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// license:BSD-3-Clause
// copyright-holders:Juergen Buchmueller
/**********************************************************************
Rockwell RA17xx (e.g. A1752, A1753) ROM, RAM and I/O chip
Juergen Buchmueller <pullmoll@t-online.de>
The device integrates a 2048 x 8 ROM, a 128 x 4 RAM and
and 16 I/O ports at one of the port ranges 00 ... 0f,
20 ... 2f, 40 ... 4f or 60 ... 6f.
**********************************************************************/
#ifndef __RA17XX_H__
#define __RA17XX_H__
#include "device.h"
/*************************************
*
* Device configuration macros
*
*************************************/
/* Set the read line handler */
#define MCFG_RA17XX_READ(_devcb) \
ra17xx_device::set_iord(*device, DEVCB_##_devcb);
/* Set the write line handler */
#define MCFG_RA17XX_WRITE(_devcb) \
ra17xx_device::set_iowr(*device, DEVCB_##_devcb);
class ra17xx_device : public device_t
{
public:
ra17xx_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
~ra17xx_device() {}
DECLARE_READ8_MEMBER ( io_r );
DECLARE_WRITE8_MEMBER( io_w );
template<class _Object> static devcb_base &set_iord(device_t &device, _Object object) { return downcast<ra17xx_device &>(device).m_iord.set_callback(object); }
template<class _Object> static devcb_base &set_iowr(device_t &device, _Object object) { return downcast<ra17xx_device &>(device).m_iowr.set_callback(object); }
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
private:
UINT8 m_line[16]; //!< input/output flip-flops for 16 I/O lines
UINT8 m_bl; //!< value of BL during the most recent output
bool m_enable; //!< true if outputs are enabled
devcb_read8 m_iord; //!< input line (read, offset = line, data = 0/1)
devcb_write8 m_iowr; //!< output line (write, offset = line, data = 0/1)
};
extern const device_type RA17XX;
#endif /* __RA17XX_H__ */
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