603 lines
28 KiB
C++
603 lines
28 KiB
C++
//////////////////////////////////////////////////////////////////////////
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// Mapper020 Nintendo Disk System(FDS) //
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//////////////////////////////////////////////////////////////////////////
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void Mapper020::Reset()
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{
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irq_type = 0;
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irq_enable = irq_repeat = 0;
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irq_counter = irq_latch = 0;
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irq_occur = 0;
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irq_transfer = 0;
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disk_enable = 0xFF;
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sound_enable = 0xFF;
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block_point = 0;
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block_mode = 0;
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RW_start = 0xFF;
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size_file_data = 0;
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file_amount = 0;
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point = 0;
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first_access = 0;
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disk_eject = 0xFF;
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drive_ready = 0;
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disk_side = 0xFF; // Eject
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disk = disk_w = NULL;
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// Mechanical sound
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sound_startup_flag = 0xFF;
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sound_startup_timer = -1; // stop
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sound_seekend_timer = -1; // stop
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MechanicalSound( MECHANICAL_SOUND_ALLSTOP );
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// ::memset( DRAM, 0xFF, sizeof(DRAM) );
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SetPROM_Bank( 3, DRAM+0x0000, BANKTYPE_DRAM );
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SetPROM_Bank( 4, DRAM+0x2000, BANKTYPE_DRAM );
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SetPROM_Bank( 5, DRAM+0x4000, BANKTYPE_DRAM );
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SetPROM_Bank( 6, DRAM+0x6000, BANKTYPE_DRAM );
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SetPROM_Bank( 7, nes->rom->GetDISKBIOS(), BANKTYPE_ROM );
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SetCRAM_8K_Bank( 0 );
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// デフォルト
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// nes->SetIrqType( NES::IRQ_HSYNC );
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// 帰ってきたマリオブラザーズ
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if( nes->rom->GetMakerID() == 0x01 && nes->rom->GetGameID() == 0x4b4d4152 ) {
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nes->SetRenderMethod( NES::PRE_ALL_RENDER );
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}
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// ガルフォース
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if( nes->rom->GetMakerID() == 0xB6 && nes->rom->GetGameID() == 0x47414C20 ) {
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nes->SetRenderMethod( NES::PRE_ALL_RENDER );
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}
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// ファイアーバム
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if( nes->rom->GetMakerID() == 0xB6 && nes->rom->GetGameID() == 0x46424D20 ) {
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nes->SetRenderMethod( NES::PRE_ALL_RENDER );
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}
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// ３Ｄホットラリー
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if( nes->rom->GetMakerID() == 0x01 && nes->rom->GetGameID() == 0x54445245 ) {
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nes->SetRenderMethod( NES::PRE_ALL_RENDER );
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irq_type = 1; // インチキ
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}
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// タイムツイスト
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if( nes->rom->GetMakerID() == 0x01 && nes->rom->GetGameID() == 0x54540120 ) {
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nes->SetRenderMethod( NES::PRE_ALL_RENDER );
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}
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// バイオミラクルぼくってウパ
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if( nes->rom->GetMakerID() == 0xA4 && nes->rom->GetGameID() == 0x424F4B20 ) {
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nes->SetRenderMethod( NES::PRE_ALL_RENDER );
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}
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// パットパットゴルフ
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if( nes->rom->GetMakerID() == 0x99 && nes->rom->GetGameID() == 0x50504720 ) {
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irq_type = 99;
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}
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// パチもん
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if( nes->rom->GetMakerID() == 0x00 && nes->rom->GetGameID() == 0x00000000 ) {
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::memset( RAM+0x100, 0xFF, 0x100 );
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}
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DEBUGOUT( "MAKER ID=%02X\n", nes->rom->GetMakerID() );
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DEBUGOUT( "GAME ID=%08X\n", nes->rom->GetGameID() );
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nes->apu->SelectExSound( 4 );
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// ExCmdWrite( EXCMDWR_DISKINSERT, 0 );
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// Disk 0, Side Aをセット
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disk = nes->rom->GetPROM()+16+65500*0;
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disk_w = nes->rom->GetDISK()+16+65500*0;
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disk_side = 0;
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disk_eject = 0xFF;
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drive_ready = 0;
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disk_mount_count = 119;
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nes->Command( NES::NESCMD_DISK_THROTTLE_OFF );
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bDiskThrottle = FALSE;
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DiskThrottleTime = 0;
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}
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BYTE Mapper020::ExRead( WORD addr )
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{
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BYTE data = addr>>8;
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switch( addr ) {
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case 0x4030: // Disk I/O status
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data = 0x80;
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data |= (irq_occur && !irq_transfer)?0x01:0x00;
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data |= (irq_occur && irq_transfer)?0x02:0x00;
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irq_occur = 0;
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// Clear Timer IRQ
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nes->cpu->ClrIRQ( IRQ_MAPPER );
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// Clear Disk IRQ
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nes->cpu->ClrIRQ( IRQ_MAPPER2 );
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break;
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case 0x4031: // Disk data read
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if( !RW_mode )
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return 0xFF;
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first_access = 0;
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if( disk ) {
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switch( block_mode ) {
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case BLOCK_VOLUME_LABEL:
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data = disk[block_point];
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if( block_point < SIZE_VOLUME_LABEL ) {
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block_point++;
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} else {
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data = 0;
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}
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return data;
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case BLOCK_FILE_AMOUNT:
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data = disk[ block_point + point ];
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if( block_point < SIZE_FILE_AMOUNT ) {
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block_point++;
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file_amount = data;
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} else {
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data = 0;
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}
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return data;
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case BLOCK_FILE_HEADER:
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data = disk[ block_point + point ];
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if( block_point == 13 )
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size_file_data = data;
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else if( block_point == 14 )
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size_file_data += ((INT)data<<8);
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if( block_point < SIZE_FILE_HEADER ) {
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block_point++;
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} else {
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data = 0;
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}
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return data;
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case BLOCK_FILE_DATA:
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data = disk[ block_point + point ];
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if( block_point < size_file_data + 1 ) {
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block_point++;
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} else {
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data = 0;
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}
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return data;
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}
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} else {
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return 0xFF;
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}
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break;
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case 0x4032: // Disk status
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data = 0x40;
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data |= disk_eject?0x01:0x00;
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data |= disk_eject?0x04:0x00;
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data |= (!disk_eject && disk_motor_mode && !drive_reset)?0x00:0x02;
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break;
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case 0x4033: // External connector data/Battery sense
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data = 0x80;
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break;
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default:
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if( addr >= 0x4040 )
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data = nes->apu->ExRead( addr );
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break;
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}
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//if( addr >= 0x4030 && addr <= 0x4033 ){
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//DEBUGOUT( "R %04X %02X\n", addr, data );
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//}
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return data;
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}
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void Mapper020::ExWrite( WORD addr, BYTE data )
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{
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//DEBUGOUT( "W %04X %02X C:%d\n", addr, data, nes->cpu->GetTotalCycles() );
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switch( addr ) {
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case 0x4020: // IRQ latch low
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irq_latch = (irq_latch&0xFF00)|data;
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break;
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case 0x4021: // IRQ latch high
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irq_latch = (irq_latch&0x00FF)|((WORD)data<<8);
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break;
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case 0x4022: // IRQ control
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irq_repeat = data & 0x01;
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irq_enable = (data & 0x02) && (disk_enable);
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irq_occur = 0;
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if( irq_enable ) {
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irq_counter = irq_latch;
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} else {
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// Clear Timer IRQ
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nes->cpu->ClrIRQ( IRQ_MAPPER );
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}
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break;
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case 0x4023: // 2C33 control
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disk_enable = data & 0x01;
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if( !disk_enable ) {
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irq_enable = 0;
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irq_occur = 0;
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// Clear Timer IRQ
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nes->cpu->ClrIRQ( IRQ_MAPPER );
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// Clear Disk IRQ
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nes->cpu->ClrIRQ( IRQ_MAPPER2 );
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}
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break;
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case 0x4024: // Data write
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// Clear Disk IRQ
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nes->cpu->ClrIRQ( IRQ_MAPPER2 );
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if( RW_mode )
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break;
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if( first_access ) {
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first_access = 0;
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break;
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}
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if( disk ) {
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switch( block_mode ) {
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case BLOCK_VOLUME_LABEL:
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if( block_point < SIZE_VOLUME_LABEL-1 ) {
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disk[ block_point ] = data;
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disk_w[ block_point ] = 0xFF;
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block_point++;
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}
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break;
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case BLOCK_FILE_AMOUNT:
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if( block_point < SIZE_FILE_AMOUNT ) {
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disk[ block_point + point ] = data;
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disk_w[ block_point + point ] = 0xFF;
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block_point++;
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}
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break;
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case BLOCK_FILE_HEADER:
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if( block_point < SIZE_FILE_HEADER ) {
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disk[ block_point + point ] = data;
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disk_w[ block_point + point ] = 0xFF;
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if( block_point == 13 )
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size_file_data = data;
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else if( block_point == 14 )
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size_file_data |= data << 8;
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block_point++;
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}
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break;
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case BLOCK_FILE_DATA:
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if( block_point < size_file_data+1 ) {
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disk[ block_point + point ] = data;
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disk_w[ block_point + point ] = 0xFF;
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block_point++;
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}
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break;
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}
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}
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break;
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case 0x4025: // Disk I/O control
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// 割り込み転送
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irq_transfer = data & 0x80;
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if( !irq_transfer ) {
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nes->cpu->ClrIRQ( IRQ_MAPPER2 );
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}
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if( !RW_start && (data & 0x40) ) {
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block_point = 0;
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switch( block_mode ) {
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case BLOCK_READY:
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block_mode = BLOCK_VOLUME_LABEL;
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point = 0;
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break;
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case BLOCK_VOLUME_LABEL:
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block_mode = BLOCK_FILE_AMOUNT;
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point += SIZE_VOLUME_LABEL;
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break;
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case BLOCK_FILE_AMOUNT:
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block_mode = BLOCK_FILE_HEADER;
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point += SIZE_FILE_AMOUNT;
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break;
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case BLOCK_FILE_HEADER:
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block_mode = BLOCK_FILE_DATA;
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point += SIZE_FILE_HEADER;
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break;
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case BLOCK_FILE_DATA:
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block_mode = BLOCK_FILE_HEADER;
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point += size_file_data+1;
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break;
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}
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// 最初の１回目の書き込みを無視するため
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first_access = 0xFF;
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}
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// 読み書きスタート
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RW_start = data & 0x40;
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// 読み書きモード
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RW_mode = data & 0x04;
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// 読み書きのリセット
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if( data&0x02 ) {
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point = 0;
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block_point = 0;
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block_mode = BLOCK_READY;
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RW_start = 0xFF;
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drive_reset = 0xFF;
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sound_startup_flag = 0;
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sound_startup_timer = -1; // stop
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} else {
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drive_reset = 0;
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if( !sound_startup_flag ) {
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MechanicalSound( MECHANICAL_SOUND_MOTOR_ON );
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sound_startup_flag = 0xFF;
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sound_startup_timer = 40;
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sound_seekend_timer = 60*7;
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}
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}
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// ディスクモーターのコントロール
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disk_motor_mode = data & 0x01;
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if( !(data & 0x01) ) {
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if( sound_seekend_timer >= 0 ) {
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sound_seekend_timer = -1;
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MechanicalSound( MECHANICAL_SOUND_MOTOR_OFF );
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}
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}
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// Mirror
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if( data&0x08 ) SetVRAM_Mirror( VRAM_HMIRROR );
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else SetVRAM_Mirror( VRAM_VMIRROR );
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break;
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case 0x4026: // External connector output/Battery sense
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break;
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default:
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if( addr >= 0x4040 )
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nes->apu->ExWrite( addr, data );
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break;
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}
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}
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void Mapper020::WriteLow( WORD addr, BYTE data )
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{
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DRAM[addr-0x6000] = data;
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}
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void Mapper020::Write( WORD addr, BYTE data )
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{
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if( addr < 0xE000 ) {
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DRAM[addr-0x6000] = data;
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}
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}
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void Mapper020::Clock( INT cycles )
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{
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// Timer IRQ
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if( irq_enable ) {
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if( !irq_type ) {
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irq_counter -= cycles;
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}
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if( irq_counter <= 0 ) {
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//// irq_counter &= 0xFFFF;
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irq_counter += irq_latch;
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if( !irq_occur ) {
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irq_occur = 0xFF;
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if( !irq_repeat ) {
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irq_enable = 0;
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}
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if( irq_type != 99 ) {
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nes->cpu->SetIRQ( IRQ_MAPPER );
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} else {
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nes->cpu->SetIRQ( IRQ_TRIGGER2 );
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}
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}
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}
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if( irq_type ) {
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irq_counter -= cycles;
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}
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}
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}
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void Mapper020::HSync( INT scanline )
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{
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// Disk IRQ
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if( irq_transfer ) {
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nes->cpu->SetIRQ( IRQ_MAPPER2 );
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}
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}
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void Mapper020::VSync()
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{
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if( disk && disk_eject ) {
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if( disk_mount_count > 120 ) {
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disk_eject = 0;
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} else {
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disk_mount_count++;
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}
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}
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// if( disk && (disk_mount_count > 120) ) {
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if( disk ) {
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if( sound_startup_timer > 0 ) {
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sound_startup_timer--;
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} else if( sound_startup_timer == 0 ) {
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sound_startup_timer--;
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MechanicalSound( MECHANICAL_SOUND_BOOT );
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}
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if( sound_seekend_timer > 0 ) {
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sound_seekend_timer--;
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} else if( sound_seekend_timer == 0 ) {
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sound_seekend_timer--;
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MechanicalSound( MECHANICAL_SOUND_MOTOR_OFF );
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MechanicalSound( MECHANICAL_SOUND_SEEKEND );
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sound_startup_flag = 0;
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}
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}
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if( irq_transfer || (disk && disk_mount_count < 120) ) {
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if( DiskThrottleTime > 2 ) {
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bDiskThrottle = TRUE;
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} else {
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bDiskThrottle = FALSE;
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DiskThrottleTime++;
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}
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} else {
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DiskThrottleTime = 0;
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bDiskThrottle = FALSE;
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}
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if( !bDiskThrottle ) {
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nes->Command( NES::NESCMD_DISK_THROTTLE_OFF );
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} else {
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nes->Command( NES::NESCMD_DISK_THROTTLE_ON );
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}
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}
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BYTE Mapper020::ExCmdRead( EXCMDRD cmd )
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{
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BYTE data = 0x00;
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if( cmd == EXCMDRD_DISKACCESS ) {
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if( irq_transfer )
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return 0xFF;
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}
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return data;
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}
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void Mapper020::ExCmdWrite( EXCMDWR cmd, BYTE data )
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{
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switch( cmd ) {
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case EXCMDWR_NONE:
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break;
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case EXCMDWR_DISKINSERT:
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disk = nes->rom->GetPROM()+16+65500*data;
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disk_w = nes->rom->GetDISK()+16+65500*data;
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disk_side = data;
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disk_eject = 0xFF;
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drive_ready = 0;
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disk_mount_count = 0;
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break;
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case EXCMDWR_DISKEJECT:
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disk = NULL; // とりあえず
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disk_w = NULL;
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disk_side = 0xFF;
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disk_eject = 0xFF;
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drive_ready = 0;
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disk_mount_count = 0;
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break;
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}
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}
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void Mapper020::MechanicalSound( INT type )
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{
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switch( type ) {
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case MECHANICAL_SOUND_BOOT:
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// Head start point CAM sound.
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if( Config.sound.bExtraSoundEnable )
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DirectSound.EsfPlay( ESF_DISKSYSTEM_BOOT );
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break;
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case MECHANICAL_SOUND_SEEKEND:
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if( Config.sound.bExtraSoundEnable )
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DirectSound.EsfPlay( ESF_DISKSYSTEM_SEEKEND );
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// Reset or Seekend sound.
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break;
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case MECHANICAL_SOUND_MOTOR_ON:
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if( Config.sound.bExtraSoundEnable )
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DirectSound.EsfPlayLoop( ESF_DISKSYSTEM_MOTOR );
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// Start Motor sound.(loop)
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break;
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case MECHANICAL_SOUND_MOTOR_OFF:
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DirectSound.EsfStop( ESF_DISKSYSTEM_MOTOR );
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// Stop Motor sound.(loop)
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break;
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case MECHANICAL_SOUND_ALLSTOP:
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// Stop sound.
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DirectSound.EsfAllStop();
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break;
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default:
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break;
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}
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}
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void Mapper020::SaveState( LPBYTE p )
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{
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p[0] = irq_enable;
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p[1] = irq_repeat;
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p[2] = irq_occur;
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p[3] = irq_transfer;
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*(INT*)&p[4] = irq_counter;
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*(INT*)&p[8] = irq_latch;
|
||
|
||
p[12] = disk_enable;
|
||
p[13] = sound_enable;
|
||
p[14] = RW_start;
|
||
p[15] = RW_mode;
|
||
p[16] = disk_motor_mode;
|
||
p[17] = disk_eject;
|
||
p[18] = drive_ready;
|
||
p[19] = drive_reset;
|
||
|
||
*(INT*)&p[20] = block_point;
|
||
*(INT*)&p[24] = block_mode;
|
||
*(INT*)&p[28] = size_file_data;
|
||
*(INT*)&p[32] = file_amount;
|
||
*(INT*)&p[36] = point;
|
||
|
||
p[40] = first_access;
|
||
p[41] = disk_side;
|
||
p[42] = disk_mount_count;
|
||
|
||
p[44] = sound_startup_flag;
|
||
*(INT*)&p[48] = sound_startup_timer;
|
||
*(INT*)&p[52] = sound_seekend_timer;
|
||
}
|
||
|
||
void Mapper020::LoadState( LPBYTE p )
|
||
{
|
||
irq_enable = p[0];
|
||
irq_repeat = p[1];
|
||
irq_occur = p[2];
|
||
irq_transfer = p[3];
|
||
|
||
irq_counter = *(INT*)&p[4];
|
||
irq_latch = *(INT*)&p[8];
|
||
|
||
disk_enable = p[12];
|
||
sound_enable = p[13];
|
||
RW_start = p[14];
|
||
RW_mode = p[15];
|
||
disk_motor_mode = p[16];
|
||
disk_eject = p[17];
|
||
drive_ready = p[18];
|
||
drive_reset = p[19];
|
||
|
||
block_point = *(INT*)&p[20];
|
||
block_mode = *(INT*)&p[24];
|
||
size_file_data = *(INT*)&p[28];
|
||
file_amount = *(INT*)&p[32];
|
||
point = *(INT*)&p[36];
|
||
|
||
first_access = p[40];
|
||
disk_side = p[41];
|
||
disk_mount_count= p[42];
|
||
|
||
sound_startup_flag = p[44];
|
||
sound_startup_timer = *(INT*)&p[48];
|
||
sound_seekend_timer = *(INT*)&p[52];
|
||
|
||
if( disk_side != 0xFF ) {
|
||
disk = nes->rom->GetPROM()+sizeof(NESHEADER)+65500*disk_side;
|
||
disk_w = nes->rom->GetDISK()+sizeof(NESHEADER)+65500*disk_side;
|
||
} else {
|
||
disk = NULL;
|
||
disk_w = NULL;
|
||
}
|
||
|
||
// DiskBios Setup(ステートで上書きされている為)
|
||
SetPROM_Bank( 7, nes->rom->GetDISKBIOS(), BANKTYPE_ROM );
|
||
}
|