diff options
Diffstat (limited to 'src/mess/drivers/d6809.c')
-rw-r--r-- | src/mess/drivers/d6809.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/src/mess/drivers/d6809.c b/src/mess/drivers/d6809.c new file mode 100644 index 00000000000..c4503398822 --- /dev/null +++ b/src/mess/drivers/d6809.c @@ -0,0 +1,167 @@ +/******************************************************************************* + + 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" + + +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<cpu_device> m_maincpu; + required_device<generic_terminal_device> m_terminal; + DECLARE_WRITE8_MEMBER( kbd_put ); + DECLARE_READ8_MEMBER( term_r ); + DECLARE_WRITE8_MEMBER( term_w ); + UINT8 m_term_data; +}; + +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; +} + +static GENERIC_TERMINAL_INTERFACE( terminal_intf ) +{ + DEVCB_DRIVER_MEMBER(d6809_state, kbd_put) +}; + +static MACHINE_RESET(d6809) +{ +} + + +static MACHINE_CONFIG_START( d6809, d6809_state ) + /* basic machine hardware */ + MCFG_CPU_ADD("maincpu",M6809E, XTAL_4MHz) + MCFG_CPU_PROGRAM_MAP(d6809_mem) + + MCFG_MACHINE_RESET(d6809) + + /* video hardware */ + MCFG_GENERIC_TERMINAL_ADD(TERMINAL_TAG, terminal_intf) +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_NOT_WORKING | GAME_NO_SOUND_HW) |