// license:MAME // copyright-holders:Robbbert /*************************************************************************** Skeleton driver for 68k Single Board Computer 29/03/2011 http://www.kmitl.ac.th/~kswichit/68k/68k.html TODO: - Add RTC (type DS12887) All of the address and i/o decoding is done by a pair of XC9536 mask-programmed custom devices. There are some chips used for unclear purposes (GPI, GPO, LCD). This computer has no sound, and no facility for saving or loading programs. When started, press ? key for a list of commands. Has 1MB of flash (which is actually just 12k of program), and 1MB of RAM. Memory map should probably be corrected. ****************************************************************************/ #include "bus/rs232/rs232.h" #include "cpu/m68000/m68000.h" #include "machine/6850acia.h" #include "machine/clock.h" class c68ksbc_state : public driver_device { public: c68ksbc_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_maincpu(*this, "maincpu"), m_acia(*this, "acia") { } DECLARE_WRITE_LINE_MEMBER(write_acia_clock); private: required_device m_maincpu; required_device m_acia; }; static ADDRESS_MAP_START(c68ksbc_mem, AS_PROGRAM, 16, c68ksbc_state) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x000000, 0x002fff) AM_ROM AM_RANGE(0x003000, 0x5fffff) AM_RAM AM_RANGE(0x600000, 0x600001) AM_DEVREADWRITE8("acia", acia6850_device, status_r, control_w, 0x00ff) AM_RANGE(0x600002, 0x600003) AM_DEVREADWRITE8("acia", acia6850_device, data_r, data_w, 0x00ff) ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START( c68ksbc ) INPUT_PORTS_END WRITE_LINE_MEMBER(c68ksbc_state::write_acia_clock) { m_acia->write_txc(state); m_acia->write_rxc(state); } static MACHINE_CONFIG_START( c68ksbc, c68ksbc_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu", M68000, 8000000) // text says 8MHz, schematic says 10MHz MCFG_CPU_PROGRAM_MAP(c68ksbc_mem) MCFG_DEVICE_ADD("acia", ACIA6850, 0) MCFG_ACIA6850_TXD_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_txd)) MCFG_ACIA6850_RTS_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_rts)) MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "terminal") MCFG_RS232_RXD_HANDLER(DEVWRITELINE("acia", acia6850_device, write_rxd)) MCFG_RS232_CTS_HANDLER(DEVWRITELINE("acia", acia6850_device, write_cts)) MCFG_DEVICE_ADD("acia_clock", CLOCK, 153600) MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(c68ksbc_state, write_acia_clock)) MACHINE_CONFIG_END /* ROM definition */ ROM_START( 68ksbc ) ROM_REGION(0x1000000, "maincpu", 0) ROM_LOAD( "t68k.bin", 0x0000, 0x2f78, CRC(20a8d0d0) SHA1(544fd8bd8ed017115388c8b0f7a7a59a32253e43) ) ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ COMP( 2002, 68ksbc, 0, 0, c68ksbc, c68ksbc, driver_device, 0, "Ichit Sirichote", "68k Single Board Computer", GAME_NO_SOUND_HW)