Initial submission of the PCem-Experimental source code.
This commit is contained in:
OBattler
726
src/vid_tandy.c
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726
src/vid_tandy.c
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@@ -0,0 +1,726 @@
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#include <stdlib.h>
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#include <math.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 "timer.h"
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#include "video.h"
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#include "vid_tandy.h"
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static int i_filt[8],q_filt[8];
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typedef struct tandy_t
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{
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mem_mapping_t mapping;
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mem_mapping_t ram_mapping;
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uint8_t crtc[32];
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int crtcreg;
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int array_index;
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uint8_t array[32];
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int memctrl;//=-1;
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uint32_t base;
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uint8_t mode, col;
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uint8_t stat;
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uint8_t *vram, *b8000;
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uint32_t b8000_mask;
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int linepos, displine;
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int sc, vc;
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int dispon;
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int con, coff, cursoron, blink;
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int vsynctime, vadj;
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uint16_t ma, maback;
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int dispontime, dispofftime, vidtime;
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int firstline, lastline;
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} tandy_t;
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static uint8_t crtcmask[32] =
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{
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0xff, 0xff, 0xff, 0xff, 0x7f, 0x1f, 0x7f, 0x7f, 0xf3, 0x1f, 0x7f, 0x1f, 0x3f, 0xff, 0x3f, 0xff,
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0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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};
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void tandy_recalcaddress(tandy_t *tandy);
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void tandy_recalctimings(tandy_t *tandy);
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void tandy_out(uint16_t addr, uint8_t val, void *p)
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{
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tandy_t *tandy = (tandy_t *)p;
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uint8_t old;
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// pclog("Tandy OUT %04X %02X\n",addr,val);
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switch (addr)
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{
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case 0x3d4:
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tandy->crtcreg = val & 0x1f;
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return;
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case 0x3d5:
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old = tandy->crtc[tandy->crtcreg];
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tandy->crtc[tandy->crtcreg] = val & crtcmask[tandy->crtcreg];
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if (old != val)
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{
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if (tandy->crtcreg < 0xe || tandy->crtcreg > 0x10)
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{
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fullchange = changeframecount;
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tandy_recalctimings(tandy);
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}
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}
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return;
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case 0x3d8:
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tandy->mode = val;
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return;
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case 0x3d9:
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tandy->col = val;
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return;
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case 0x3da:
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tandy->array_index = val & 0x1f;
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break;
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case 0x3de:
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if (tandy->array_index & 16)
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val &= 0xf;
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tandy->array[tandy->array_index & 0x1f] = val;
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break;
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case 0x3df:
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tandy->memctrl = val;
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tandy_recalcaddress(tandy);
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break;
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case 0xa0:
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mem_mapping_set_addr(&tandy->ram_mapping, ((val >> 1) & 7) * 128 * 1024, 0x20000);
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tandy_recalcaddress(tandy);
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break;
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}
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}
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uint8_t tandy_in(uint16_t addr, void *p)
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{
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tandy_t *tandy = (tandy_t *)p;
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// if (addr!=0x3DA) pclog("Tandy IN %04X\n",addr);
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switch (addr)
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{
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case 0x3d4:
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return tandy->crtcreg;
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case 0x3d5:
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return tandy->crtc[tandy->crtcreg];
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case 0x3da:
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return tandy->stat;
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}
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return 0xFF;
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}
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void tandy_recalcaddress(tandy_t *tandy)
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{
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if ((tandy->memctrl & 0xc0) == 0xc0)
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{
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tandy->vram = &ram[((tandy->memctrl & 0x06) << 14) + tandy->base];
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tandy->b8000 = &ram[((tandy->memctrl & 0x30) << 11) + tandy->base];
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tandy->b8000_mask = 0x7fff;
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// printf("VRAM at %05X B8000 at %05X\n",((tandy->memctrl&0x6)<<14)+tandy->base,((tandy->memctrl&0x30)<<11)+tandy->base);
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}
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else
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{
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tandy->vram = &ram[((tandy->memctrl & 0x07) << 14) + tandy->base];
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tandy->b8000 = &ram[((tandy->memctrl & 0x38) << 11) + tandy->base];
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tandy->b8000_mask = 0x3fff;
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// printf("VRAM at %05X B8000 at %05X\n",((tandy->memctrl&0x7)<<14)+tandy->base,((tandy->memctrl&0x38)<<11)+tandy->base);
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}
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}
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void tandy_ram_write(uint32_t addr, uint8_t val, void *p)
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{
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tandy_t *tandy = (tandy_t *)p;
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// pclog("Tandy RAM write %05X %02X %04X:%04X\n",addr,val,CS,pc);
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ram[tandy->base + (addr & 0x1ffff)] = val;
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}
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uint8_t tandy_ram_read(uint32_t addr, void *p)
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{
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tandy_t *tandy = (tandy_t *)p;
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// pclog("Tandy RAM read %05X %02X %04X:%04X\n",addr,ram[tandy->base + (addr & 0x1ffff)],CS,pc);
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return ram[tandy->base + (addr & 0x1ffff)];
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}
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void tandy_write(uint32_t addr, uint8_t val, void *p)
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{
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tandy_t *tandy = (tandy_t *)p;
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if (tandy->memctrl == -1)
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return;
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egawrites++;
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// pclog("Tandy VRAM write %05X %02X %04X:%04X %04X:%04X\n",addr,val,CS,pc,DS,SI);
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tandy->b8000[addr & tandy->b8000_mask] = val;
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}
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uint8_t tandy_read(uint32_t addr, void *p)
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{
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tandy_t *tandy = (tandy_t *)p;
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if (tandy->memctrl == -1)
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return 0xff;
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egareads++;
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// pclog("Tandy VRAM read %05X %02X %04X:%04X\n",addr,tandy->b8000[addr&0x7FFF],CS,pc);
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return tandy->b8000[addr & tandy->b8000_mask];
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}
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void tandy_recalctimings(tandy_t *tandy)
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{
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double _dispontime, _dispofftime, disptime;
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if (tandy->mode & 1)
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{
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disptime = tandy->crtc[0] + 1;
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_dispontime = tandy->crtc[1];
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}
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else
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{
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disptime = (tandy->crtc[0] + 1) << 1;
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_dispontime = tandy->crtc[1] << 1;
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}
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_dispofftime = disptime - _dispontime;
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_dispontime *= CGACONST;
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_dispofftime *= CGACONST;
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tandy->dispontime = (int)(_dispontime * (1 << TIMER_SHIFT));
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tandy->dispofftime = (int)(_dispofftime * (1 << TIMER_SHIFT));
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}
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static int ntsc_col[8][8]=
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{
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{0,0,0,0,0,0,0,0}, /*Black*/
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{0,0,1,1,1,1,0,0}, /*Blue*/
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{1,0,0,0,0,1,1,1}, /*Green*/
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{0,0,0,0,1,1,1,1}, /*Cyan*/
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{1,1,1,1,0,0,0,0}, /*Red*/
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{0,1,1,1,1,0,0,0}, /*Magenta*/
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{1,1,0,0,0,0,1,1}, /*Yellow*/
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{1,1,1,1,1,1,1,1} /*White*/
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};
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/*static int cga4pal[8][4]=
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{
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{0,2,4,6},{0,3,5,7},{0,3,4,7},{0,3,4,7},
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{0,10,12,14},{0,11,13,15},{0,11,12,15},{0,11,12,15}
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};*/
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void tandy_poll(void *p)
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{
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// int *cgapal=cga4pal[((tandy->col&0x10)>>2)|((cgamode&4)>>1)|((cgacol&0x20)>>5)];
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tandy_t *tandy = (tandy_t *)p;
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uint16_t ca = (tandy->crtc[15] | (tandy->crtc[14] << 8)) & 0x3fff;
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int drawcursor;
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int x, c;
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int oldvc;
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uint8_t chr, attr;
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uint16_t dat;
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int cols[4];
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int col;
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int oldsc;
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int y_buf[8] = {0, 0, 0, 0, 0, 0, 0, 0}, y_val, y_tot;
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int i_buf[8] = {0, 0, 0, 0, 0, 0, 0, 0}, i_val, i_tot;
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int q_buf[8] = {0, 0, 0, 0, 0, 0, 0, 0}, q_val, q_tot;
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int r, g, b;
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if (!tandy->linepos)
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{
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// cgapal[0]=tandy->col&15;
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// printf("Firstline %i Lastline %i tandy->displine %i\n",firstline,lastline,tandy->displine);
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tandy->vidtime += tandy->dispofftime;
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tandy->stat |= 1;
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tandy->linepos = 1;
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oldsc = tandy->sc;
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if ((tandy->crtc[8] & 3) == 3)
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tandy->sc = (tandy->sc << 1) & 7;
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if (tandy->dispon)
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{
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if (tandy->displine < tandy->firstline)
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{
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tandy->firstline = tandy->displine;
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// printf("Firstline %i\n",firstline);
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}
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tandy->lastline = tandy->displine;
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cols[0] = (tandy->array[2] & 0xf) + 16;
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for (c = 0; c < 8; c++)
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{
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if (tandy->array[3] & 4)
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{
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buffer->line[tandy->displine][c] = cols[0];
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if (tandy->mode & 1) buffer->line[tandy->displine][c + (tandy->crtc[1] << 3) + 8] = cols[0];
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else buffer->line[tandy->displine][c + (tandy->crtc[1] << 4) + 8] = cols[0];
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}
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else if ((tandy->mode & 0x12) == 0x12)
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{
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buffer->line[tandy->displine][c] = 0;
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if (tandy->mode & 1) buffer->line[tandy->displine][c + (tandy->crtc[1] << 3) + 8] = 0;
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else buffer->line[tandy->displine][c + (tandy->crtc[1] << 4) + 8] = 0;
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}
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else
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{
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buffer->line[tandy->displine][c] = (tandy->col & 15) + 16;
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if (tandy->mode & 1) buffer->line[tandy->displine][c + (tandy->crtc[1] << 3) + 8] = (tandy->col & 15) + 16;
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else buffer->line[tandy->displine][c + (tandy->crtc[1] << 4) + 8] = (tandy->col & 15) + 16;
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}
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}
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// printf("X %i %i\n",c+(crtc[1]<<4)+8,c+(crtc[1]<<3)+8);
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// printf("Drawing %i %i %i\n",tandy->displine,vc,sc);
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if ((tandy->array[3] & 0x10) && (tandy->mode & 1)) /*320x200x16*/
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{
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for (x = 0; x < tandy->crtc[1]; x++)
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{
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dat = (tandy->vram[((tandy->ma << 1) & 0x1fff) + ((tandy->sc & 3) * 0x2000)] << 8) |
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tandy->vram[((tandy->ma << 1) & 0x1fff) + ((tandy->sc & 3) * 0x2000) + 1];
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tandy->ma++;
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buffer->line[tandy->displine][(x << 3) + 8] =
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buffer->line[tandy->displine][(x << 3) + 9] = tandy->array[((dat >> 12) & tandy->array[1]) + 16] + 16;
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buffer->line[tandy->displine][(x << 3) + 10] =
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buffer->line[tandy->displine][(x << 3) + 11] = tandy->array[((dat >> 8) & tandy->array[1]) + 16] + 16;
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buffer->line[tandy->displine][(x << 3) + 12] =
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buffer->line[tandy->displine][(x << 3) + 13] = tandy->array[((dat >> 4) & tandy->array[1]) + 16] + 16;
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buffer->line[tandy->displine][(x << 3) + 14] =
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buffer->line[tandy->displine][(x << 3) + 15] = tandy->array[(dat & tandy->array[1]) + 16] + 16;
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}
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}
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else if (tandy->array[3] & 0x10) /*160x200x16*/
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{
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for (x = 0; x < tandy->crtc[1]; x++)
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{
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dat = (tandy->vram[((tandy->ma << 1) & 0x1fff) + ((tandy->sc & 3) * 0x2000)] << 8) |
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tandy->vram[((tandy->ma << 1) & 0x1fff) + ((tandy->sc & 3) * 0x2000) + 1];
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tandy->ma++;
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buffer->line[tandy->displine][(x << 4) + 8] =
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buffer->line[tandy->displine][(x << 4) + 9] =
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buffer->line[tandy->displine][(x << 4) + 10] =
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buffer->line[tandy->displine][(x << 4) + 11] = tandy->array[((dat >> 12) & tandy->array[1]) + 16] + 16;
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buffer->line[tandy->displine][(x << 4) + 12] =
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buffer->line[tandy->displine][(x << 4) + 13] =
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buffer->line[tandy->displine][(x << 4) + 14] =
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buffer->line[tandy->displine][(x << 4) + 15] = tandy->array[((dat >> 8) & tandy->array[1]) + 16] + 16;
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buffer->line[tandy->displine][(x << 4) + 16] =
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buffer->line[tandy->displine][(x << 4) + 17] =
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buffer->line[tandy->displine][(x << 4) + 18] =
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buffer->line[tandy->displine][(x << 4) + 19] = tandy->array[((dat >> 4) & tandy->array[1]) + 16] + 16;
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buffer->line[tandy->displine][(x << 4) + 20] =
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buffer->line[tandy->displine][(x << 4) + 21] =
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buffer->line[tandy->displine][(x << 4) + 22] =
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buffer->line[tandy->displine][(x << 4) + 23] = tandy->array[(dat & tandy->array[1]) + 16] + 16;
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}
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}
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else if (tandy->array[3] & 0x08) /*640x200x4 - this implementation is a complete guess!*/
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{
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for (x = 0; x < tandy->crtc[1]; x++)
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{
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dat = (tandy->vram[((tandy->ma << 1) & 0x1fff) + ((tandy->sc & 3) * 0x2000)] << 8) |
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tandy->vram[((tandy->ma << 1) & 0x1fff) + ((tandy->sc & 3) * 0x2000) + 1];
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tandy->ma++;
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for (c = 0; c < 8; c++)
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{
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chr = (dat >> 7) & 1;
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chr |= ((dat >> 14) & 2);
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buffer->line[tandy->displine][(x << 3) + 8 + c] = tandy->array[(chr & tandy->array[1]) + 16] + 16;
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dat <<= 1;
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}
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}
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}
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else if (tandy->mode & 1)
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{
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for (x = 0; x < tandy->crtc[1]; x++)
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{
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chr = tandy->vram[ (tandy->ma << 1) & 0x3fff];
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attr = tandy->vram[((tandy->ma << 1) + 1) & 0x3fff];
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drawcursor = ((tandy->ma == ca) && tandy->con && tandy->cursoron);
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if (tandy->mode & 0x20)
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{
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cols[1] = tandy->array[ ((attr & 15) & tandy->array[1]) + 16] + 16;
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cols[0] = tandy->array[(((attr >> 4) & 7) & tandy->array[1]) + 16] + 16;
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if ((tandy->blink & 16) && (attr & 0x80) && !drawcursor)
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cols[1] = cols[0];
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}
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else
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{
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cols[1] = tandy->array[((attr & 15) & tandy->array[1]) + 16] + 16;
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cols[0] = tandy->array[((attr >> 4) & tandy->array[1]) + 16] + 16;
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}
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if (tandy->sc & 8)
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{
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for (c = 0; c < 8; c++)
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buffer->line[tandy->displine][(x << 3) + c + 8] = cols[0];
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}
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else
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{
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for (c = 0; c < 8; c++)
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buffer->line[tandy->displine][(x << 3) + c + 8] = cols[(fontdat[chr][tandy->sc & 7] & (1 << (c ^ 7))) ? 1 : 0];
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}
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// if (!((ma^(crtc[15]|(crtc[14]<<8)))&0x3FFF)) printf("Cursor match! %04X\n",ma);
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if (drawcursor)
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{
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for (c = 0; c < 8; c++)
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buffer->line[tandy->displine][(x << 3) + c + 8] ^= 15;
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}
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tandy->ma++;
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}
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}
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else if (!(tandy->mode & 2))
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{
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for (x = 0; x < tandy->crtc[1]; x++)
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{
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chr = tandy->vram[ (tandy->ma << 1) & 0x3fff];
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attr = tandy->vram[((tandy->ma << 1) + 1) & 0x3fff];
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drawcursor = ((tandy->ma == ca) && tandy->con && tandy->cursoron);
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if (tandy->mode & 0x20)
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{
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cols[1] = tandy->array[ ((attr & 15) & tandy->array[1]) + 16] + 16;
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cols[0] = tandy->array[(((attr >> 4) & 7) & tandy->array[1]) + 16] + 16;
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if ((tandy->blink & 16) && (attr & 0x80) && !drawcursor)
|
||||
cols[1] = cols[0];
|
||||
}
|
||||
else
|
||||
{
|
||||
cols[1] = tandy->array[((attr & 15) & tandy->array[1]) + 16] + 16;
|
||||
cols[0] = tandy->array[((attr >> 4) & tandy->array[1]) + 16] + 16;
|
||||
}
|
||||
tandy->ma++;
|
||||
if (tandy->sc & 8)
|
||||
{
|
||||
for (c = 0; c < 8; c++)
|
||||
buffer->line[tandy->displine][(x << 4) + (c << 1) + 8] =
|
||||
buffer->line[tandy->displine][(x << 4) + (c << 1) + 1 + 8] = cols[0];
|
||||
}
|
||||
else
|
||||
{
|
||||
for (c = 0; c < 8; c++)
|
||||
buffer->line[tandy->displine][(x << 4) + (c << 1) + 8] =
|
||||
buffer->line[tandy->displine][(x << 4) + (c << 1) + 1 + 8] = cols[(fontdat[chr][tandy->sc & 7] & (1 << (c ^ 7))) ? 1 : 0];
|
||||
}
|
||||
if (drawcursor)
|
||||
{
|
||||
for (c = 0; c < 16; c++)
|
||||
buffer->line[tandy->displine][(x << 4) + c + 8] ^= 15;
|
||||
}
|
||||
}
|
||||
}
|
||||
else if (!(tandy->mode& 16))
|
||||
{
|
||||
cols[0] = (tandy->col & 15) | 16;
|
||||
col = (tandy->col & 16) ? 24 : 16;
|
||||
if (tandy->mode & 4)
|
||||
{
|
||||
cols[1] = col | 3;
|
||||
cols[2] = col | 4;
|
||||
cols[3] = col | 7;
|
||||
}
|
||||
else if (tandy->col & 32)
|
||||
{
|
||||
cols[1] = col | 3;
|
||||
cols[2] = col | 5;
|
||||
cols[3] = col | 7;
|
||||
}
|
||||
else
|
||||
{
|
||||
cols[1] = col | 2;
|
||||
cols[2] = col | 4;
|
||||
cols[3] = col | 6;
|
||||
}
|
||||
for (x = 0; x < tandy->crtc[1]; x++)
|
||||
{
|
||||
dat = (tandy->vram[((tandy->ma << 1) & 0x1fff) + ((tandy->sc & 1) * 0x2000)] << 8) |
|
||||
tandy->vram[((tandy->ma << 1) & 0x1fff) + ((tandy->sc & 1) * 0x2000) + 1];
|
||||
tandy->ma++;
|
||||
for (c = 0; c < 8; c++)
|
||||
{
|
||||
buffer->line[tandy->displine][(x << 4) + (c << 1) + 8] =
|
||||
buffer->line[tandy->displine][(x << 4) + (c << 1) + 1 + 8] = cols[dat >> 14];
|
||||
dat <<= 2;
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
cols[0] = 0;
|
||||
cols[1] = tandy->array[(tandy->col & tandy->array[1]) + 16] + 16;
|
||||
for (x = 0; x < tandy->crtc[1]; x++)
|
||||
{
|
||||
dat = (tandy->vram[((tandy->ma << 1) & 0x1fff) + ((tandy->sc & 1) * 0x2000)] << 8) |
|
||||
tandy->vram[((tandy->ma << 1) & 0x1fff) + ((tandy->sc & 1) * 0x2000) + 1];
|
||||
tandy->ma++;
|
||||
for (c = 0; c < 16; c++)
|
||||
{
|
||||
buffer->line[tandy->displine][(x << 4) + c + 8] = cols[dat >> 15];
|
||||
dat <<= 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
if (tandy->array[3] & 4)
|
||||
{
|
||||
if (tandy->mode & 1) hline(buffer, 0, tandy->displine, (tandy->crtc[1] << 3) + 16, (tandy->array[2] & 0xf) + 16);
|
||||
else hline(buffer, 0, tandy->displine, (tandy->crtc[1] << 4) + 16, (tandy->array[2] & 0xf) + 16);
|
||||
}
|
||||
else
|
||||
{
|
||||
cols[0] = ((tandy->mode & 0x12) == 0x12) ? 0 : (tandy->col & 0xf) + 16;
|
||||
if (tandy->mode & 1) hline(buffer, 0, tandy->displine, (tandy->crtc[1] << 3) + 16, cols[0]);
|
||||
else hline(buffer, 0, tandy->displine, (tandy->crtc[1] << 4) + 16, cols[0]);
|
||||
}
|
||||
}
|
||||
if (tandy->mode & 1) x = (tandy->crtc[1] << 3) + 16;
|
||||
else x = (tandy->crtc[1] << 4) + 16;
|
||||
if (cga_comp)
|
||||
{
|
||||
for (c = 0; c < x; c++)
|
||||
{
|
||||
y_buf[(c << 1) & 6] = ntsc_col[buffer->line[tandy->displine][c] & 7][(c << 1) & 6] ? 0x6000 : 0;
|
||||
y_buf[(c << 1) & 6] += (buffer->line[tandy->displine][c] & 8) ? 0x3000 : 0;
|
||||
i_buf[(c << 1) & 6] = y_buf[(c << 1) & 6] * i_filt[(c << 1) & 6];
|
||||
q_buf[(c << 1) & 6] = y_buf[(c << 1) & 6] * q_filt[(c << 1) & 6];
|
||||
y_tot = y_buf[0] + y_buf[1] + y_buf[2] + y_buf[3] + y_buf[4] + y_buf[5] + y_buf[6] + y_buf[7];
|
||||
i_tot = i_buf[0] + i_buf[1] + i_buf[2] + i_buf[3] + i_buf[4] + i_buf[5] + i_buf[6] + i_buf[7];
|
||||
q_tot = q_buf[0] + q_buf[1] + q_buf[2] + q_buf[3] + q_buf[4] + q_buf[5] + q_buf[6] + q_buf[7];
|
||||
|
||||
y_val = y_tot >> 10;
|
||||
if (y_val > 255) y_val = 255;
|
||||
y_val <<= 16;
|
||||
i_val = i_tot >> 12;
|
||||
if (i_val > 39041) i_val = 39041;
|
||||
if (i_val < -39041) i_val = -39041;
|
||||
q_val = q_tot >> 12;
|
||||
if (q_val > 34249) q_val = 34249;
|
||||
if (q_val < -34249) q_val = -34249;
|
||||
|
||||
r = (y_val + 249*i_val + 159*q_val) >> 16;
|
||||
g = (y_val - 70*i_val - 166*q_val) >> 16;
|
||||
b = (y_val - 283*i_val + 436*q_val) >> 16;
|
||||
|
||||
y_buf[((c << 1) & 6) + 1] = ntsc_col[buffer->line[tandy->displine][c] & 7][((c << 1) & 6) + 1] ? 0x6000 : 0;
|
||||
y_buf[((c << 1) & 6) + 1] += (buffer->line[tandy->displine][c] & 8) ? 0x3000 : 0;
|
||||
i_buf[((c << 1) & 6) + 1] = y_buf[((c << 1) & 6) + 1] * i_filt[((c << 1) & 6) + 1];
|
||||
q_buf[((c << 1) & 6) + 1] = y_buf[((c << 1) & 6) + 1] * q_filt[((c << 1) & 6) + 1];
|
||||
y_tot = y_buf[0] + y_buf[1] + y_buf[2] + y_buf[3] + y_buf[4] + y_buf[5] + y_buf[6] + y_buf[7];
|
||||
i_tot = i_buf[0] + i_buf[1] + i_buf[2] + i_buf[3] + i_buf[4] + i_buf[5] + i_buf[6] + i_buf[7];
|
||||
q_tot = q_buf[0] + q_buf[1] + q_buf[2] + q_buf[3] + q_buf[4] + q_buf[5] + q_buf[6] + q_buf[7];
|
||||
|
||||
y_val = y_tot >> 10;
|
||||
if (y_val > 255) y_val = 255;
|
||||
y_val <<= 16;
|
||||
i_val = i_tot >> 12;
|
||||
if (i_val > 39041) i_val = 39041;
|
||||
if (i_val < -39041) i_val = -39041;
|
||||
q_val = q_tot >> 12;
|
||||
if (q_val > 34249) q_val = 34249;
|
||||
if (q_val < -34249) q_val = -34249;
|
||||
|
||||
r = (y_val + 249*i_val + 159*q_val) >> 16;
|
||||
g = (y_val - 70*i_val - 166*q_val) >> 16;
|
||||
b = (y_val - 283*i_val + 436*q_val) >> 16;
|
||||
if (r > 511) r = 511;
|
||||
if (g > 511) g = 511;
|
||||
if (b > 511) b = 511;
|
||||
|
||||
((uint32_t *)buffer32->line[tandy->displine])[c] = makecol32(r / 2, g / 2, b / 2);
|
||||
}
|
||||
}
|
||||
tandy->sc = oldsc;
|
||||
if (tandy->vc == tandy->crtc[7] && !tandy->sc)
|
||||
{
|
||||
tandy->stat |= 8;
|
||||
// printf("VSYNC on %i %i\n",vc,sc);
|
||||
}
|
||||
tandy->displine++;
|
||||
if (tandy->displine >= 360)
|
||||
tandy->displine = 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
tandy->vidtime += tandy->dispontime;
|
||||
if (tandy->dispon)
|
||||
tandy->stat &= ~1;
|
||||
tandy->linepos = 0;
|
||||
if (tandy->vsynctime)
|
||||
{
|
||||
tandy->vsynctime--;
|
||||
if (!tandy->vsynctime)
|
||||
{
|
||||
tandy->stat &= ~8;
|
||||
// printf("VSYNC off %i %i\n",vc,sc);
|
||||
}
|
||||
}
|
||||
if (tandy->sc == (tandy->crtc[11] & 31) || ((tandy->crtc[8] & 3) == 3 && tandy->sc == ((tandy->crtc[11] & 31) >> 1)))
|
||||
{
|
||||
tandy->con = 0;
|
||||
tandy->coff = 1;
|
||||
}
|
||||
if (tandy->vadj)
|
||||
{
|
||||
tandy->sc++;
|
||||
tandy->sc &= 31;
|
||||
tandy->ma = tandy->maback;
|
||||
tandy->vadj--;
|
||||
if (!tandy->vadj)
|
||||
{
|
||||
tandy->dispon = 1;
|
||||
tandy->ma = tandy->maback = (tandy->crtc[13] | (tandy->crtc[12] << 8)) & 0x3fff;
|
||||
tandy->sc = 0;
|
||||
// printf("Display on!\n");
|
||||
}
|
||||
}
|
||||
else if (tandy->sc == tandy->crtc[9] || ((tandy->crtc[8] & 3) == 3 && tandy->sc == (tandy->crtc[9] >> 1)))
|
||||
{
|
||||
tandy->maback = tandy->ma;
|
||||
// con=0;
|
||||
// coff=0;
|
||||
tandy->sc = 0;
|
||||
oldvc = tandy->vc;
|
||||
tandy->vc++;
|
||||
tandy->vc &= 127;
|
||||
// printf("VC %i %i %i %i %i\n",vc,crtc[4],crtc[6],crtc[7],tandy->dispon);
|
||||
if (tandy->vc == tandy->crtc[6])
|
||||
tandy->dispon = 0;
|
||||
if (oldvc == tandy->crtc[4])
|
||||
{
|
||||
// printf("Display over at %i\n",tandy->displine);
|
||||
tandy->vc = 0;
|
||||
tandy->vadj = tandy->crtc[5];
|
||||
if (!tandy->vadj)
|
||||
tandy->dispon = 1;
|
||||
if (!tandy->vadj)
|
||||
tandy->ma = tandy->maback = (tandy->crtc[13] | (tandy->crtc[12] << 8)) & 0x3fff;
|
||||
if ((tandy->crtc[10] & 0x60) == 0x20) tandy->cursoron = 0;
|
||||
else tandy->cursoron = tandy->blink & 16;
|
||||
// printf("CRTC10 %02X %i\n",crtc[10],cursoron);
|
||||
}
|
||||
if (tandy->vc == tandy->crtc[7])
|
||||
{
|
||||
tandy->dispon = 0;
|
||||
tandy->displine = 0;
|
||||
tandy->vsynctime = 16;//(crtc[3]>>4)+1;
|
||||
// printf("tandy->vsynctime %i %02X\n",tandy->vsynctime,crtc[3]);
|
||||
// tandy->stat|=8;
|
||||
if (tandy->crtc[7])
|
||||
{
|
||||
// printf("Lastline %i Firstline %i %i %i %i\n",lastline,firstline,lastline-firstline,crtc[1],xsize);
|
||||
if (tandy->mode & 1) x = (tandy->crtc[1] << 3) + 16;
|
||||
else x = (tandy->crtc[1] << 4) + 16;
|
||||
tandy->lastline++;
|
||||
if (x != xsize || (tandy->lastline - tandy->firstline) != ysize)
|
||||
{
|
||||
xsize = x;
|
||||
ysize = tandy->lastline - tandy->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);
|
||||
startblit();
|
||||
if (cga_comp)
|
||||
video_blit_memtoscreen(0, tandy->firstline-4, 0, (tandy->lastline - tandy->firstline) + 8, xsize, (tandy->lastline - tandy->firstline) + 8);
|
||||
else
|
||||
video_blit_memtoscreen_8(0, tandy->firstline-4, xsize, (tandy->lastline - tandy->firstline) + 8);
|
||||
endblit();
|
||||
frames++;
|
||||
video_res_x = xsize - 16;
|
||||
video_res_y = ysize;
|
||||
if ((tandy->array[3] & 0x10) && (tandy->mode & 1)) /*320x200x16*/
|
||||
{
|
||||
video_res_x /= 2;
|
||||
video_bpp = 4;
|
||||
}
|
||||
else if (tandy->array[3] & 0x10) /*160x200x16*/
|
||||
{
|
||||
video_res_x /= 4;
|
||||
video_bpp = 4;
|
||||
}
|
||||
else if (tandy->array[3] & 0x08) /*640x200x4 - this implementation is a complete guess!*/
|
||||
video_bpp = 2;
|
||||
else if (tandy->mode & 1)
|
||||
{
|
||||
video_res_x /= 8;
|
||||
video_res_y /= tandy->crtc[9] + 1;
|
||||
video_bpp = 0;
|
||||
}
|
||||
else if (!(tandy->mode & 2))
|
||||
{
|
||||
video_res_x /= 16;
|
||||
video_res_y /= tandy->crtc[9] + 1;
|
||||
video_bpp = 0;
|
||||
}
|
||||
else if (!(tandy->mode & 16))
|
||||
{
|
||||
video_res_x /= 2;
|
||||
video_bpp = 2;
|
||||
}
|
||||
else
|
||||
video_bpp = 1;
|
||||
}
|
||||
tandy->firstline = 1000;
|
||||
tandy->lastline = 0;
|
||||
tandy->blink++;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
tandy->sc++;
|
||||
tandy->sc &= 31;
|
||||
tandy->ma = tandy->maback;
|
||||
}
|
||||
if ((tandy->sc == (tandy->crtc[10] & 31) || ((tandy->crtc[8] & 3) == 3 && tandy->sc == ((tandy->crtc[10] & 31) >> 1))))
|
||||
tandy->con = 1;
|
||||
}
|
||||
}
|
||||
|
||||
void *tandy_init()
|
||||
{
|
||||
int c;
|
||||
int tandy_tint = -2;
|
||||
tandy_t *tandy = malloc(sizeof(tandy_t));
|
||||
memset(tandy, 0, sizeof(tandy_t));
|
||||
|
||||
tandy->memctrl = -1;
|
||||
tandy->base = (mem_size - 128) * 1024;
|
||||
|
||||
for (c = 0; c < 8; c++)
|
||||
{
|
||||
i_filt[c] = 512.0 * cos((3.14 * (tandy_tint + c * 4) / 16.0) - 33.0 / 180.0);
|
||||
q_filt[c] = 512.0 * sin((3.14 * (tandy_tint + c * 4) / 16.0) - 33.0 / 180.0);
|
||||
}
|
||||
timer_add(tandy_poll, &tandy->vidtime, TIMER_ALWAYS_ENABLED, tandy);
|
||||
mem_mapping_add(&tandy->mapping, 0xb8000, 0x08000, tandy_read, NULL, NULL, tandy_write, NULL, NULL, NULL, 0, tandy);
|
||||
mem_mapping_add(&tandy->ram_mapping, 0x80000, 0x20000, tandy_ram_read, NULL, NULL, tandy_ram_write, NULL, NULL, NULL, 0, tandy);
|
||||
/*Base 128k mapping is controlled via port 0xA0, so we remove it from the main mapping*/
|
||||
mem_mapping_set_addr(&ram_low_mapping, 0, (mem_size - 128) * 1024);
|
||||
io_sethandler(0x03d0, 0x0010, tandy_in, NULL, NULL, tandy_out, NULL, NULL, tandy);
|
||||
io_sethandler(0x00a0, 0x0001, tandy_in, NULL, NULL, tandy_out, NULL, NULL, tandy);
|
||||
tandy->b8000_mask = 0x3fff;
|
||||
|
||||
overscan_x = overscan_y = 16;
|
||||
|
||||
return tandy;
|
||||
}
|
||||
|
||||
void tandy_close(void *p)
|
||||
{
|
||||
tandy_t *tandy = (tandy_t *)p;
|
||||
|
||||
free(tandy);
|
||||
}
|
||||
|
||||
void tandy_speed_changed(void *p)
|
||||
{
|
||||
tandy_t *tandy = (tandy_t *)p;
|
||||
|
||||
tandy_recalctimings(tandy);
|
||||
}
|
||||
|
||||
device_t tandy_device =
|
||||
{
|
||||
"Tandy 1000 (video)",
|
||||
0,
|
||||
tandy_init,
|
||||
tandy_close,
|
||||
NULL,
|
||||
tandy_speed_changed,
|
||||
NULL,
|
||||
NULL
|
||||
};
|
||||
Reference in New Issue
Block a user