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// license:BSD-3-Clause
// copyright-holders:Wilbert Pol
/*
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", 0x0000, 0x2000, CRC(aca81498) SHA1(0d84c89487ee7a6ac4c9e73fdb30c5fd8aa595f8) )
// hercules font of above
ROM_LOAD("hercules.chr", 0x0000, 0x1000, CRC(7e8c9d76))
*/
#ifndef MAME_BUS_ISA_AGA_H
#define MAME_BUS_ISA_AGA_H
#include "isa.h"
#include "cga.h"
#include "video/mc6845.h"
#include "emupal.h"
class isa8_aga_device :
public device_t,
public device_isa8_card_interface
{
public:
enum mode_t { AGA_OFF, AGA_COLOR, AGA_MONO };
// construction/destruction
isa8_aga_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
protected:
isa8_aga_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
uint8_t pc_aga_mda_r(offs_t offset);
void pc_aga_mda_w(offs_t offset, uint8_t data);
uint8_t pc_aga_cga_r(offs_t offset);
void pc_aga_cga_w(offs_t offset, uint8_t data);
void set_palette_luts();
void pc_aga_set_mode(mode_t mode);
void pc_aga_videoram_w(offs_t offset, uint8_t data);
uint8_t pc_aga_videoram_r(offs_t offset);
MC6845_UPDATE_ROW( aga_update_row );
MC6845_UPDATE_ROW( mda_text_inten_update_row );
MC6845_UPDATE_ROW( mda_text_blink_update_row );
MC6845_UPDATE_ROW( cga_text_inten_update_row );
MC6845_UPDATE_ROW( cga_text_inten_alt_update_row );
MC6845_UPDATE_ROW( cga_text_blink_update_row );
MC6845_UPDATE_ROW( cga_text_blink_alt_update_row );
MC6845_UPDATE_ROW( cga_gfx_4bppl_update_row );
MC6845_UPDATE_ROW( cga_gfx_4bpph_update_row );
MC6845_UPDATE_ROW( cga_gfx_2bpp_update_row );
MC6845_UPDATE_ROW( cga_gfx_1bpp_update_row );
DECLARE_WRITE_LINE_MEMBER( hsync_changed );
DECLARE_WRITE_LINE_MEMBER( vsync_changed );
required_device<palette_device> m_palette;
required_device<mc6845_device> m_mc6845;
// device-level overrides
virtual void device_start() override;
// optional information overrides
virtual void device_add_mconfig(machine_config &config) override;
virtual const tiny_rom_entry *device_rom_region() const override;
virtual ioport_constructor device_input_ports() const override;
required_ioport m_cga_config;
int m_update_row_type;
mode_t m_mode;
uint8_t m_mda_mode_control;
uint8_t m_mda_status;
uint8_t *m_mda_chr_gen;
uint8_t m_cga_mode_control;
uint8_t m_cga_color_select;
uint8_t m_cga_status;
uint8_t *m_cga_chr_gen;
int m_framecnt;
uint8_t m_vsync;
uint8_t m_hsync;
uint8_t m_cga_palette_lut_2bpp[4];
std::unique_ptr<uint8_t[]> m_videoram;
};
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_t clock);
protected:
uint8_t pc200_videoram_r(offs_t offset);
void pc200_videoram_w(offs_t offset, uint8_t data);
void pc200_cga_w(offs_t offset, uint8_t data);
uint8_t pc200_cga_r(offs_t offset);
// device-level overrides
virtual const tiny_rom_entry *device_rom_region() const override;
virtual void device_start() override;
uint8_t m_port8;
uint8_t m_portd;
uint8_t m_porte;
};
DECLARE_DEVICE_TYPE(ISA8_AGA, isa8_aga_device)
DECLARE_DEVICE_TYPE(ISA8_AGA_PC200, isa8_aga_pc200_device)
#endif // MAME_BUS_ISA_AGA_H
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