diff options
Diffstat (limited to 'src/mame/drivers/evmbug.c')
-rw-r--r-- | src/mame/drivers/evmbug.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/src/mame/drivers/evmbug.c b/src/mame/drivers/evmbug.c new file mode 100644 index 00000000000..355eaca0769 --- /dev/null +++ b/src/mame/drivers/evmbug.c @@ -0,0 +1,117 @@ +// license:BSD-3-Clause +// copyright-holders:Robbbert +/*************************************************************************** + + Stuart's Breadboard Project. TMS9995 evaluation kit TMAM6095. + + 2013-06-02 Skeleton driver. + + http://www.avjd51.dsl.pipex.com/tms9995_eval_module/tms9995_eval_module.htm + + +****************************************************************************/ + +#include "emu.h" +#include "cpu/tms9900/tms9995.h" +#include "machine/terminal.h" + +#define TERMINAL_TAG "terminal" + +class evmbug_state : public driver_device +{ +public: + evmbug_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_READ8_MEMBER(rs232_r); + DECLARE_WRITE8_MEMBER(rs232_w); + DECLARE_WRITE8_MEMBER(kbd_put); + virtual void machine_reset(); + UINT8 m_term_data; + UINT8 m_term_out; + required_device<cpu_device> m_maincpu; + required_device<generic_terminal_device> m_terminal; +}; + +static ADDRESS_MAP_START( evmbug_mem, AS_PROGRAM, 8, evmbug_state ) + AM_RANGE(0x0000, 0x17ff) AM_ROM + AM_RANGE(0xec00, 0xefff) AM_RAM +ADDRESS_MAP_END + +static ADDRESS_MAP_START( evmbug_io, AS_IO, 8, evmbug_state ) + ADDRESS_MAP_UNMAP_HIGH + AM_RANGE(0x0000, 0x0007) AM_WRITE(rs232_w) + AM_RANGE(0x0000, 0x0002) AM_READ(rs232_r) +ADDRESS_MAP_END + +/* Input ports */ +static INPUT_PORTS_START( evmbug ) +INPUT_PORTS_END + +READ8_MEMBER( evmbug_state::rs232_r ) +{ + static UINT8 temp = 0; + temp^=0xff; + if (offset == 1) + return temp; + + if (offset == 2) + { + return 0xff;//(m_term_data) ? 0 : 0xff; + } + + UINT8 ret = m_term_data; + m_term_data = 0; + return ret; +} + +WRITE8_MEMBER( evmbug_state::rs232_w ) +{ + if (offset == 0) + m_term_out = 0; + + m_term_out |= (data << offset); + + if (offset == 7) + m_terminal->write(space, 0, m_term_out & 0x7f); +} + +WRITE8_MEMBER( evmbug_state::kbd_put ) +{ + m_term_data = data; +} + +void evmbug_state::machine_reset() +{ + m_term_data = 0; + // Disable auto wait state generation by raising the READY line on reset + static_cast<tms9995_device*>(machine().device("maincpu"))->set_ready(ASSERT_LINE); +} + +static MACHINE_CONFIG_START( evmbug, evmbug_state ) + // basic machine hardware + // TMS9995 CPU @ 12.0 MHz + // We have no lines connected yet + MCFG_TMS99xx_ADD("maincpu", TMS9995, 12000000, evmbug_mem, evmbug_io ) + + /* video hardware */ + MCFG_DEVICE_ADD(TERMINAL_TAG, GENERIC_TERMINAL, 0) + MCFG_GENERIC_TERMINAL_KEYBOARD_CB(WRITE8(evmbug_state, kbd_put)) +MACHINE_CONFIG_END + +/* ROM definition */ +ROM_START( evmbug ) + ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF ) +// ROM_LOAD( "u8.bin", 0x0000, 0x1000, CRC(bdb8c7bd) SHA1(340829dcb7a65f2e830fd5aff82a312e3ed7918f) ) +// ROM_LOAD( "u9.bin", 0x1000, 0x0800, CRC(4de459ea) SHA1(00a42fe556d4ffe1f85b2ce369f544b07fbd06d9) ) + ROM_LOAD( "evmbug.bin", 0x0000, 0x8000, CRC(a239ec56) SHA1(65b500d7d0f897ce0c320cf3ec32ff4042774599) ) +ROM_END + +/* Driver */ + +/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */ +COMP( 19??, evmbug, 0, 0, evmbug, evmbug, driver_device, 0, "Texas Instruments", "TMAM6095", MACHINE_NOT_WORKING | MACHINE_NO_SOUND) |