/****************************************************************************************** Commodore C900 UNIX prototype http://www.zimmers.net/cbmpics/c900.html http://www.zimmers.net/cbmpics/cbm/900/c900-chips.txt Chips: Z8001 CPU, Z8010 MMU, Z8030 SCC, Z8036 CIO. Crystal: 12MHz The Z8030 runs 2 serial ports. The Z8036 runs the IEEE interface and the speaker. The FDC is an intelligent device that communicates with the main board via the MMU. It has a 6508 CPU. *******************************************************************************************/ #include "emu.h" #include "cpu/z8000/z8000.h" #include "machine/terminal.h" #define TERMINAL_TAG "terminal" class c900_state : public driver_device { public: c900_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) { } DECLARE_READ16_MEMBER(port1e_r); DECLARE_READ16_MEMBER(key_r); DECLARE_READ16_MEMBER(stat_r); DECLARE_WRITE8_MEMBER(kbd_put); private: UINT8 m_term_data; required_device m_maincpu; required_device m_terminal; }; static ADDRESS_MAP_START(c900_mem, AS_PROGRAM, 16, c900_state) AM_RANGE(0x00000, 0x07fff) AM_ROM AM_REGION("roms", 0) ADDRESS_MAP_END static ADDRESS_MAP_START(c900_data, AS_DATA, 16, c900_state) AM_RANGE(0x00000, 0x07fff) AM_ROM AM_REGION("roms", 0) AM_RANGE(0x08000, 0x6ffff) AM_RAM ADDRESS_MAP_END static ADDRESS_MAP_START(c900_io, AS_IO, 16, c900_state) AM_RANGE(0x0010, 0x0011) AM_READ(stat_r) AM_RANGE(0x001A, 0x001B) AM_READ(key_r) AM_RANGE(0x001E, 0x001F) AM_READ(port1e_r) AM_RANGE(0x0100, 0x0101) AM_READ(stat_r) AM_RANGE(0x0110, 0x0111) AM_READ(key_r) AM_DEVWRITE8(TERMINAL_TAG, generic_terminal_device, write, 0x00ff) ADDRESS_MAP_END static INPUT_PORTS_START( c900 ) INPUT_PORTS_END READ16_MEMBER( c900_state::port1e_r ) { return 0; } READ16_MEMBER( c900_state::key_r ) { UINT8 ret = m_term_data; m_term_data = 0; return ret; } READ16_MEMBER( c900_state::stat_r ) { return (m_term_data) ? 6 : 4; } WRITE8_MEMBER( c900_state::kbd_put ) { m_term_data = data; } /* F4 Character Displayer */ static const gfx_layout c900_charlayout = { 8, 16, /* 8 x 16 characters */ 256, /* 256 characters */ 1, /* 1 bits per pixel */ { 0 }, /* no bitplanes */ /* x offsets */ { 0, 1, 2, 3, 4, 5, 6, 7 }, /* y offsets */ { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8, 10*8, 11*8, 12*8, 13*8, 14*8, 15*8 }, 8*16 /* every char takes 16 bytes */ }; static GFXDECODE_START( c900 ) GFXDECODE_ENTRY( "chargen", 0x0000, c900_charlayout, 0, 1 ) GFXDECODE_END static MACHINE_CONFIG_START( c900, c900_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu", Z8001, XTAL_12MHz / 2) MCFG_CPU_PROGRAM_MAP(c900_mem) MCFG_CPU_DATA_MAP(c900_data) MCFG_CPU_IO_MAP(c900_io) MCFG_DEVICE_ADD(TERMINAL_TAG, GENERIC_TERMINAL, 0) MCFG_GENERIC_TERMINAL_KEYBOARD_CB(WRITE8(c900_state, kbd_put)) MCFG_GFXDECODE_ADD("gfxdecode", "palette", c900) MCFG_PALETTE_ADD_BLACK_AND_WHITE("palette") MACHINE_CONFIG_END ROM_START( c900 ) ROM_REGION16_LE( 0x8000, "roms", 0 ) ROM_LOAD16_BYTE( "c 900 boot-h v 1.0.bin.u17", 0x0001, 0x4000, CRC(c3aa7fc1) SHA1(ff12dd100fa7b1e7e931e9a8ef4c4f5cc056e099) ) ROM_LOAD16_BYTE( "c 900 boot-l v 1.0.bin.u18", 0x0000, 0x4000, CRC(0aa39272) SHA1(b2c5da4586d38fc66bb33aafeae4dbda36080f1e) ) ROM_REGION( 0x2000, "fdc", 0 ) ROM_LOAD( "s41_6-20-85.bin", 0x0000, 0x2000, CRC(ec245721) SHA1(4cc19014b4887833a56b1236dc5fe39cc5d7b5c3) ) ROM_REGION( 0x1000, "chargen", 0 ) // this must be for the c900 terminal as the mainframe has no video output ROM_LOAD( "380217-01.u2", 0x0000, 0x1000, CRC(64cb4171) SHA1(e60d796170addfd27e2c33090f9c512c7e3f99f5) ) ROM_END /* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */ COMP( 1985, c900, 0, 0, c900, c900, driver_device, 0, "Commodore", "Commodore 900", GAME_IS_SKELETON )