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// license:BSD-3-Clause
// copyright-holders:Philip Bennett
/***************************************************************************
Namco 62XX
This custom chip is a Fujitsu MB8843 MCU programmed to act as an I/O
device. It is used by just one game: Gaplus.
TODO: Chip pin description/layout/notes
***************************************************************************/
#include "emu.h"
#include "machine/namco62.h"
#define VERBOSE 0
#define LOG(x) do { if (VERBOSE) logerror x; } while (0)
/***************************************************************************
DEVICE INTERFACE
***************************************************************************/
static ADDRESS_MAP_START( namco_62xx_map_io, AS_IO, 8, namco_62xx_device )
// AM_RANGE(MB88_PORTK, MB88_PORTK) AM_READ(namco_62xx_K_r)
// AM_RANGE(MB88_PORTO, MB88_PORTO) AM_WRITE(namco_62xx_O_w)
// AM_RANGE(MB88_PORTR0, MB88_PORTR0) AM_READ(namco_62xx_R0_r)
// AM_RANGE(MB88_PORTR2, MB88_PORTR2) AM_READ(namco_62xx_R2_r)
ADDRESS_MAP_END
static MACHINE_CONFIG_FRAGMENT( namco_62xx )
MCFG_CPU_ADD("mcu", MB8843, DERIVED_CLOCK(1,1)) /* parent clock, internally divided by 6 (TODO: Correct?) */
MCFG_CPU_IO_MAP(namco_62xx_map_io)
MCFG_DEVICE_DISABLE()
MACHINE_CONFIG_END
ROM_START( namco_62xx )
ROM_REGION( 0x800, "mcu", 0 )
ROM_LOAD( "62xx.bin", 0x0000, 0x0800, CRC(308dc115) SHA1(fe0a60fc339ac2eeed4879a64c1aab130f9d4cfe) )
ROM_END
const device_type NAMCO_62XX = device_creator<namco_62xx_device>;
namco_62xx_device::namco_62xx_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, NAMCO_62XX, "Namco 62xx", tag, owner, clock, "namco62", __FILE__),
m_cpu(*this, "mcu"),
m_in_0(*this),
m_in_1(*this),
m_in_2(*this),
m_in_3(*this),
m_out_0(*this),
m_out_1(*this)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void namco_62xx_device::device_start()
{
/* resolve our read callbacks */
m_in_0.resolve_safe(0);
m_in_1.resolve_safe(0);
m_in_2.resolve_safe(0);
m_in_3.resolve_safe(0);
/* resolve our write callbacks */
m_out_0.resolve_safe();
m_out_1.resolve_safe();
}
//-------------------------------------------------
// device_mconfig_additions - return a pointer to
// the device's machine fragment
//-------------------------------------------------
machine_config_constructor namco_62xx_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( namco_62xx );
}
//-------------------------------------------------
// device_rom_region - return a pointer to the
// the device's ROM definitions
//-------------------------------------------------
const tiny_rom_entry *namco_62xx_device::device_rom_region() const
{
return ROM_NAME(namco_62xx );
}
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