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mt420: Add an EEPROM and a crude hack to push the program enough to read it (nw)

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This commit is contained in:
AJR 2017-11-19 02:40:45 -05:00
parent c834be2454
commit 166fb6531a
1 changed files with 16 additions and 1 deletions
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17
src/mame/drivers/microterm.cpp
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@ -22,20 +22,29 @@ public:
//, m_p_chargen(*this, "chargen")
{ }
DECLARE_READ8_MEMBER(c000_r);
private:
required_device<cpu_device> m_maincpu;
//required_region_ptr<u8> m_p_chargen;
};
READ8_MEMBER(microterm_state::c000_r)
{
return machine().rand() & 0x80;
}
static ADDRESS_MAP_START( mt420_mem_map, AS_PROGRAM, 8, microterm_state )
AM_RANGE(0x0000, 0x7fff) AM_ROM AM_REGION("maincpu", 0)
AM_RANGE(0xc000, 0xc000) AM_READNOP
AM_RANGE(0xc000, 0xc000) AM_READ(c000_r) AM_WRITENOP
AM_RANGE(0xe000, 0xefff) AM_RAM
AM_RANGE(0xf000, 0xf7ff) AM_RAM
ADDRESS_MAP_END
static ADDRESS_MAP_START( mt420_io_map, AS_IO, 8, microterm_state )
ADDRESS_MAP_GLOBAL_MASK(0xff)
AM_RANGE(0xe0, 0xef) AM_DEVREADWRITE("duart", mc68681_device, read, write)
AM_RANGE(0xf1, 0xf1) AM_READNOP
ADDRESS_MAP_END
static ADDRESS_MAP_START( mt5510_mem_map, AS_PROGRAM, 8, microterm_state )
@ -59,6 +68,12 @@ static MACHINE_CONFIG_START( mt420 )
MCFG_DEVICE_ADD("duart", MC68681, XTAL_3_6864MHz)
MCFG_MC68681_IRQ_CALLBACK(INPUTLINE("maincpu", 0))
MCFG_MC68681_OUTPORT_CALLBACK(DEVWRITELINE("eeprom", eeprom_serial_93cxx_device, di_write)) MCFG_DEVCB_BIT(5)
MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("eeprom", eeprom_serial_93cxx_device, cs_write)) MCFG_DEVCB_BIT(4)
MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("eeprom", eeprom_serial_93cxx_device, clk_write)) MCFG_DEVCB_BIT(3)
MCFG_EEPROM_SERIAL_93C46_ADD("eeprom")
MCFG_EEPROM_SERIAL_DO_CALLBACK(DEVWRITELINE("duart", mc68681_device, ip6_w))
MACHINE_CONFIG_END
static MACHINE_CONFIG_START( mt5510 )