// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** Commodore 1581/1563 Single Disk Drive emulation **********************************************************************/ /* TODO: - drive not ready if ready_r() is connected to CIA */ #include "emu.h" #include "c1581.h" //************************************************************************** // MACROS / CONSTANTS //************************************************************************** #define M6502_TAG "u1" #define M8520_TAG "u5" #define WD1772_TAG "u4" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(C1563, c1563_device, "c1563", "C1563 Disk Drive") DEFINE_DEVICE_TYPE(C1581, c1581_device, "c1581", "C1581 Disk Drive") //------------------------------------------------- // ROM( c1581 ) //------------------------------------------------- ROM_START( c1581 ) ROM_REGION( 0x8000, M6502_TAG, 0 ) ROM_DEFAULT_BIOS("r1") ROM_SYSTEM_BIOS( 0, "beta", "Beta" ) ROMX_LOAD( "beta.u2", 0x0000, 0x8000, CRC(ecc223cd) SHA1(a331d0d46ead1f0275b4ca594f87c6694d9d9594), ROM_BIOS(1) ) ROM_SYSTEM_BIOS( 1, "r1", "Revision 1" ) ROMX_LOAD( "318045-01.u2", 0x0000, 0x8000, CRC(113af078) SHA1(3fc088349ab83e8f5948b7670c866a3c954e6164), ROM_BIOS(2) ) ROM_SYSTEM_BIOS( 2, "r2", "Revision 2" ) ROMX_LOAD( "318045-02.u2", 0x0000, 0x8000, CRC(a9011b84) SHA1(01228eae6f066bd9b7b2b6a7fa3f667e41dad393), ROM_BIOS(3) ) ROM_SYSTEM_BIOS( 3, "jiffydos", "JiffyDOS v6.01" ) ROMX_LOAD( "jiffydos 1581.u2", 0x0000, 0x8000, CRC(98873d0f) SHA1(65bbf2be7bcd5bdcbff609d6c66471ffb9d04bfe), ROM_BIOS(4) ) ROM_END //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const tiny_rom_entry *c1581_device::device_rom_region() const { return ROM_NAME( c1581 ); } //------------------------------------------------- // ROM( c1563 ) //------------------------------------------------- ROM_START( c1563 ) ROM_REGION( 0x8000, M6502_TAG, 0 ) ROM_LOAD( "1563-rom.bin", 0x0000, 0x8000, CRC(1d184687) SHA1(2c5111a9c15be7b7955f6c8775fea25ec10c0ca0) ) ROM_END //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const tiny_rom_entry *c1563_device::device_rom_region() const { return ROM_NAME( c1563 ); } //------------------------------------------------- // ADDRESS_MAP( c1581_mem ) //------------------------------------------------- void c1581_device::c1581_mem(address_map &map) { map(0x0000, 0x1fff).mirror(0x2000).ram(); map(0x4000, 0x400f).mirror(0x1ff0).rw(M8520_TAG, FUNC(mos8520_device::read), FUNC(mos8520_device::write)); map(0x6000, 0x6003).mirror(0x1ffc).rw(WD1772_TAG, FUNC(wd1772_device::read), FUNC(wd1772_device::write)); map(0x8000, 0xffff).rom().region(M6502_TAG, 0); } //------------------------------------------------- // MOS8520_INTERFACE( cia_intf ) //------------------------------------------------- WRITE_LINE_MEMBER( c1581_device::cnt_w ) { m_cnt_out = state; update_iec(); } WRITE_LINE_MEMBER( c1581_device::sp_w ) { m_sp_out = state; update_iec(); } READ8_MEMBER( c1581_device::cia_pa_r ) { /* bit description PA0 PA1 /RDY PA2 PA3 DEV# SEL (SW1) PA4 DEV# SEL (SW1) PA5 PA6 PA7 /DISK CHNG */ uint8_t data = 0; // ready //data |= !m_floppy->ready_r() << 1; // device number data |= ((m_slot->get_address() - 8) & 0x03) << 3; // disk change data |= m_floppy->dskchg_r() << 7; return data; } WRITE8_MEMBER( c1581_device::cia_pa_w ) { /* bit description PA0 SIDE0 PA1 PA2 /MOTOR PA3 PA4 PA5 POWER LED PA6 ACT LED PA7 */ // side select m_floppy->ss_w(BIT(data, 0)); // motor m_floppy->mon_w(BIT(data, 2)); // power led m_leds[LED_POWER] = BIT(data, 5); // activity led m_leds[LED_ACT] = BIT(data, 6); } READ8_MEMBER( c1581_device::cia_pb_r ) { /* bit description PB0 DATA IN PB1 PB2 CLK IN PB3 PB4 PB5 PB6 /WPRT PB7 ATN IN */ uint8_t data; // data in data = !m_bus->data_r(); // clock in data |= !m_bus->clk_r() << 2; // write protect data |= !m_floppy->wpt_r() << 6; // attention in data |= !m_bus->atn_r() << 7; return data; } WRITE8_MEMBER( c1581_device::cia_pb_w ) { /* bit description PB0 PB1 DATA OUT PB2 PB3 CLK OUT PB4 ATN ACK PB5 FAST SER DIR PB6 PB7 */ // data out m_data_out = BIT(data, 1); // clock out m_bus->clk_w(this, !BIT(data, 3)); // attention acknowledge m_atn_ack = BIT(data, 4); // fast serial direction m_fast_ser_dir = BIT(data, 5); update_iec(); } //------------------------------------------------- // SLOT_INTERFACE( c1581_floppies ) //------------------------------------------------- static void c1581_floppies(device_slot_interface &device) { device.option_add("35dd", FLOPPY_35_DD); // Chinon F-354-E } //------------------------------------------------- // FLOPPY_FORMATS( c1581_device::floppy_formats ) //------------------------------------------------- FLOPPY_FORMATS_MEMBER( c1581_device::floppy_formats ) FLOPPY_D81_FORMAT FLOPPY_FORMATS_END //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- MACHINE_CONFIG_START(c1581_device::device_add_mconfig) MCFG_DEVICE_ADD(M6502_TAG, M6502, XTAL(16'000'000)/8) MCFG_DEVICE_PROGRAM_MAP(c1581_mem) MCFG_DEVICE_ADD(M8520_TAG, MOS8520, XTAL(16'000'000)/8) MCFG_MOS6526_IRQ_CALLBACK(INPUTLINE(M6502_TAG, INPUT_LINE_IRQ0)) MCFG_MOS6526_CNT_CALLBACK(WRITELINE(*this, c1581_device, cnt_w)) MCFG_MOS6526_SP_CALLBACK(WRITELINE(*this, c1581_device, sp_w)) MCFG_MOS6526_PA_INPUT_CALLBACK(READ8(*this, c1581_device, cia_pa_r)) MCFG_MOS6526_PA_OUTPUT_CALLBACK(WRITE8(*this, c1581_device, cia_pa_w)) MCFG_MOS6526_PB_INPUT_CALLBACK(READ8(*this, c1581_device, cia_pb_r)) MCFG_MOS6526_PB_OUTPUT_CALLBACK(WRITE8(*this, c1581_device, cia_pb_w)) MCFG_WD1772_ADD(WD1772_TAG, XTAL(16'000'000)/2) MCFG_FLOPPY_DRIVE_ADD_FIXED(WD1772_TAG":0", c1581_floppies, "35dd", c1581_device::floppy_formats) MACHINE_CONFIG_END //------------------------------------------------- // INPUT_PORTS( c1581 ) //------------------------------------------------- static INPUT_PORTS_START( c1581 ) PORT_START("ADDRESS") PORT_DIPNAME( 0x03, 0x00, "Device Address" ) PORT_DIPSETTING( 0x00, "8" ) PORT_DIPSETTING( 0x01, "9" ) PORT_DIPSETTING( 0x02, "10" ) PORT_DIPSETTING( 0x03, "11" ) INPUT_PORTS_END //------------------------------------------------- // input_ports - device-specific input ports //------------------------------------------------- ioport_constructor c1581_device::device_input_ports() const { return INPUT_PORTS_NAME( c1581 ); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // c1581_device - constructor //------------------------------------------------- c1581_device::c1581_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, type, tag, owner, clock), device_cbm_iec_interface(mconfig, *this), m_maincpu(*this, M6502_TAG), m_cia(*this, M8520_TAG), m_fdc(*this, WD1772_TAG), m_floppy(*this, WD1772_TAG":0:35dd"), m_address(*this, "ADDRESS"), m_leds(*this, "led%u", 0U), m_data_out(0), m_atn_ack(0), m_fast_ser_dir(0), m_sp_out(1), m_cnt_out(1) { } c1581_device::c1581_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : c1581_device(mconfig, C1581, tag, owner, clock) { } //------------------------------------------------- // c1563_device - constructor //------------------------------------------------- c1563_device::c1563_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : c1581_device(mconfig, C1563, tag, owner, clock) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void c1581_device::device_start() { m_leds.resolve(); // state saving save_item(NAME(m_data_out)); save_item(NAME(m_atn_ack)); save_item(NAME(m_fast_ser_dir)); save_item(NAME(m_sp_out)); save_item(NAME(m_cnt_out)); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void c1581_device::device_reset() { m_maincpu->reset(); m_cia->reset(); m_fdc->reset(); m_fdc->set_floppy(m_floppy); m_fdc->dden_w(0); m_sp_out = 1; m_cnt_out = 1; update_iec(); } //------------------------------------------------- // cbm_iec_srq - //------------------------------------------------- void c1581_device::cbm_iec_srq(int state) { update_iec(); } //------------------------------------------------- // cbm_iec_atn - //------------------------------------------------- void c1581_device::cbm_iec_atn(int state) { update_iec(); } //------------------------------------------------- // cbm_iec_data - //------------------------------------------------- void c1581_device::cbm_iec_data(int state) { update_iec(); } //------------------------------------------------- // cbm_iec_reset - //------------------------------------------------- void c1581_device::cbm_iec_reset(int state) { if (!state) { device_reset(); } } //------------------------------------------------- // update_iec - //------------------------------------------------- void c1581_device::update_iec() { m_cia->cnt_w(m_fast_ser_dir || m_bus->srq_r()); m_cia->sp_w(m_fast_ser_dir || m_bus->data_r()); int atn = m_bus->atn_r(); m_cia->flag_w(atn); // serial data int data = !m_data_out && !(m_atn_ack && !atn); if (m_fast_ser_dir) data &= m_sp_out; m_bus->data_w(this, data); // fast clock int srq = 1; if (m_fast_ser_dir) srq &= m_cnt_out; m_bus->srq_w(this, srq); }