Subversion Repositories Shiroi

/* $Id: shiroi_romcard_mk_i.c 34 2024-09-01 10:13:47Z nishi $ */
#include "shiroi_romcard_mk_i.h"

#include "shiroi.h"

#include <stdlib.h>
#include <stdio.h>
#include <signal.h>

void shiroi_romcard_mk_i_install(shiroi_t* shiroi, int slot) {
        shiroi->cards[slot].type = SHIROI_ROMCARD_MARK_I;
        shiroi->cards[slot].romcard.data = malloc(1 << 24);
        if(shiroi->cards[slot].romcard.data == NULL) {
                fprintf(stderr, "Could not allocate!\n");
#ifndef __MINGW32__
                raise(SIGABRT);
#endif
        }
        shiroi->cards[slot].romcardptr = &shiroi->cards[slot].romcard;
}

void shiroi_romcard_mk_i_reset(shiroi_t* shiroi, int slot) {}

void shiroi_romcard_mk_i(shiroi_t* shiroi) {
        int i;

        uint16_t io = Z80_GET_ADDR(shiroi->z80_pins);
        uint16_t addr = io & 0xff;
        uint16_t data = (io >> 8) & 0xff;

        for(i = 0; i < 256 / SHIROI_IO_PORTS; i++) {
                if(shiroi->cards[i].type == SHIROI_ROMCARD_MARK_I) {
                        if(shiroi->z80_pins & Z80_RD) {
                                /* I/O Read */
                                if(addr == 16) {
                                        Z80_SET_DATA(shiroi->z80_pins, shiroi->cards[i].romcard.data[shiroi->cards[i].romcard.latch_addr]);
                                } else if(addr == 17) {
                                        Z80_SET_DATA(shiroi->z80_pins, shiroi->cards[i].type);
                                }
                        } else if(shiroi->z80_pins & Z80_WR) {
                                /* I/O Write */
                                if(addr == 15) {
                                        shiroi->cards[i].romcard.latch_addr <<= 8;
                                        shiroi->cards[i].romcard.latch_addr |= data;
                                }
                        }
                }
        }
}

void shiroi_romcard_mk_i_tick(shiroi_t* shiroi) {}