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// license:BSD-3-Clause
// copyright-holders:R. Belmont
/*********************************************************************
a2videoterm.h
Implementation of the Apple II Memory Expansion Card
*********************************************************************/
#ifndef MAME_BUS_A2BUS_A2VIDEOTERM_H
#define MAME_BUS_A2BUS_A2VIDEOTERM_H
#pragma once
#include "a2bus.h"
#include "video/mc6845.h"
#include "emupal.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class a2bus_videx80_device:
public device_t,
public device_a2bus_card_interface
{
protected:
// construction/destruction
a2bus_videx80_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_add_mconfig(machine_config &config) override;
// overrides of standard a2bus slot functions
virtual uint8_t read_c0nx(uint8_t offset) override;
virtual void write_c0nx(uint8_t offset, uint8_t data) override;
virtual uint8_t read_cnxx(uint8_t offset) override;
virtual void write_cnxx(uint8_t offset, uint8_t data) override;
virtual uint8_t read_c800(uint16_t offset) override;
virtual void write_c800(uint16_t offset, uint8_t data) override;
uint8_t *m_rom, *m_chrrom;
uint8_t m_ram[512*4];
int m_framecnt;
required_device<mc6845_device> m_crtc;
required_device<palette_device> m_palette;
private:
DECLARE_WRITE_LINE_MEMBER(vsync_changed);
MC6845_UPDATE_ROW(crtc_update_row);
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_t clock);
virtual const tiny_rom_entry *device_rom_region() const override;
};
class a2bus_ap16_device : public a2bus_videx80_device
{
public:
a2bus_ap16_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
virtual const tiny_rom_entry *device_rom_region() const override;
protected:
virtual uint8_t read_cnxx(uint8_t offset) override;
};
class a2bus_ap16alt_device : public a2bus_videx80_device
{
public:
a2bus_ap16alt_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
virtual const tiny_rom_entry *device_rom_region() const override;
protected:
virtual uint8_t read_cnxx(uint8_t offset) override;
};
class a2bus_vtc1_device : public a2bus_videx80_device
{
public:
a2bus_vtc1_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
virtual const tiny_rom_entry *device_rom_region() const override;
};
class a2bus_vtc2_device : public a2bus_videx80_device
{
public:
a2bus_vtc2_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
virtual const tiny_rom_entry *device_rom_region() const override;
};
class a2bus_aevm80_device : public a2bus_videx80_device
{
public:
a2bus_aevm80_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
virtual const tiny_rom_entry *device_rom_region() const override;
};
// device type definition
DECLARE_DEVICE_TYPE(A2BUS_VIDEOTERM, a2bus_videoterm_device)
DECLARE_DEVICE_TYPE(A2BUS_IBSAP16, a2bus_ap16_device)
DECLARE_DEVICE_TYPE(A2BUS_IBSAP16ALT, a2bus_ap16alt_device)
DECLARE_DEVICE_TYPE(A2BUS_VTC1, a2bus_vtc1_device)
DECLARE_DEVICE_TYPE(A2BUS_VTC2, a2bus_vtc2_device)
DECLARE_DEVICE_TYPE(A2BUS_AEVIEWMASTER80, a2bus_aevm80_device)
#endif // MAME_BUS_A2BUS_A2VIDEOTERM_H
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