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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 MAME_MACHINE_MOS6530_H
#define MAME_MACHINE_MOS6530_H
#pragma once
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
/***************************************************************************
MACROS / CONSTANTS
***************************************************************************/
class mos6530_device : public device_t
{
public:
mos6530_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
auto in_pa_callback() { return m_in_pa_cb.bind(); }
auto out_pa_callback() { return m_out_pa_cb.bind(); }
auto in_pb_callback() { return m_in_pb_cb.bind(); }
auto out_pb_callback() { return m_out_pb_cb.bind(); }
DECLARE_READ8_MEMBER( read );
DECLARE_WRITE8_MEMBER( write );
uint8_t porta_in_get();
uint8_t portb_in_get();
uint8_t porta_out_get();
uint8_t 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:
enum
{
TIMER_END_CALLBACK
};
struct mos6530_port
{
uint8_t m_in;
uint8_t m_out;
uint8_t m_ddr;
};
// 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_t m_irqstate;
uint8_t m_irqenable;
uint8_t m_timershift;
uint8_t m_timerstate;
emu_timer * m_timer;
uint32_t m_clock;
void update_irqstate();
uint8_t get_timer();
void porta_in_set(uint8_t data, uint8_t mask);
void portb_in_set(uint8_t data, uint8_t mask);
};
DECLARE_DEVICE_TYPE(MOS6530, mos6530_device)
#endif // MAME_MACHINE_MOS6530_H
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