// license:BSD-3-Clause // copyright-holders:Wilbert Pol #ifndef MAME_BUS_ISA_EGA_H #define MAME_BUS_ISA_EGA_H #pragma once #include "isa.h" #include "video/crtc_ega.h" #include "emupal.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, const char *tag, device_t *owner, uint32_t clock); uint8_t read(offs_t offset); void write(offs_t offset, uint8_t data); uint8_t pc_ega8_3b0_r(offs_t offset); void pc_ega8_3b0_w(offs_t offset, uint8_t data); uint8_t pc_ega8_3c0_r(offs_t offset); void pc_ega8_3c0_w(offs_t offset, uint8_t data); uint8_t pc_ega8_3d0_r(offs_t offset); void pc_ega8_3d0_w(offs_t offset, uint8_t data); CRTC_EGA_ROW_UPDATE(pc_ega_graphics); CRTC_EGA_ROW_UPDATE(pc_ega_text); protected: isa8_ega_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock); // device-level overrides virtual void device_start() override; virtual void device_reset() 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; uint8_t alu_op( uint8_t data, uint8_t latch_data ); private: 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); public: required_device m_crtc_ega; void install_banks(); void change_mode(); void pc_ega8_3X0_w(offs_t offset, uint8_t data); uint8_t pc_ega8_3X0_r(offs_t offset); /* Video memory and related variables */ std::unique_ptr m_vram; uint8_t *m_plane[4]; uint8_t m_read_latch[4]; uint8_t *m_videoram; uint8_t *m_charA; uint8_t *m_charB; /* Registers */ uint8_t m_misc_output; uint8_t m_feature_control; /* Attribute registers AR00 - AR14 */ struct { uint8_t index; uint8_t data[32]; uint8_t index_write; } m_attribute; /* Sequencer registers SR00 - SR04 */ struct { uint8_t index; uint8_t data[8]; } m_sequencer; /* Graphics controller registers GR00 - GR08 */ struct { uint8_t index; uint8_t data[16]; } m_graphics_controller; uint8_t m_frame_cnt; uint8_t m_hsync; uint8_t m_vsync; uint8_t m_vblank; uint8_t m_display_enable; int m_video_mode; required_device m_palette; }; // device type definition DECLARE_DEVICE_TYPE(ISA8_EGA, isa8_ega_device) #endif // MAME_BUS_ISA_EGA_H