// license:BSD-3-Clause // copyright-holders:Robbbert /*************************************************************************** 2013-12-01 Driver for Cromemco MCB-216 SCC (Single Card Computer), and also the earlier CB-308. The driver is working, just missing some hardware info (see ToDo). TODO: - Find out cpu clock speed - Find out what UART type is used Memory allocation - 0000 to 0FFF - standard roms - 1000 to 1FFF - optional roms or ram (expect roms) - 2000 to 23FF - standard ram - 2400 to FFFF - optional whatever the user wants (expect ram) MCB-216: Press Enter twice. You will see the Basic OK prompt. To get into the monitor, use the QUIT command, and to return use the B command. The mcb216 can use an optional floppy-disk-drive unit. The only other storage is paper-tape, which is expected to be attached to the terminal. CB-308: Press Enter twice. You will see the Monitor logo. To get into the BASIC, enter GE400. To return to the monitor, use the QUIT command followed by pressing Enter twice. All monitor commands must be in uppercase. The only storage is paper-tape. ****************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" #include "machine/terminal.h" #define TERMINAL_TAG "terminal" class mcb216_state : public driver_device { public: mcb216_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_WRITE8_MEMBER(kbd_put); DECLARE_READ8_MEMBER(keyin_r); DECLARE_READ8_MEMBER(status_r); DECLARE_MACHINE_RESET(mcb216); DECLARE_MACHINE_RESET(cb308); private: UINT8 m_term_data; required_device m_maincpu; required_device m_terminal; }; static ADDRESS_MAP_START(mcb216_mem, AS_PROGRAM, 8, mcb216_state) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x0000, 0x0fff) AM_ROM AM_REGION("roms", 0) AM_RANGE(0x2000, 0x23ff) AM_RAM AM_RANGE(0x2400, 0xffff) AM_RAM ADDRESS_MAP_END static ADDRESS_MAP_START(mcb216_io, AS_IO, 8, mcb216_state) ADDRESS_MAP_GLOBAL_MASK(0xff) AM_RANGE(0x00, 0x00) AM_READ(status_r) AM_RANGE(0x01, 0x01) AM_READ(keyin_r) AM_DEVWRITE(TERMINAL_TAG, generic_terminal_device, write) ADDRESS_MAP_END static ADDRESS_MAP_START(cb308_mem, AS_PROGRAM, 8, mcb216_state) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x0000, 0x1fff) AM_RAM AM_RANGE(0xe000, 0xefff) AM_ROM AM_REGION("roms", 0) ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START( mcb216 ) INPUT_PORTS_END READ8_MEMBER( mcb216_state::keyin_r ) { UINT8 ret = m_term_data; m_term_data = 0; return ret; } // 0x40 - a keystroke is available // 0x80 - ok to send to terminal READ8_MEMBER( mcb216_state::status_r ) { return (m_term_data) ? 0xc0 : 0x80; } WRITE8_MEMBER( mcb216_state::kbd_put ) { m_term_data = data; } MACHINE_RESET_MEMBER( mcb216_state, mcb216 ) { m_term_data = 0; } MACHINE_RESET_MEMBER( mcb216_state, cb308 ) { m_term_data = 0; m_maincpu->set_state_int(Z80_PC, 0xe000); } static MACHINE_CONFIG_START( mcb216, mcb216_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu", Z80, 4000000) MCFG_CPU_PROGRAM_MAP(mcb216_mem) MCFG_CPU_IO_MAP(mcb216_io) MCFG_MACHINE_RESET_OVERRIDE(mcb216_state, mcb216) /* video hardware */ MCFG_DEVICE_ADD(TERMINAL_TAG, GENERIC_TERMINAL, 0) MCFG_GENERIC_TERMINAL_KEYBOARD_CB(WRITE8(mcb216_state, kbd_put)) MACHINE_CONFIG_END static MACHINE_CONFIG_START( cb308, mcb216_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu", Z80, 4000000) MCFG_CPU_PROGRAM_MAP(cb308_mem) MCFG_CPU_IO_MAP(mcb216_io) MCFG_MACHINE_RESET_OVERRIDE(mcb216_state, cb308) /* video hardware */ MCFG_DEVICE_ADD(TERMINAL_TAG, GENERIC_TERMINAL, 0) MCFG_GENERIC_TERMINAL_KEYBOARD_CB(WRITE8(mcb216_state, kbd_put)) MACHINE_CONFIG_END /* ROM definition */ ROM_START( mcb216 ) ROM_REGION(0x1000, "roms", 0) ROM_LOAD( "mcb216r0", 0x0000, 0x0800, CRC(86d20cea) SHA1(9fb8fdbcb8d31bd3304a0b3339c7f423188e9d37) ) ROM_LOAD( "mcb216r1", 0x0800, 0x0800, CRC(68a25b2c) SHA1(3eadd4a5d65726f767742deb4b51a97df813f37d) ) ROM_END ROM_START( cb308 ) ROM_REGION(0x1000, "roms", 0) ROM_LOAD( "cb308r0", 0x0000, 0x0400, CRC(62f50531) SHA1(3071e2ab7fc6b2ca889e4fb5cf7cc9ee8fbe53d3) ) ROM_LOAD( "cb308r1", 0x0400, 0x0400, CRC(03191ac1) SHA1(84665dfc797c9f51bb659291b18399986ed846fb) ) ROM_LOAD( "cb308r2", 0x0800, 0x0400, CRC(695ea521) SHA1(efe36a712e2a038ee804e556c5ebe05443cf798e) ) ROM_LOAD( "cb308r3", 0x0c00, 0x0400, CRC(e3e4a778) SHA1(a7c14458f8636d860ae25b10387fa6f7f2ef6ef9) ) ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ COMP( 1979, mcb216, 0, 0, mcb216, mcb216, driver_device, 0, "Cromemco", "MCB-216", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW ) COMP( 1977, cb308, mcb216, 0, cb308, mcb216, driver_device, 0, "Cromemco", "CB-308", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW )