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/*********************************************************************
a2videoterm.h
Implementation of the Apple II Memory Expansion Card
*********************************************************************/
#ifndef __A2BUS_VIDEOTERM__
#define __A2BUS_VIDEOTERM__
#include "emu.h"
#include "machine/a2bus.h"
#include "video/mc6845.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class a2bus_videx80_device:
public device_t,
public device_a2bus_card_interface
{
public:
// construction/destruction
a2bus_videx80_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock);
// optional information overrides
virtual machine_config_constructor device_mconfig_additions() const;
DECLARE_WRITE_LINE_MEMBER(vsync_changed);
UINT8 *m_rom, *m_chrrom;
UINT8 m_ram[512*4];
int m_framecnt;
protected:
virtual void device_start();
virtual void device_reset();
// overrides of standard a2bus slot functions
virtual UINT8 read_c0nx(address_space &space, UINT8 offset);
virtual void write_c0nx(address_space &space, UINT8 offset, UINT8 data);
virtual UINT8 read_cnxx(address_space &space, UINT8 offset);
virtual void write_cnxx(address_space &space, UINT8 offset, UINT8 data);
virtual UINT8 read_c800(address_space &space, UINT16 offset);
virtual void write_c800(address_space &space, UINT16 offset, UINT8 data);
required_device<mc6845_device> m_crtc;
private:
int m_rambank;
};
class a2bus_videoterm_device : public a2bus_videx80_device
{
public:
a2bus_videoterm_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
virtual const rom_entry *device_rom_region() const;
};
class a2bus_ap16_device : public a2bus_videx80_device
{
public:
a2bus_ap16_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
virtual const rom_entry *device_rom_region() const;
virtual UINT8 read_cnxx(address_space &space, UINT8 offset);
};
class a2bus_ap16alt_device : public a2bus_videx80_device
{
public:
a2bus_ap16alt_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
virtual const rom_entry *device_rom_region() const;
virtual UINT8 read_cnxx(address_space &space, UINT8 offset);
};
class a2bus_vtc1_device : public a2bus_videx80_device
{
public:
a2bus_vtc1_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
virtual const rom_entry *device_rom_region() const;
};
class a2bus_vtc2_device : public a2bus_videx80_device
{
public:
a2bus_vtc2_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
virtual const rom_entry *device_rom_region() const;
};
// device type definition
extern const device_type A2BUS_VIDEOTERM;
extern const device_type A2BUS_IBSAP16;
extern const device_type A2BUS_IBSAP16ALT;
extern const device_type A2BUS_VTC1;
extern const device_type A2BUS_VTC2;
#endif /* __A2BUS_VIDEOTERM__ */
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