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// license:BSD-3-Clause
// copyright-holders:Nicola Salmoria
/***************************************************************************
RP5H01 - Ricoh 64x1bit(+8bit) PROM with 6/7-bit counter
****************************************************************************
___________
DATA 1 |* | 8 COUNTER OUT
| |
_CE/Vpp 2 | RP5H01 | 7 RESET
| RF5H01 |
Vcc 3 | | 6 DATA CLOCK
| |
GND 4 |___________| 5 TEST
***************************************************************************/
#ifndef MAME_MACHINE_RP5H01_H
#define MAME_MACHINE_RP5H01_H
/***************************************************************************
PARAMETERS
***************************************************************************/
/***************************************************************************
MACROS / CONSTANTS
***************************************************************************/
class rp5h01_device : public device_t
{
public:
rp5h01_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
DECLARE_WRITE_LINE_MEMBER( enable_w ); /* /CE */
DECLARE_WRITE_LINE_MEMBER( reset_w ); /* RESET */
DECLARE_WRITE_LINE_MEMBER( cs_w ); /* CS */
DECLARE_WRITE_LINE_MEMBER( clock_w ); /* DATA CLOCK (active low) */
DECLARE_WRITE_LINE_MEMBER( test_w ); /* TEST */
DECLARE_READ_LINE_MEMBER( counter_r ); /* COUNTER OUT */
DECLARE_READ_LINE_MEMBER( data_r ); /* DATA */
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
private:
/* these also work as the address masks */
enum {
COUNTER_MODE_6_BITS = 0x3f,
COUNTER_MODE_7_BITS = 0x7f
};
static uint8_t const s_initial_data[0x10];
// internal state
int m_counter;
int m_counter_mode; /* test pin */
int m_enabled; /* chip enable */
int m_old_reset; /* reset pin state (level-triggered) */
int m_old_clock; /* clock pin state (level-triggered) */
uint8_t const *m_data;
optional_region_ptr<uint8_t> m_rom;
};
DECLARE_DEVICE_TYPE(RP5H01, rp5h01_device)
/*
* Device uses memory region
* with the same tag as the one
* assigned to device.
*/
#endif // MAME_MACHINE_RP5H01_H
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