// license:MAME // copyright-holders:Robbbert /******************************************************************************* 6809 Portable 12/05/2009 Skeleton driver. 21/09/2011 connected to terminal, notes added [Robbbert] Chips used: - 6809E CPU - 6845 CRTC - 6840 CTC - 6551 UART Console - 6551 UART Aux - 6850 UART Unknown purpose - uPD765 FDC - 2764 8K ROM for CPU - 2732 4K ROM for Chargen (not dumped) - 6x 6264 RAM - 3x 5516 RAM - XTAL: 16MHz So much for the official documentation. In practice, it reads/writes to a terminal, and doesn't use most of the other devices. 'maincpu' (F9DD): unmapped program memory write to 00F0 = 05 & FF 'maincpu' (F9E3): unmapped program memory read from 0001 & FF <----- these 2 are CLR 0001 'maincpu' (F9E3): unmapped program memory write to 0001 = 00 & FF 'maincpu' (F9E6): unmapped program memory read from 0005 & FF <----- these 2 are CLR 0005 'maincpu' (F9E6): unmapped program memory write to 0005 = 00 & FF 'maincpu' (F9E9): unmapped program memory write to 0002 = 0B & FF <-- these 2 are STD 0002 'maincpu' (F9E9): unmapped program memory write to 0003 = 1E & FF 'maincpu' (F9EC): unmapped program memory write to 0006 = 0B & FF <-- these 2 are STD 0006 'maincpu' (F9EC): unmapped program memory write to 0007 = 1E & FF 'maincpu' (FA4D): unmapped program memory write to 00F2 = 00 & FF <-- the remainder seems to be disk related 'maincpu' (FA52): unmapped program memory write to 00F3 = 00 & FF 'maincpu' (FA57): unmapped program memory write to 00F4 = 00 & FF 'maincpu' (FA5C): unmapped program memory write to 00F5 = 00 & FF 'maincpu' (FA61): unmapped program memory write to 00F6 = 02 & FF 'maincpu' (FA66): unmapped program memory write to 00F7 = 09 & FF 'maincpu' (FA6B): unmapped program memory write to 00F0 = 01 & FF 'maincpu' (FA6E): unmapped program memory read from 00F0 & FF 'maincpu' (FA4D): unmapped program memory write to 00F2 = 00 & FF 'maincpu' (FA52): unmapped program memory write to 00F3 = 00 & FF 'maincpu' (FA57): unmapped program memory write to 00F4 = 00 & FF 'maincpu' (FA5C): unmapped program memory write to 00F5 = 00 & FF 'maincpu' (FA61): unmapped program memory write to 00F6 = 02 & FF 'maincpu' (FA66): unmapped program memory write to 00F7 = 09 & FF 'maincpu' (FA6B): unmapped program memory write to 00F0 = 01 & FF 'maincpu' (FA6E): unmapped program memory read from 00F0 & FF 'maincpu' (FA4D): unmapped program memory write to 00F2 = 00 & FF 'maincpu' (FA52): unmapped program memory write to 00F3 = 00 & FF 'maincpu' (FA57): unmapped program memory write to 00F4 = 00 & FF 'maincpu' (FA5C): unmapped program memory write to 00F5 = 00 & FF 'maincpu' (FA61): unmapped program memory write to 00F6 = 02 & FF 'maincpu' (FA66): unmapped program memory write to 00F7 = 09 & FF 'maincpu' (FA6B): unmapped program memory write to 00F0 = 01 & FF 'maincpu' (FA6E): unmapped program memory read from 00F0 & FF 'maincpu' (FA41): unmapped program memory write to 00F2 = 00 & FF 'maincpu' (FA46): unmapped program memory write to 00F0 = 04 & FF 'maincpu' (FA82): unmapped program memory read from 00F0 & FF 'maincpu' (FA4D): unmapped program memory write to 00F2 = 00 & FF 'maincpu' (FA52): unmapped program memory write to 00F3 = 00 & FF 'maincpu' (FA57): unmapped program memory write to 00F4 = 00 & FF 'maincpu' (FA5C): unmapped program memory write to 00F5 = 00 & FF 'maincpu' (FA61): unmapped program memory write to 00F6 = 02 & FF 'maincpu' (FA66): unmapped program memory write to 00F7 = 09 & FF 'maincpu' (FA6B): unmapped program memory write to 00F0 = 01 & FF 'maincpu' (FA6E): unmapped program memory read from 00F0 & FF 'maincpu' (FA4D): unmapped program memory write to 00F2 = 00 & FF 'maincpu' (FA52): unmapped program memory write to 00F3 = 00 & FF 'maincpu' (FA57): unmapped program memory write to 00F4 = 00 & FF 'maincpu' (FA5C): unmapped program memory write to 00F5 = 00 & FF 'maincpu' (FA61): unmapped program memory write to 00F6 = 02 & FF 'maincpu' (FA66): unmapped program memory write to 00F7 = 09 & FF 'maincpu' (FA6B): unmapped program memory write to 00F0 = 01 & FF 'maincpu' (FA6E): unmapped program memory read from 00F0 & FF <-- now it gives up & prints an error **********************************************************************************/ #include "emu.h" #include "cpu/m6809/m6809.h" #include "machine/terminal.h" #define TERMINAL_TAG "terminal" class d6809_state : public driver_device { public: d6809_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_maincpu(*this, "maincpu"), m_terminal(*this, TERMINAL_TAG) { } required_device m_maincpu; required_device m_terminal; DECLARE_WRITE8_MEMBER( kbd_put ); DECLARE_READ8_MEMBER( term_r ); DECLARE_WRITE8_MEMBER( term_w ); UINT8 m_term_data; virtual void machine_reset(); }; READ8_MEMBER( d6809_state::term_r ) { UINT8 ret = m_term_data; m_term_data = 0; return ret; } WRITE8_MEMBER( d6809_state::term_w ) { if ((data > 0) && (data < 0x80)) m_terminal->write(space, 0, data); } static ADDRESS_MAP_START( d6809_mem, AS_PROGRAM, 8, d6809_state ) ADDRESS_MAP_UNMAP_HIGH // 00-FF is for various devices. AM_RANGE(0x00ff, 0x00ff) AM_READWRITE(term_r,term_w) AM_RANGE(0x1000, 0xdfff) AM_RAM AM_RANGE(0xe000, 0xffff) AM_ROM ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START( d6809 ) INPUT_PORTS_END WRITE8_MEMBER( d6809_state::kbd_put ) { m_term_data = data; } void d6809_state::machine_reset() { } static MACHINE_CONFIG_START( d6809, d6809_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu",M6809E, XTAL_4MHz) MCFG_CPU_PROGRAM_MAP(d6809_mem) /* video hardware */ MCFG_DEVICE_ADD(TERMINAL_TAG, GENERIC_TERMINAL, 0) MCFG_GENERIC_TERMINAL_KEYBOARD_CB(WRITE8(d6809_state, kbd_put)) MACHINE_CONFIG_END /* ROM definition */ ROM_START( d6809 ) ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF ) ROM_LOAD( "d6809.rom", 0xe000, 0x2000, CRC(2ceb40b8) SHA1(780111541234b4f0f781a118d955df61daa56e7e)) ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */ COMP( 1983, d6809, 0, 0, d6809, d6809, driver_device, 0, "Dunfield", "6809 Portable", GAME_IS_SKELETON | GAME_NOT_WORKING | GAME_NO_SOUND_HW)