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68230 device improvements, not yet compiling

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Joakim Larsson 2015-06-17 22:26:57 +02:00 committed by Joakim Larsson Edström
parent 6df19efcdd
commit d7685ca35c
2 changed files with 205 additions and 23 deletions
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67
src/emu/machine/68230pit.c
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@ -42,3 +42,70 @@
*/
#include "emu.h"
#include "68230pit.h"
/***************************************************************************
IMPLEMENTATION
***************************************************************************/
// device type definition
const device_type PIT68230 = &device_creator<pit68230_device>;
//-------------------------------------------------
// pit68230_device - constructor
//-------------------------------------------------
pit68230_device::pit68230_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: device_t(mconfig, PIT68230, "68230 PI/T", tag, owner, clock, "pit68230", __FILE__),
m_internal_clock(0.0),
m_out0_cb(*this),
m_out1_cb(*this),
m_out2_cb(*this),
m_irq_cb(*this)
{
m_external_clock = 0.0;
}
//-------------------------------------------------
// tick
//-------------------------------------------------
void ptm6840_device::tick(int counter, int count)
{
if (counter == 2)
{
m_t3_scaler += count;
if ( m_t3_scaler > m_t3_divisor - 1)
{
subtract_from_counter(counter, 1);
m_t3_scaler = 0;
}
}
else
{
subtract_from_counter(counter, count);
}
}
//-------------------------------------------------
// set_clock - set clock status (0 or 1)
//-------------------------------------------------
void ptm6840_device::set_clock(int idx, int state)
{
m_clk[idx] = state;
if (!(m_control_reg[idx] & 0x02))
{
if (state)
{
tick(idx, 1);
}
}
}
WRITE_LINE_MEMBER( pit68230_device::set_c1 ) { set_clock(state); }

161
src/emu/machine/68230pit.h
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@ -5,30 +5,145 @@
Motorola MC68230 PI/T Parallell Interface and Timer
**********************************************************************/
#pragma once
#define PGCR 0x00 /* Port General Control register */
#define PSRR 0x01 /* Port Service Request register */
#define PADDR 0x02 /* Port A Data Direction register */
#define PBDDR 0x03 /* Port B Data Direction register */
#define PCDDR 0x04 /* Port C Data Direction register */
#define PIVR 0x05 /* Port Interrupt vector register */
#define PACR 0x06 /* Port A Control register */
#define PBCR 0x07 /* Port B Control register */
#define PADR 0x08 /* Port A Data register */
#define PBDR 0x09 /* Port B Data register */
#define PAAR 0x0a /* Port A Alternate register */
#define PBAR 0x0b /* Port B Alternate register */
#define PCDR 0x0c /* Port C Data register */
#define PSR 0x0d /* Port Status register */
#define TCR 0x10 /* Timer Control Register */
#define TIVR 0x11 /* Timer Interrupt Vector Register */
#define CPRH 0x13 /* Counter Preload Register High */
#define CPRM 0x14 /* Counter Preload Register Middle */
#define CPRL 0x15 /* Counter Preload Register Low */
#define CNTRH 0x17 /* Counter Register High */
#define CNTRM 0x18 /* Counter Register Middle */
#define CNTRL 0x19 /* Counter Register Low */
#define TSR 0x1A /* Timer Status Register */
#ifndef __68230PTI_H__
#define __68230PTI_H__
#include "emu.h"
#define PIT_68230_PGCR 0x00 /* Port General Control register */
#define PIT_68230_PSRR 0x01 /* Port Service Request register */
#define PIT_68230_PADDR 0x02 /* Port A Data Direction register */
#define PIT_68230_PBDDR 0x03 /* Port B Data Direction register */
#define PIT_68230_PCDDR 0x04 /* Port C Data Direction register */
#define PIT_68230_PIVR 0x05 /* Port Interrupt vector register */
#define PIT_68230_PACR 0x06 /* Port A Control register */
#define PIT_68230_PBCR 0x07 /* Port B Control register */
#define PIT_68230_PADR 0x08 /* Port A Data register */
#define PIT_68230_PBDR 0x09 /* Port B Data register */
#define PIT_68230_PAAR 0x0a /* Port A Alternate register */
#define PIT_68230_PBAR 0x0b /* Port B Alternate register */
#define PIT_68230_PCDR 0x0c /* Port C Data register */
#define PIT_68230_PSR 0x0d /* Port Status register */
#define PIT_68230_TCR 0x10 /* Timer Control Register */
#define PIT_68230_TIVR 0x11 /* Timer Interrupt Vector Register */
#define PIT_68230_CPRH 0x13 /* Counter Preload Register High */
#define PIT_68230_CPRM 0x14 /* Counter Preload Register Middle */
#define PIT_68230_CPRL 0x15 /* Counter Preload Register Low */
#define PIT_68230_CNTRH 0x17 /* Counter Register High */
#define PIT_68230_CNTRM 0x18 /* Counter Register Middle */
#define PIT_68230_CNTRL 0x19 /* Counter Register Low */
#define PIT_68230_TSR 0x1A /* Timer Status Register */
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> pit68230_device
class pit68230_device : public device_t
{
public:
// construction/destruction
pit68230_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
static void set_internal_clock(device_t &device, double clock) { downcast<pit68230_device &>(device).m_internal_clock = clock; }
static void set_external_clock(device_t &device, double clock) { downcast<pit68230_device &>(device).m_external_clock = clock; }
template<class _Object> static devcb_base &set_out0_callback(device_t &device, _Object object) { return downcast<pit68230_device &>(device).m_out0_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out1_callback(device_t &device, _Object object) { return downcast<pit68230_device &>(device).m_out1_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out2_callback(device_t &device, _Object object) { return downcast<pit68230_device &>(device).m_out2_cb.set_callback(object); }
template<class _Object> static devcb_base &set_irq_callback(device_t &device, _Object object) { return downcast<pit68230_device &>(device).m_irq_cb.set_callback(object); }
int status(int clock) const { return m_enabled[clock]; } // get whether timer is enabled
int irq_state() const { return m_IRQ; } // get IRQ state
UINT16 count(int counter) const { return compute_counter(counter); } // get counter value
void set_ext_clock(int counter, double clock); // set clock frequency
int ext_clock(int counter) const { return m_external_clock[counter]; } // get clock frequency
DECLARE_WRITE8_MEMBER( write );
void write(offs_t offset, UINT8 data) { write(machine().driver_data()->generic_space(), offset, data); }
DECLARE_READ8_MEMBER( read );
UINT8 read(offs_t offset) { return read(machine().driver_data()->generic_space(), offset); }
void set_gate(int idx, int state);
DECLARE_WRITE_LINE_MEMBER( set_g1 );
DECLARE_WRITE_LINE_MEMBER( set_g2 );
DECLARE_WRITE_LINE_MEMBER( set_g3 );
void set_clock(int idx, int state);
DECLARE_WRITE_LINE_MEMBER( set_c1 );
DECLARE_WRITE_LINE_MEMBER( set_c2 );
DECLARE_WRITE_LINE_MEMBER( set_c3 );
void update_interrupts();
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
private:
void subtract_from_counter(int counter, int count);
void tick(int counter, int count);
void timeout(int idx);
UINT16 compute_counter(int counter) const;
void reload_count(int idx);
/*
enum
{
PTM_6840_CTRL1 = 0,
PTM_6840_CTRL2 = 1,
PTM_6840_STATUS = 1,
PTM_6840_MSBBUF1 = 2,
PTM_6840_LSB1 = 3,
PTM_6840_MSBBUF2 = 4,
PTM_6840_LSB2 = 5,
PTM_6840_MSBBUF3 = 6,
PTM_6840_LSB3 = 7,
};
*/
double m_internal_clock;
double m_external_clock[3];
devcb_write8 m_out0_cb;
devcb_write8 m_out1_cb;
devcb_write8 m_out2_cb;
devcb_write_line m_irq_cb; // function called if IRQ line changes
UINT8 m_control_reg[3];
UINT8 m_output[3]; // Output states
UINT8 m_gate[3]; // Input gate states
UINT8 m_clk; // Clock states
UINT8 m_enabled[3];
UINT8 m_mode[3];
UINT8 m_fired[3];
UINT8 m_t3_divisor;
UINT8 m_t3_scaler;
UINT8 m_IRQ;
UINT8 m_status_reg;
UINT8 m_status_read_since_int;
UINT8 m_lsb_buffer;
UINT8 m_msb_buffer;
// Each PTM has 3 timers
emu_timer *m_timer[3];
UINT16 m_latch[3];
UINT16 m_counter[3];
static const char *const opmode[];
};
// device type definition
extern const device_type PIT68230;
#endif // __68230PTI__