// license:MAME // copyright-holders:Robbbert /*************************************************************************** Ampro Little Z80 Board 2013-09-02 Skeleton driver. Chips: Z80A @4MHz, Z80CTC, Z80DART, WD1770/2, NCR5380. Crystal: 16 MHz This is a complete CP/M single-board computer that could be mounted on top of a standard 13cm floppy drive. You needed to supply your own power supply and serial terminal. The later versions included a SCSI chip (NCR5380) enabling the use of a hard drive of up to 88MB. ToDo: - (maybe) add scsi interface - Add printer ****************************************************************************/ #include "bus/rs232/rs232.h" #include "cpu/z80/z80.h" #include "cpu/z80/z80daisy.h" #include "machine/z80ctc.h" #include "machine/z80dart.h" #include "machine/wd_fdc.h" class ampro_state : public driver_device { public: ampro_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_dart(*this, "z80dart") , m_ctc (*this, "z80ctc") , m_fdc (*this, "fdc") , m_floppy0(*this, "fdc:0") { } DECLARE_DRIVER_INIT(ampro); DECLARE_MACHINE_RESET(ampro); TIMER_DEVICE_CALLBACK_MEMBER(ctc_tick); DECLARE_WRITE_LINE_MEMBER(ctc_z0_w); DECLARE_WRITE8_MEMBER(port00_w); DECLARE_READ8_MEMBER(io_r); DECLARE_WRITE8_MEMBER(io_w); private: required_device m_maincpu; required_device m_dart; required_device m_ctc; required_device m_fdc; required_device m_floppy0; }; /* d0..d3 Drive select 0-3 (we only emulate 1 drive) d4 Side select 0=side0 d5 /DDEN d6 Banking 0=rom d7 FDC master clock 0=8MHz 1=16MHz (for 20cm disks, not emulated) */ WRITE8_MEMBER( ampro_state::port00_w ) { membank("bankr0")->set_entry(BIT(data, 6)); m_fdc->dden_w(BIT(data, 5)); floppy_image_device *floppy = NULL; if (BIT(data, 0)) floppy = m_floppy0->get_device(); m_fdc->set_floppy(floppy); if (floppy) floppy->ss_w(BIT(data, 4)); } READ8_MEMBER( ampro_state::io_r ) { if (offset < 0x40) return m_ctc->read(space, offset>>4); else return m_dart->ba_cd_r(space, offset>>2); } WRITE8_MEMBER( ampro_state::io_w ) { if (offset < 0x40) m_ctc->write(space, offset>>4, data); else m_dart->ba_cd_w(space, offset>>2, data); } static ADDRESS_MAP_START(ampro_mem, AS_PROGRAM, 8, ampro_state) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x0000, 0x0fff) AM_READ_BANK("bankr0") AM_WRITE_BANK("bankw0") AM_RANGE(0x1000, 0xffff) AM_RAM ADDRESS_MAP_END static ADDRESS_MAP_START(ampro_io, AS_IO, 8, ampro_state) ADDRESS_MAP_UNMAP_HIGH ADDRESS_MAP_GLOBAL_MASK(0xff) AM_RANGE(0x00, 0x00) AM_WRITE(port00_w) // system //AM_RANGE(0x01, 0x01) AM_WRITE(port01_w) // printer data //AM_RANGE(0x02, 0x03) AM_WRITE(port02_w) // printer strobe //AM_RANGE(0x20, 0x27) AM_READWRITE() // scsi chip //AM_RANGE(0x28, 0x28) AM_WRITE(port28_w) // scsi control //AM_RANGE(0x29, 0x29) AM_READ(port29_r) // ID port AM_RANGE(0x40, 0x8f) AM_READWRITE(io_r,io_w) AM_RANGE(0xc0, 0xc3) AM_DEVWRITE("fdc", wd1772_t, write) AM_RANGE(0xc4, 0xc7) AM_DEVREAD("fdc", wd1772_t, read) ADDRESS_MAP_END static const z80_daisy_config daisy_chain_intf[] = { { "z80ctc" }, { "z80dart" }, { NULL } }; // Baud rate generator. All inputs are 2MHz. TIMER_DEVICE_CALLBACK_MEMBER( ampro_state::ctc_tick ) { m_ctc->trg0(1); m_ctc->trg0(0); m_ctc->trg1(1); m_ctc->trg1(0); } WRITE_LINE_MEMBER( ampro_state::ctc_z0_w ) { m_dart->rxca_w(state); m_dart->txca_w(state); } static SLOT_INTERFACE_START( ampro_floppies ) SLOT_INTERFACE( "525dd", FLOPPY_525_DD ) SLOT_INTERFACE_END /* Input ports */ static INPUT_PORTS_START( ampro ) INPUT_PORTS_END MACHINE_RESET_MEMBER( ampro_state, ampro ) { membank("bankr0")->set_entry(0); // point at rom membank("bankw0")->set_entry(0); // always write to ram } DRIVER_INIT_MEMBER( ampro_state, ampro ) { UINT8 *main = memregion("maincpu")->base(); membank("bankr0")->configure_entry(1, &main[0x0000]); membank("bankr0")->configure_entry(0, &main[0x10000]); membank("bankw0")->configure_entry(0, &main[0x0000]); } static MACHINE_CONFIG_START( ampro, ampro_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu",Z80, XTAL_16MHz / 4) MCFG_CPU_PROGRAM_MAP(ampro_mem) MCFG_CPU_IO_MAP(ampro_io) MCFG_CPU_CONFIG(daisy_chain_intf) MCFG_MACHINE_RESET_OVERRIDE(ampro_state, ampro) /* Devices */ MCFG_DEVICE_ADD("z80ctc", Z80CTC, XTAL_16MHz / 4) MCFG_Z80CTC_INTR_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) MCFG_Z80CTC_ZC0_CB(WRITELINE(ampro_state, ctc_z0_w)) // Z80DART Ch A, SIO Ch A MCFG_Z80CTC_ZC1_CB(DEVWRITELINE("z80dart", z80dart_device, rxtxcb_w)) // SIO Ch B MCFG_Z80DART_ADD("z80dart", XTAL_16MHz / 4, 0, 0, 0, 0 ) MCFG_Z80DART_OUT_TXDA_CB(DEVWRITELINE("rs232", rs232_port_device, write_txd)) MCFG_Z80DART_OUT_DTRA_CB(DEVWRITELINE("rs232", rs232_port_device, write_dtr)) MCFG_Z80DART_OUT_RTSA_CB(DEVWRITELINE("rs232", rs232_port_device, write_rts)) MCFG_Z80DART_OUT_INT_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "terminal") MCFG_RS232_RXD_HANDLER(DEVWRITELINE("z80dart", z80dart_device, rxa_w)) MCFG_TIMER_DRIVER_ADD_PERIODIC("ctc_tick", ampro_state, ctc_tick, attotime::from_hz(XTAL_16MHz / 8)) MCFG_WD1772x_ADD("fdc", XTAL_16MHz / 2) MCFG_FLOPPY_DRIVE_ADD("fdc:0", ampro_floppies, "525dd", floppy_image_device::default_floppy_formats) MACHINE_CONFIG_END /* ROM definition */ ROM_START( ampro ) ROM_REGION( 0x11000, "maincpu", ROMREGION_ERASEFF ) ROM_SYSTEM_BIOS( 0, "mntr", "Monitor") ROMX_LOAD( "mntr", 0x10000, 0x1000, CRC(d59d0909) SHA1(936410f414b1e71445253840eea0045545e4ff0b), ROM_BIOS(1)) ROM_SYSTEM_BIOS( 1, "boot", "Boot") ROMX_LOAD( "boot", 0x10000, 0x1000, CRC(b3524046) SHA1(5466f7d28c1a04cfbf328095cb35ad1525e91f44), ROM_BIOS(2)) ROM_SYSTEM_BIOS( 2, "scsi", "SCSI Boot") ROMX_LOAD( "scsi", 0x10000, 0x1000, CRC(8eb20e5d) SHA1(0ab1ff65cf6d3c1a713a8ac5c1ee4c662ac3da0c), ROM_BIOS(3)) ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ COMP( 1980, ampro, 0, 0, ampro, ampro, ampro_state, ampro, "Ampro", "Little Z80 Board", GAME_NO_SOUND_HW)