// license:BSD-3-Clause // copyright-holders:Curt Coder, Robbbert /******************************************************************************************************************** 2013-07-31 Skeleton Driver [Curt Coder] 2013-07-31 Connected to terminal [Robbbert] 2016-07-11 After 10 seconds the monitor program will start [Robbbert] Commands: (no spaces allowed) B - Boot the disk D - Dump memory to screen F - Fill Memory G - Go To H - Help P - Alter port values S - Alter memory The photos show 3 boards: - A scsi board (all 74-series TTL) - CPU board (64k dynamic RAM, Z80A CPU, 2x Z80CTC, 2x Z80SIO/0, MB8877A, Z80DMA, 4x MC1488, 4x MC1489, XTALS 1.8432MHz and 24MHz) - ADES board (Adaptec Inc AIC-100, AIC-250, AIC-300, Intel D8086AH, unknown crystal) Both roms contain Z80 code. ********************************************************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" #include "cpu/z80/z80daisy.h" #include "machine/z80ctc.h" #include "machine/z80sio.h" #include "machine/clock.h" #include "bus/rs232/rs232.h" class dsb46_state : public driver_device { public: dsb46_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") { } DECLARE_WRITE8_MEMBER(port1a_w); DECLARE_DRIVER_INIT(dsb46); DECLARE_MACHINE_RESET(dsb46); void dsb46(machine_config &config); void dsb46_io(address_map &map); void dsb46_mem(address_map &map); private: required_device m_maincpu; }; ADDRESS_MAP_START(dsb46_state::dsb46_mem) AM_RANGE(0x0000, 0x07ff) AM_READ_BANK("read") AM_WRITE_BANK("write") AM_RANGE(0x0800, 0xffff) AM_RAM ADDRESS_MAP_END ADDRESS_MAP_START(dsb46_state::dsb46_io) ADDRESS_MAP_GLOBAL_MASK(0xff) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x00, 0x03) AM_DEVREADWRITE("sio", z80sio_device, ba_cd_r, ba_cd_w) AM_RANGE(0x08, 0x0b) AM_DEVREADWRITE("ctc1", z80ctc_device, read, write) AM_RANGE(0x1a, 0x1a) AM_WRITE(port1a_w) //AM_RANGE(0x10, 0x10) disk related //AM_RANGE(0x14, 0x14) ?? (read after CTC1 TRG3) //AM_RANGE(0x18, 0x18) ?? //AM_RANGE(0x1c, 0x1c) disk data //AM_RANGE(0x1d, 0x1d) disk status (FF = no fdc) ADDRESS_MAP_END static INPUT_PORTS_START( dsb46 ) INPUT_PORTS_END DRIVER_INIT_MEMBER(dsb46_state, dsb46) { uint8_t *RAM = memregion("maincpu")->base(); membank("read")->configure_entry(0, &RAM[0x10000]); membank("read")->configure_entry(1, &RAM[0x00000]); membank("write")->configure_entry(0, &RAM[0x00000]); } MACHINE_RESET_MEMBER( dsb46_state,dsb46 ) { membank("read")->set_entry(0); membank("write")->set_entry(0); m_maincpu->reset(); } WRITE8_MEMBER( dsb46_state::port1a_w ) { membank("read")->set_entry(data & 1); } static const z80_daisy_config daisy_chain[] = { { "ctc1" }, { "sio" }, { nullptr } }; MACHINE_CONFIG_START(dsb46_state::dsb46) // basic machine hardware MCFG_CPU_ADD("maincpu", Z80, XTAL(24'000'000) / 6) MCFG_CPU_PROGRAM_MAP(dsb46_mem) MCFG_CPU_IO_MAP(dsb46_io) MCFG_Z80_DAISY_CHAIN(daisy_chain) MCFG_MACHINE_RESET_OVERRIDE(dsb46_state, dsb46) /* video hardware */ MCFG_DEVICE_ADD("ctc_clock", CLOCK, XTAL(1'843'200)) MCFG_CLOCK_SIGNAL_HANDLER(DEVWRITELINE("ctc1", z80ctc_device, trg0)) MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("ctc1", z80ctc_device, trg2)) /* Devices */ MCFG_DEVICE_ADD("sio", Z80SIO, XTAL(24'000'000) / 6) MCFG_Z80SIO_OUT_INT_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) MCFG_Z80SIO_OUT_TXDA_CB(DEVWRITELINE("rs232", rs232_port_device, write_txd)) MCFG_Z80SIO_OUT_DTRA_CB(DEVWRITELINE("rs232", rs232_port_device, write_dtr)) MCFG_Z80SIO_OUT_RTSA_CB(DEVWRITELINE("rs232", rs232_port_device, write_rts)) MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "terminal") MCFG_RS232_RXD_HANDLER(DEVWRITELINE("sio", z80sio_device, rxa_w)) MCFG_RS232_CTS_HANDLER(DEVWRITELINE("sio", z80sio_device, ctsa_w)) MCFG_DEVICE_ADD("ctc1", Z80CTC, XTAL(24'000'000) / 6) MCFG_Z80CTC_INTR_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) MCFG_Z80CTC_ZC0_CB(DEVWRITELINE("sio", z80sio_device, rxca_w)) MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("sio", z80sio_device, txca_w)) MCFG_Z80CTC_ZC2_CB(DEVWRITELINE("sio", z80sio_device, rxcb_w)) MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("sio", z80sio_device, txcb_w)) MACHINE_CONFIG_END ROM_START( dsb46 ) ROM_REGION( 0x10800, "maincpu", 0 ) ROM_LOAD( "1538a.bin", 0x10000, 0x800, CRC(65b3e26e) SHA1(afe1f03f266b7d13fdb1f1bc6762df5e0aa5c764) ) ROM_REGION( 0x4000, "ades", 0 ) ROM_LOAD( "ades.bin", 0x0000, 0x4000, CRC(d374abf0) SHA1(331f51a2bb81375aeffbe63c1ebc1d7cd779b9c3) ) ROM_END COMP( 198?, dsb46, 0, 0, dsb46, dsb46, dsb46_state, dsb46, "Davidge", "DSB-4/6", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW )