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/**********************************************************************
MOS Technology 6530 Memory, I/O, Timer Array emulation
Copyright MESS Team.
Visit http://mamedev.org for licensing and usage restrictions.
**********************************************************************
_____ _____
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_interface
{
devcb_read8 m_in_pa_cb;
devcb_write8 m_out_pa_cb;
devcb_read8 m_in_pb_cb;
devcb_write8 m_out_pb_cb;
};
struct mos6530_port
{
devcb_resolved_read8 in_port_func;
devcb_resolved_write8 out_port_func;
UINT8 in;
UINT8 out;
UINT8 ddr;
};
/***************************************************************************
MACROS / CONSTANTS
***************************************************************************/
class mos6530_device : public device_t,
mos6530_interface
{
public:
mos6530_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
~mos6530_device() {}
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_config_complete();
virtual void device_start();
virtual void device_reset();
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
private:
// internal state
//devcb_resolved_write_line out_irq_func;
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_ADD(_tag, _clock, _config) \
MCFG_DEVICE_ADD((_tag), MOS6530, _clock) \
MCFG_DEVICE_CONFIG(_config)
#define MOS6530_INTERFACE(name) \
const mos6530_interface (name) =
#endif
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