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/***************************************************************************
mos656x.h - Minimal VIC emulation
-------------------
begin : Wed May 21 2001
copyright : (C) 2001 by Simon White
email : s_a_white@email.com
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef _mos656x_h_
#define _mos656x_h_
#include "component.h"
#include "event.h"
typedef enum
{
MOS6567R56A, /* OLD NTSC CHIP */
MOS6567R8, /* NTSC */
MOS6569 /* PAL */
} mos656x_model_t;
class MOS656X: public component, public Event
{
private:
static const char *credit;
protected:
uint8_t regs[0x40];
uint8_t icr, idr, ctrl1;
uint_least16_t yrasters, xrasters, raster_irq;
uint_least16_t raster_x, raster_y;
uint_least16_t first_dma_line, last_dma_line, y_scroll;
bool bad_lines_enabled, bad_line;
event_clock_t m_accessClk;
EventContext &event_context;
protected:
MOS656X (EventContext *context);
void event (void);
void trigger (int irq);
// Environment Interface
virtual void interrupt (bool state) = 0;
virtual void busaccess (bool state) = 0;
virtual void addrctrl (bool state) = 0;
public:
void chip (mos656x_model_t model);
// Component Standard Calls
void reset (void);
uint8_t read (uint_least8_t addr);
void write (uint_least8_t addr, uint8_t data);
const char *credits (void) {return credit;}
};
/***************************************************************************
* Inline functions
**************************************************************************/
enum
{
MOS656X_INTERRUPT_RST = 1 << 0,
MOS656X_INTERRUPT_REQUEST = 1 << 7
};
#endif // _mos656x_h_
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