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/***************************************************************************
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 "namco62.h"
#include "cpu/mb88xx/mb88xx.h"
#define VERBOSE 0
#define LOG(x) do { if (VERBOSE) logerror x; } while (0)
typedef struct _namco_62xx_state namco_62xx_state;
struct _namco_62xx_state
{
device_t* cpu;
devcb_resolved_read8 in[4];
devcb_resolved_write8 out[2];
};
INLINE namco_62xx_state *get_safe_token(device_t *device)
{
assert(device != NULL);
assert(device->type() == NAMCO_62XX);
return (namco_62xx_state *)downcast<legacy_device_base *>(device)->token();
}
/***************************************************************************
DEVICE INTERFACE
***************************************************************************/
static ADDRESS_MAP_START( namco_62xx_map_io, ADDRESS_SPACE_IO, 8 )
// 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", ROMREGION_LOADBYNAME )
ROM_LOAD( "62xx.bin", 0x0000, 0x0800, CRC(308dc115) SHA1(fe0a60fc339ac2eeed4879a64c1aab130f9d4cfe) )
ROM_END
/*-------------------------------------------------
device start callback
-------------------------------------------------*/
static DEVICE_START( namco_62xx )
{
const namco_62xx_interface *config = (const namco_62xx_interface *)device->baseconfig().static_config();
namco_62xx_state *state = get_safe_token(device);
astring tempstring;
assert(config != NULL);
/* find our CPU */
state->cpu = device->subdevice("mcu");
assert(state->cpu != NULL);
/* resolve our read callbacks */
devcb_resolve_read8(&state->in[0], &config->in[0], device);
devcb_resolve_read8(&state->in[1], &config->in[1], device);
devcb_resolve_read8(&state->in[2], &config->in[2], device);
devcb_resolve_read8(&state->in[3], &config->in[3], device);
/* resolve our write callbacks */
devcb_resolve_write8(&state->out[0], &config->out[0], device);
devcb_resolve_write8(&state->out[1], &config->out[1], device);
}
/*-------------------------------------------------
device definition
-------------------------------------------------*/
static const char DEVTEMPLATE_SOURCE[] = __FILE__;
#define DEVTEMPLATE_ID(p,s) p##namco_62xx##s
#define DEVTEMPLATE_FEATURES DT_HAS_START | DT_HAS_ROM_REGION | DT_HAS_MACHINE_CONFIG
#define DEVTEMPLATE_NAME "Namco 62xx"
#define DEVTEMPLATE_FAMILY "Namco I/O"
#include "devtempl.h"
DEFINE_LEGACY_DEVICE(NAMCO_62XX, namco_62xx);
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