diff --git a/src/mess/drivers/c900.c b/src/mess/drivers/c900.c index a805ca2e006..2a3dd9e1857 100644 --- a/src/mess/drivers/c900.c +++ b/src/mess/drivers/c900.c @@ -1,4 +1,4 @@ -/* +/****************************************************************************************** Commodore C900 UNIX prototype @@ -6,7 +6,14 @@ 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" @@ -18,38 +25,45 @@ 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) + : driver_device(mconfig, type, tag) + , m_maincpu(*this, "maincpu") + , m_terminal(*this, TERMINAL_TAG) { } -// UINT32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect); + 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(0x0000, 0x7fff) AM_ROM AM_REGION("maincpu", 0) - AM_RANGE(0x8000, 0xffff) AM_RAM + 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(0x100, 0x101) AM_READ(stat_r) - AM_RANGE(0x110, 0x111) AM_READ(key_r) AM_DEVWRITE8(TERMINAL_TAG, generic_terminal_device, write, 0x00ff) + 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 -//UINT32 c900_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) -//{ -// return 0; -//} - +READ16_MEMBER( c900_state::port1e_r ) +{ + return 0; +} READ16_MEMBER( c900_state::key_r ) { @@ -60,7 +74,7 @@ READ16_MEMBER( c900_state::key_r ) READ16_MEMBER( c900_state::stat_r ) { - return (m_term_data) ? 5 : 4; + return (m_term_data) ? 6 : 4; } WRITE8_MEMBER( c900_state::kbd_put ) @@ -73,31 +87,48 @@ static GENERIC_TERMINAL_INTERFACE( terminal_intf ) DEVCB_DRIVER_MEMBER(c900_state, kbd_put) }; +/* 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, 4000000) + 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) - /* video hardware */ -// MCFG_SCREEN_ADD("screen", RASTER) -// MCFG_SCREEN_REFRESH_RATE(60) -// MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */ -// MCFG_SCREEN_SIZE(512, 256) -// MCFG_SCREEN_VISIBLE_AREA(0, 512-1, 0, 256-1) -// MCFG_PALETTE_LENGTH(4) -// MCFG_SCREEN_UPDATE_DRIVER(c900_state, screen_update) MCFG_GENERIC_TERMINAL_ADD(TERMINAL_TAG, terminal_intf) + MCFG_GFXDECODE(c900) + MCFG_PALETTE_LENGTH(2) + MCFG_PALETTE_INIT_OVERRIDE(driver_device, black_and_white) MACHINE_CONFIG_END ROM_START( c900 ) - ROM_REGION16_LE( 0x8000, "maincpu", 0 ) - ROM_LOAD16_BYTE( "c 900 boot-h v 1.0.bin.u17", 0x0000, 0x4000, CRC(c3aa7fc1) SHA1(ff12dd100fa7b1e7e931e9a8ef4c4f5cc056e099) ) - ROM_LOAD16_BYTE( "c 900 boot-l v 1.0.bin.u18", 0x0001, 0x4000, CRC(0aa39272) SHA1(b2c5da4586d38fc66bb33aafeae4dbda36080f1e) ) + 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( 0x1000, "chargen", 0 ) + 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 | GAME_NOT_WORKING | GAME_NO_SOUND) +COMP( 1985, c900, 0, 0, c900, c900, driver_device, 0, "Commodore", "Commodore 900", GAME_IS_SKELETON )