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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
MOS Technology 6530 Memory, I/O, Timer Array emulation
**********************************************************************
_____ _____
Vss 1 |* \_/ | 40 PA1
PA0 2 | | 39 PA2
phi2 3 | | 38 PA3
RS0 4 | | 37 PA4
A9 5 | | 36 PA5
A8 6 | | 35 PA6
A7 7 | | 34 PA7
A6 8 | | 33 DB0
R/W 9 | | 32 DB1
A5 10 | MCS6530 | 31 DB2
A4 11 | | 30 DB3
A3 12 | | 29 DB4
A2 13 | | 28 DB5
A1 14 | | 27 DB6
A0 15 | | 26 DB7
_RES 16 | | 25 PB0
IRQ/PB7 17 | | 24 PB1
CS1/PB6 18 | | 23 PB2
CS2/PB5 19 | | 22 PB3
Vcc 20 |_____________| 21 PB4
**********************************************************************/
#ifndef __MIOT6530_H__
#define __MIOT6530_H__
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
struct mos6530_port
{
UINT8 m_in;
UINT8 m_out;
UINT8 m_ddr;
};
/***************************************************************************
MACROS / CONSTANTS
***************************************************************************/
class mos6530_device : public device_t
{
public:
mos6530_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
~mos6530_device() {}
template<class _Object> static devcb_base &set_in_pa_callback(device_t &device, _Object object) { return downcast<mos6530_device &>(device).m_in_pa_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_pa_callback(device_t &device, _Object object) { return downcast<mos6530_device &>(device).m_out_pa_cb.set_callback(object); }
template<class _Object> static devcb_base &set_in_pb_callback(device_t &device, _Object object) { return downcast<mos6530_device &>(device).m_in_pb_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_pb_callback(device_t &device, _Object object) { return downcast<mos6530_device &>(device).m_out_pb_cb.set_callback(object); }
DECLARE_READ8_MEMBER( read );
DECLARE_WRITE8_MEMBER( write );
UINT8 porta_in_get();
UINT8 portb_in_get();
UINT8 porta_out_get();
UINT8 portb_out_get();
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
private:
// internal state
devcb_read8 m_in_pa_cb;
devcb_write8 m_out_pa_cb;
devcb_read8 m_in_pb_cb;
devcb_write8 m_out_pb_cb;
mos6530_port m_port[2];
UINT8 m_irqstate;
UINT8 m_irqenable;
UINT8 m_timershift;
UINT8 m_timerstate;
emu_timer * m_timer;
UINT32 m_clock;
void update_irqstate();
UINT8 get_timer();
void porta_in_set(UINT8 data, UINT8 mask);
void portb_in_set(UINT8 data, UINT8 mask);
enum
{
TIMER_END_CALLBACK
};
};
extern const device_type MOS6530;
#define MCFG_MOS6530_IN_PA_CB(_devcb) \
devcb = &mos6530_device::set_in_pa_callback(*device, DEVCB_##_devcb);
#define MCFG_MOS6530_OUT_PA_CB(_devcb) \
devcb = &mos6530_device::set_out_pa_callback(*device, DEVCB_##_devcb);
#define MCFG_MOS6530_IN_PB_CB(_devcb) \
devcb = &mos6530_device::set_in_pb_callback(*device, DEVCB_##_devcb);
#define MCFG_MOS6530_OUT_PB_CB(_devcb) \
devcb = &mos6530_device::set_out_pb_callback(*device, DEVCB_##_devcb);
#endif
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