学研TV BOYエミュレータをつくる　その５

ソフトは6種類(各3,800円)が発売されたそうです。
市街戦200X年（ふつうに遊べる！）
ミスターボム（ふつうに遊べる！）
エキサイトインベーダー（ゲーム開始直後フリーズ）
ロボタンウォーズ（ゲーム開始後キー入力できない）
地対空大作戦（サウンドが鳴らない）
フロッガー（タイトルでフリーズ）
ソースコード差分は以下になります。
takeda-toshiya.my.coocan.jp
/*
    GAKKEN TV BOY Emulator 'yaTVBOY'

    Author : tanam
    Date   : 2020.06.13

    [ memory ]
*/

#include "memory.h"

#define SET_BANK(s, e, w, r) { \
    int sb = (s) >> 10, eb = (e) >> 10; \
    for(int i = sb; i <= eb; i++) { \
        if((w) == wdmy) { \
            wbank[i] = wdmy; \
        } else { \
            wbank[i] = (w) + 0x400 * (i - sb); \
        } \
        if((r) == rdmy) { \
            rbank[i] = rdmy; \
        } else { \
            rbank[i] = (r) + 0x400 * (i - sb); \
        } \
    } \
}

void MEMORY::initialize()
{
    memset(rom, 0xff, sizeof(rom));
    memset(rdmy, 0xff, sizeof(rdmy));   
    // set memory map
    SET_BANK(0x0000, 0x0fff, ram,  ram );
    SET_BANK(0x1000, 0x1fff, vram, vram);
    SET_BANK(0x2000, 0xefff, wdmy, rdmy);
    SET_BANK(0xf000, 0xffff, wdmy, rom );
    // register event
//  register_event_by_clock(this, 0, 256, true, NULL);
    register_event_by_clock(this, 0, 4096, true, NULL);
    event = false;
    inserted = false;
}

void MEMORY::reset()
{
    memset(ram, 0, sizeof(ram));
    for (int i=0; i<sizeof(vram); i++) {
        vram[i]=rand() % 256;
    }
    d_vdp->write_signal(SIG_MC6847_AS,     0x00, 0x08);
    d_vdp->write_signal(SIG_MC6847_AG,     0x10, 0x10);
    d_vdp->write_signal(SIG_MC6847_CSS,    0x20, 0x20);
    d_vdp->write_signal(SIG_MC6847_GM,     0x00, 0x02);
    d_vdp->write_signal(SIG_MC6847_GM,     0x01, 0x01);
    d_vdp->write_signal(SIG_MC6847_INTEXT, 0x00, 0x04);
    shot1 = shot2 = up = down = left = right = 0;
}

void MEMORY::write_data8(uint32_t addr, uint32_t data)
{
    addr &= 0xffff;
    if(addr >= 0x80 && addr < 0x100) {
        d_cpu->ram[addr-0x80]=data;
    }
    if(addr == 0x2000) {
        d_vdp->write_signal(SIG_MC6847_AS,     data, 0x08);
        d_vdp->write_signal(SIG_MC6847_AG,     data, 0x10);
        d_vdp->write_signal(SIG_MC6847_CSS,    data, 0x20);
        d_vdp->write_signal(SIG_MC6847_GM,     data << 1, 0x02);
        d_vdp->write_signal(SIG_MC6847_GM,     data >> 1, 0x01);
        d_vdp->write_signal(SIG_MC6847_INTEXT, data, 0x04);
        return;
    }
    wbank[addr >> 10][addr & 0x3ff] = data;
}

uint32_t MEMORY::read_data8(uint32_t addr)
{
    addr &= 0xffff;
    if(addr >= 0x80 && addr < 0x100) {
        return d_cpu->ram[addr-0x80];
    }
    return rbank[addr >> 10][addr & 0x3ff];
}

void MEMORY::write_signal(int id, uint32_t data, uint32_t mask)
{
    d_cpu->write_signal(SIG_MC6801_PORT_2, 0x1E, 0x1E);
    if (shot2==1 && (d_cpu->port[0].wreg & 0x01)==1) {
        d_cpu->write_signal(SIG_MC6801_PORT_2, 0x00, 0x04);
    }
    if (shot1==1 && (d_cpu->port[0].wreg & 0x01)==1) {
        d_cpu->write_signal(SIG_MC6801_PORT_2, 0x00, 0x02);
    }

//  if (event) return; // speed down
    
    if (down==1 && (d_cpu->port[0].wreg & 0x01)==0) {
         d_cpu->write_signal(SIG_MC6801_PORT_2, 0x00, 0x04);
        // frogger
        if (rom[0x0ff4]==0xfa && rom[0x0ff5]==0xd7) down =0;
    }
    if (up==1 && (d_cpu->port[0].wreg & 0x01)==0) {
        d_cpu->write_signal(SIG_MC6801_PORT_2, 0x00, 0x02);
        // frogger
        if (rom[0x0ff4]==0xfa && rom[0x0ff5]==0xd7) up =0;
    }
    if (left==1 && (d_cpu->port[0].wreg & 0x01)==0) {
        d_cpu->write_signal(SIG_MC6801_PORT_2, 0x00, 0x08);
        // frogger
        if (rom[0x0ff4]==0xfa && rom[0x0ff5]==0xd7) left =0;
    }
    if (right==1 && (d_cpu->port[0].wreg & 0x01)==0) {
        d_cpu->write_signal(SIG_MC6801_PORT_2, 0x00, 0x10);
        // frogger
        if (rom[0x0ff4]==0xfa && rom[0x0ff5]==0xd7) right =0;
    }
}

void MEMORY::event_callback(int event_id, int err)
{
    if (event)  {
        d_cpu->write_signal(SIG_CPU_IRQ, 1, 1);
        event = false;
    } else {
        d_cpu->write_signal(SIG_CPU_IRQ, 0, 1);
        event = true;
    }
}

void MEMORY::key_down(int code)
{
    if (code==0x20) {
        shot1 =1;
    }
    if (code==0x11) {
        shot2 =1;
    }
    if (code==0x25) {
        left =1;
    }
    if (code==0x26) {
        up =1;
    }
    if (code==0x27) {
        right =1;
    }
    if (code==0x28) {
        down =1;
    }
}

void MEMORY::key_up(int code)
{
    if (code==0x20) {
        shot1 =0;
    }
    if (code==0x11) {
        shot2 =0;
    }
    if (code==0x25) {
        left =0;
    }
    if (code==0x26) {
        up =0;
    }
    if (code==0x27) {
        right =0;
    }
    if (code==0x28) {
        down =0;
    }
}

void MEMORY::open_cart(const _TCHAR* file_path)
{
    FILEIO* fio = new FILEIO();
    if(fio->Fopen(file_path, FILEIO_READ_BINARY)) {
        fio->Fread(rom, sizeof(rom), 1);
        fio->Fclose();
        inserted = true;
    }
    delete fio;
}

void MEMORY::close_cart()
{
    memset(rom, 0xff, sizeof(rom));
    inserted = false;
}

#define STATE_VERSION   1

bool MEMORY::process_state(FILEIO* state_fio, bool loading)
{
    if(!state_fio->StateCheckUint32(STATE_VERSION)) {
        return false;
    }
    if(!state_fio->StateCheckInt32(this_device_id)) {
        return false;
    }
    state_fio->StateArray(ram, sizeof(ram), 1);
    state_fio->StateArray(vram, sizeof(vram), 1);
    return true;
}