diff options
Diffstat (limited to 'src/mame/drivers/mcb216.c')
-rw-r--r-- | src/mame/drivers/mcb216.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/src/mame/drivers/mcb216.c b/src/mame/drivers/mcb216.c new file mode 100644 index 00000000000..05aaf8960f8 --- /dev/null +++ b/src/mame/drivers/mcb216.c @@ -0,0 +1,161 @@ +// 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<cpu_device> m_maincpu; + required_device<generic_terminal_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 ) |