] & (1 << (c ^ 7))) ? 1 : 0]; } // if (!((ma^(crtc[15]|(crtc[14]<<8)))&0x3FFF)) printf("Cursor match! %04X\n",ma); if (drawcursor) { for (c = 0; c < 8; c++) buffer->line[pcjr->displine][(x << 3) + c + 8] ^= 15; } pcjr->ma++; } break; case 0x00: /*40 column text*/ for (x = 0; x < pcjr->crtc[1]; x++) { chr = pcjr->vram[((pcjr->ma << 1) & mask) + offset]; attr = pcjr->vram[((pcjr->ma << 1) & mask) + offset + 1]; drawcursor = ((pcjr->ma == ca) && pcjr->con && pcjr->cursoron); if (pcjr->array[3] & 4) { cols[1] = pcjr->array[ ((attr & 15) & pcjr->array[1]) + 16] + 16; cols[0] = pcjr->array[(((attr >> 4) & 7) & pcjr->array[1]) + 16] + 16; if ((pcjr->blink & 16) && (attr & 0x80) && !drawcursor) cols[1] = cols[0]; } else { cols[1] = pcjr->array[((attr & 15) & pcjr->array[1]) + 16] + 16; cols[0] = pcjr->array[((attr >> 4) & pcjr->array[1]) + 16] + 16; } pcjr->ma++; if (pcjr->sc & 8) { for (c = 0; c < 8; c++) buffer->line[pcjr->displine][(x << 4) + (c << 1) + 8] = buffer->line[pcjr->displine][(x << 4) + (c << 1) + 1 + 8] = cols[0]; } else { for (c = 0; c < 8; c++) buffer->line[pcjr->displine][(x << 4) + (c << 1) + 8] = buffer->line[pcjr->displine][(x << 4) + (c << 1) + 1 + 8] = cols[(fontdat[chr][pcjr->sc & 7] & (1 << (c ^ 7))) ? 1 : 0]; } if (drawcursor) { for (c = 0; c < 16; c++) buffer->line[pcjr->displine][(x << 4) + c + 8] ^= 15; } } break; case 0x02: /*320x200x4*/ cols[0] = pcjr->array[0 + 16] + 16; cols[1] = pcjr->array[1 + 16] + 16; cols[2] = pcjr->array[2 + 16] + 16; cols[3] = pcjr->array[3 + 16] + 16; for (x = 0; x < pcjr->crtc[1]; x++) { dat = (pcjr->vram[((pcjr->ma << 1) & mask) + offset] << 8) | pcjr->vram[((pcjr->ma << 1) & mask) + offset + 1]; pcjr->ma++; for (c = 0; c < 8; c++) { buffer->line[pcjr->displine][(x << 4) + (c << 1) + 8] = buffer->line[pcjr->displine][(x << 4) + (c << 1) + 1 + 8] = cols[dat >> 14]; dat <<= 2; } } break; case 0x102: /*640x200x2*/ cols[0] = pcjr->array[0 + 16] + 16; cols[1] = pcjr->array[1 + 16] + 16; for (x = 0; x < pcjr->crtc[1]; x++) { dat = (pcjr->vram[((pcjr->ma << 1) & mask) + offset] << 8) | pcjr->vram[((pcjr->ma << 1) & mask) + offset + 1]; pcjr->ma++; for (c = 0; c < 16; c++) { buffer->line[pcjr->displine][(x << 4) + c + 8] = cols[dat >> 15]; dat <<= 1; } } break; } } else { if (pcjr->array[3] & 4) { if (pcjr->array[0] & 1) hline(buffer, 0, pcjr->displine, (pcjr->crtc[1] << 3) + 16, (pcjr->array[2] & 0xf) + 16); else hline(buffer, 0, pcjr->displine, (pcjr->crtc[1] << 4) + 16, (pcjr->array[2] & 0xf) + 16); } else { // cols[0] = ((pcjr->mode & 0x12) == 0x12) ? 0 : (pcjr->col & 0xf) + 16; cols[0] = pcjr->array[0 + 16] + 16; if (pcjr->array[0] & 1) hline(buffer, 0, pcjr->displine, (pcjr->crtc[1] << 3) + 16, cols[0]); else hline(buffer, 0, pcjr->displine, (pcjr->crtc[1] << 4) + 16, cols[0]); } } if (pcjr->array[0] & 1) x = (pcjr->crtc[1] << 3) + 16; else x = (pcjr->crtc[1] << 4) + 16; if (pcjr->composite) { for (c = 0; c < x; c++) buffer32->line[pcjr->displine][c] = buffer->line[pcjr->displine][c] & 0xf; Composite_Process(pcjr->array[0], 0, x >> 2, buffer32->line[pcjr->displine]); } pcjr->sc = oldsc; if (pcjr->vc == pcjr->crtc[7] && !pcjr->sc) { pcjr->stat |= 8; // printf("VSYNC on %i %i\n",vc,sc); } pcjr->displine++; if (pcjr->displine >= 360) pcjr->displine = 0; } else { pcjr->vidtime += pcjr->dispontime; if (pcjr->dispon) pcjr->stat |= 1; pcjr->linepos = 0; if (pcjr->vsynctime) { pcjr->vsynctime--; if (!pcjr->vsynctime) { pcjr->stat &= ~8; // printf("VSYNC off %i %i\n",vc,sc); } } if (pcjr->sc == (pcjr->crtc[11] & 31) || ((pcjr->crtc[8] & 3) == 3 && pcjr->sc == ((pcjr->crtc[11] & 31) >> 1))) { pcjr->con = 0; pcjr->coff = 1; } if (pcjr->vadj) { pcjr->sc++; pcjr->sc &= 31; pcjr->ma = pcjr->maback; pcjr->vadj--; if (!pcjr->vadj) { pcjr->dispon = 1; pcjr->ma = pcjr->maback = (pcjr->crtc[13] | (pcjr->crtc[12] << 8)) & 0x3fff; pcjr->sc = 0; // printf("Display on!\n"); } } else if (pcjr->sc == pcjr->crtc[9] || ((pcjr->crtc[8] & 3) == 3 && pcjr->sc == (pcjr->crtc[9] >> 1))) { pcjr->maback = pcjr->ma; // con=0; // coff=0; pcjr->sc = 0; oldvc = pcjr->vc; pcjr->vc++; pcjr->vc &= 127; // pclog("VC %i %i\n", pcjr->vc, pcjr->crtc[7]); // printf("VC %i %i %i %i %i\n",vc,crtc[4],crtc[6],crtc[7],pcjr->dispon); if (pcjr->vc == pcjr->crtc[6]) pcjr->dispon = 0; if (oldvc == pcjr->crtc[4]) { // printf("Display over at %i\n",pcjr->displine); pcjr->vc = 0; pcjr->vadj = pcjr->crtc[5]; if (!pcjr->vadj) pcjr->dispon = 1; if (!pcjr->vadj) pcjr->ma = pcjr->maback = (pcjr->crtc[13] | (pcjr->crtc[12] << 8)) & 0x3fff; if ((pcjr->crtc[10] & 0x60) == 0x20) pcjr->cursoron = 0; else pcjr->cursoron = pcjr->blink & 16; // printf("CRTC10 %02X %i\n",crtc[10],cursoron); } if (pcjr->vc == pcjr->crtc[7]) { pcjr->dispon = 0; pcjr->displine = 0; pcjr->vsynctime = 16;//(crtc[3]>>4)+1; picint(1 << 5); // printf("pcjr->vsynctime %i %02X\n",pcjr->vsynctime,crtc[3]); // pcjr->stat|=8; if (pcjr->crtc[7]) { // printf("Lastline %i Firstline %i %i %i %i\n",lastline,firstline,lastline-firstline,crtc[1],xsize); if (pcjr->array[0] & 1) x = (pcjr->crtc[1] << 3) + 16; else x = (pcjr->crtc[1] << 4) + 16; pcjr->lastline++; if (x != xsize || (pcjr->lastline - pcjr->firstline) != ysize) { xsize = x; ysize = pcjr->lastline - pcjr->firstline; // printf("Resize to %i,%i - R1 %i\n",xsize,ysize,crtc[1]); if (xsize < 64) xsize = 656; if (ysize < 32) ysize = 200; updatewindowsize(xsize, (ysize << 1) + 16); } // printf("Blit %i %i\n",firstline,lastline); //printf("Xsize is %i\n",xsize); if (pcjr->composite) video_blit_memtoscreen(0, pcjr->firstline-4, 0, (pcjr->lastline - pcjr->firstline) + 8, xsize, (pcjr->lastline - pcjr->firstline) + 8); else video_blit_memtoscreen_8(0, pcjr->firstline-4, xsize, (pcjr->lastline - pcjr->firstline) + 8); frames++; video_res_x = xsize - 16; video_res_y = ysize; } pcjr->firstline = 1000; pcjr->lastline = 0; pcjr->blink++; } } else { pcjr->sc++; pcjr->sc &= 31; pcjr->ma = pcjr->maback; } if ((pcjr->sc == (pcjr->crtc[10] & 31) || ((pcjr->crtc[8] & 3) == 3 && pcjr->sc == ((pcjr->crtc[10] & 31) >> 1)))) pcjr->con = 1; } } static void *pcjr_video_init() { int display_type; pcjr_t *pcjr = malloc(sizeof(pcjr_t)); memset(pcjr, 0, sizeof(pcjr_t)); display_type = model_get_config_int("display_type"); pcjr->composite = (display_type != PCJR_RGB); pcjr->memctrl = -1; timer_add(pcjr_poll, &pcjr->vidtime, TIMER_ALWAYS_ENABLED, pcjr); mem_mapping_add(&pcjr->mapping, 0xb8000, 0x08000, pcjr_read, NULL, NULL, pcjr_write, NULL, NULL, NULL, 0, pcjr); io_sethandler(0x03d0, 0x0010, pcjr_in, NULL, NULL, pcjr_out, NULL, NULL, pcjr); return pcjr; } static void pcjr_video_close(void *p) { pcjr_t *pcjr = (pcjr_t *)p; free(pcjr); } static void pcjr_speed_changed(void *p) { pcjr_t *pcjr = (pcjr_t *)p; pcjr_recalctimings(pcjr); } device_t pcjr_video_device = { "IBM PCjr (video)", 0, pcjr_video_init, pcjr_video_close, NULL, pcjr_speed_changed, NULL, NULL }; static device_config_t pcjr_config[] = { { .name = "display_type", .description = "Display type", .type = CONFIG_SELECTION, .selection = { { .description = "RGB", .value = PCJR_RGB }, { .description = "Composite", .value = PCJR_COMPOSITE }, { .description = "" } }, .default_int = PCJR_RGB }, { .type = -1 } }; /*This isn't really a device as such - more of a convenient way to hook in the config information*/ device_t pcjr_device = { "IBM PCjr", 0, NULL, NULL, NULL, NULL, NULL, NULL, pcjr_config };