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/*
pc cga/mda combi adapters
one type hardware switchable between cga and mda/hercules
another type software switchable between cga and mda/hercules
some support additional modes like
commodore pc10 320x200 in 16 colors
// aga
// 256 8x8 thick chars
// 256 8x8 thin chars
// 256 9x14 in 8x16 chars, line 3 is connected to a10
ROM_LOAD("aga.chr", 0x00000, 0x02000, CRC(aca81498))
// hercules font of above
ROM_LOAD("hercules.chr", 0x00000, 0x1000, CRC(7e8c9d76))
*/
#ifndef __ISA_AGA_H__
#define __ISA_AGA_H__
#include "emu.h"
#include "isa.h"
#include "cga.h"
#include "video/mc6845.h"
enum AGA_MODE { AGA_OFF, AGA_COLOR, AGA_MONO };
// ======================> isa8_aga_device
class isa8_aga_device :
public device_t,
public device_isa8_card_interface
{
public:
// construction/destruction
isa8_aga_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
isa8_aga_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source);
// device-level overrides
virtual void device_start();
// optional information overrides
virtual machine_config_constructor device_mconfig_additions() const;
virtual const rom_entry *device_rom_region() const;
virtual ioport_constructor device_input_ports() const;
DECLARE_WRITE_LINE_MEMBER( hsync_changed );
DECLARE_WRITE_LINE_MEMBER( vsync_changed );
DECLARE_READ8_MEMBER( pc_aga_mda_r );
DECLARE_WRITE8_MEMBER( pc_aga_mda_w );
DECLARE_READ8_MEMBER( pc_aga_cga_r );
DECLARE_WRITE8_MEMBER( pc_aga_cga_w );
void set_palette_luts(void);
void pc_aga_set_mode(AGA_MODE mode);
DECLARE_WRITE8_MEMBER( pc_aga_videoram_w );
DECLARE_READ8_MEMBER( pc_aga_videoram_r );
required_device<palette_device> m_palette;
required_device<mc6845_device> m_mc6845;
required_ioport m_cga_config;
mc6845_update_row_func m_update_row;
AGA_MODE m_mode;
UINT8 m_mda_mode_control;
UINT8 m_mda_status;
UINT8 *m_mda_chr_gen;
UINT8 m_cga_mode_control;
UINT8 m_cga_color_select;
UINT8 m_cga_status;
UINT8 *m_cga_chr_gen;
int m_framecnt;
UINT8 m_vsync;
UINT8 m_hsync;
UINT8 m_cga_palette_lut_2bpp[4];
UINT8 *m_videoram;
};
// device type definition
extern const device_type ISA8_AGA;
// ======================> isa8_aga_pc200_device
class isa8_aga_pc200_device :
public isa8_aga_device
{
public:
// construction/destruction
isa8_aga_pc200_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// device-level overrides
virtual void device_start();
// optional information overrides
virtual const rom_entry *device_rom_region() const;
UINT8 m_port8;
UINT8 m_portd;
UINT8 m_porte;
DECLARE_READ8_MEMBER( pc200_videoram_r );
DECLARE_WRITE8_MEMBER( pc200_videoram_w );
DECLARE_WRITE8_MEMBER( pc200_cga_w );
DECLARE_READ8_MEMBER( pc200_cga_r );
};
// device type definition
extern const device_type ISA8_AGA_PC200;
#endif
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