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// license:BSD-3-Clause
// copyright-holders:Wilbert Pol
#pragma once
#ifndef __ISA_EGA_H__
#define __ISA_EGA_H__
#include "emu.h"
#include "isa.h"
#include "video/crtc_ega.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> isa8_ega_device
class isa8_ega_device :
public device_t,
public device_isa8_card_interface
{
public:
// construction/destruction
isa8_ega_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock);
isa8_ega_device(const machine_config &mconfig, device_type type, const char *name, std::string tag, device_t *owner, UINT32 clock, const char *shortname, const char *source);
// optional information overrides
virtual machine_config_constructor device_mconfig_additions() const override;
virtual const rom_entry *device_rom_region() const override;
virtual ioport_constructor device_input_ports() const override;
DECLARE_READ8_MEMBER(read);
DECLARE_WRITE8_MEMBER(write);
DECLARE_READ8_MEMBER(pc_ega8_3b0_r);
DECLARE_WRITE8_MEMBER(pc_ega8_3b0_w);
DECLARE_READ8_MEMBER(pc_ega8_3c0_r);
DECLARE_WRITE8_MEMBER(pc_ega8_3c0_w);
DECLARE_READ8_MEMBER(pc_ega8_3d0_r);
DECLARE_WRITE8_MEMBER(pc_ega8_3d0_w);
DECLARE_WRITE_LINE_MEMBER(de_changed);
DECLARE_WRITE_LINE_MEMBER(hsync_changed);
DECLARE_WRITE_LINE_MEMBER(vsync_changed);
DECLARE_WRITE_LINE_MEMBER(vblank_changed);
CRTC_EGA_ROW_UPDATE(ega_update_row);
CRTC_EGA_ROW_UPDATE(pc_ega_graphics);
CRTC_EGA_ROW_UPDATE(pc_ega_text);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
UINT8 alu_op( UINT8 data, UINT8 latch_data );
public:
crtc_ega_device *m_crtc_ega;
void install_banks();
void change_mode();
DECLARE_WRITE8_MEMBER(pc_ega8_3X0_w);
DECLARE_READ8_MEMBER(pc_ega8_3X0_r);
/* Video memory and related variables */
memory_region *m_vram;
UINT8 *m_plane[4];
UINT8 m_read_latch[4];
UINT8 *m_videoram;
UINT8 *m_charA;
UINT8 *m_charB;
/* Registers */
UINT8 m_misc_output;
UINT8 m_feature_control;
/* Attribute registers AR00 - AR14
*/
struct {
UINT8 index;
UINT8 data[32];
UINT8 index_write;
} m_attribute;
/* Sequencer registers SR00 - SR04
*/
struct {
UINT8 index;
UINT8 data[8];
} m_sequencer;
/* Graphics controller registers GR00 - GR08
*/
struct {
UINT8 index;
UINT8 data[16];
} m_graphics_controller;
UINT8 m_frame_cnt;
UINT8 m_hsync;
UINT8 m_vsync;
UINT8 m_vblank;
UINT8 m_display_enable;
int m_video_mode;
required_device<palette_device> m_palette;
};
// device type definition
extern const device_type ISA8_EGA;
#endif /* __ISA_EGA_H__ */
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