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nishi |
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/* $Id: shiroi_video_mk_i.c 11 2024-08-29 02:49:47Z nishi $ */
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#include "shiroi_video_mk_i.h"
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#include "shiroi.h"
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#include "tms9918util.h"
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#include <stdlib.h>
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void shiroi_video_mk_i_install(shiroi_t* shiroi, int slot) {
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shiroi->cards[slot].type = SHIROI_VIDEO_MARK_I;
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shiroi->cards[slot].videoptr = &shiroi->cards[slot].video;
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shiroi->cards[slot].video.width = TMS9918_PIXELS_X;
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shiroi->cards[slot].video.height = TMS9918_PIXELS_Y;
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shiroi->cards[slot].video.tick = 0;
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shiroi->cards[slot].video.vdp = vrEmuTms9918New();
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int x, y;
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for(y = 0; y < TMS9918_PIXELS_Y; y++) {
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for(x = 0; x < TMS9918_PIXELS_X; x++) {
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shiroi->cards[slot].video.fb[y * TMS9918_PIXELS_X + x] = 0;
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}
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}
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}
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void shiroi_video_mk_i_reset(shiroi_t* shiroi, int slot) {
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vrEmuTms9918Reset(shiroi->cards[slot].video.vdp);
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shiroi->cards[slot].video.tick = 0;
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int y, x;
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for(y = 0; y < shiroi->cards[slot].video.height; y++) {
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for(x = 0; x < shiroi->cards[slot].video.width; x++) {
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shiroi->cards[slot].video.fb[y * shiroi->cards[slot].video.width + x] = 0x000000ff;
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}
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}
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int i;
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int addr;
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addr = 0 | 0x4000;
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vrEmuTms9918WriteAddr(shiroi->cards[slot].video.vdp, (addr & 0xff00) >> 8);
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vrEmuTms9918WriteAddr(shiroi->cards[slot].video.vdp, (addr & 0xff));
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for(i = 0; i < 0xffff; i++) {
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vrEmuTms9918WriteData(shiroi->cards[slot].video.vdp, 0);
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}
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}
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void shiroi_video_mk_i(shiroi_t* shiroi) {
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int i;
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uint16_t io = Z80_GET_ADDR(shiroi->z80_pins);
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uint16_t addr = io & 0xff;
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uint16_t data = (io >> 8) & 0xff;
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for(i = 0; i < 256 / SHIROI_IO_PORTS; i++) {
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if(shiroi->cards[i].type == SHIROI_VIDEO_MARK_I) {
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if(shiroi->z80_pins & Z80_RD) {
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/* I/O Read */
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if(addr == 1) {
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Z80_SET_DATA(shiroi->z80_pins, vrEmuTms9918ReadData(shiroi->cards[i].video.vdp));
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} else if(addr == 2) {
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Z80_SET_DATA(shiroi->z80_pins, shiroi->cards[i].type);
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}
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} else if(shiroi->z80_pins & Z80_WR) {
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/* I/O Write */
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if(addr == 0) {
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vrEmuTms9918WriteAddr(shiroi->cards[i].video.vdp, data);
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} else if(addr == 1) {
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vrEmuTms9918WriteData(shiroi->cards[i].video.vdp, data);
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}
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}
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}
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}
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}
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void shiroi_video_mk_i_tick(shiroi_t* shiroi) {
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uint8_t scanline[TMS9918_PIXELS_X];
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int i, y, x;
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for(i = 0; i < 256 / SHIROI_IO_PORTS; i++) {
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if(shiroi->cards[i].type == SHIROI_VIDEO_MARK_I) {
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shiroi->cards[i].video.tick++;
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if(shiroi->cards[i].video.tick == 256) {
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shiroi->cards[i].video.tick = 0;
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for(y = 0; y < TMS9918_PIXELS_Y; y++) {
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vrEmuTms9918ScanLine(shiroi->cards[i].video.vdp, y, scanline);
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for(x = 0; x < TMS9918_PIXELS_X; x++) {
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shiroi->cards[i].video.fb[y * TMS9918_PIXELS_X + x] = vrEmuTms9918Palette[scanline[x]];
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}
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}
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}
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}
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}
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}
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