// license:BSD-3-Clause // copyright-holders:Wilbert Pol /********************************************************************** Motorola MC6845 and compatible CRT controller emulation **********************************************************************/ #ifndef __MC6845__ #define __MC6845__ #include "emu.h" #define MCFG_MC6845_ADD(_tag, _variant, _screen_tag, _clock) \ MCFG_DEVICE_ADD(_tag, _variant, _clock) \ MCFG_VIDEO_SET_SCREEN(_screen_tag) #define MCFG_MOS8563_ADD(_tag, _screen_tag, _clock, _map) \ MCFG_DEVICE_ADD(_tag, MOS8563, _clock) \ MCFG_VIDEO_SET_SCREEN(_screen_tag) \ MCFG_DEVICE_ADDRESS_MAP(AS_0, _map) #define MCFG_MOS8568_ADD(_tag, _screen_tag, _clock, _map) \ MCFG_DEVICE_ADD(_tag, MOS8568, _clock) \ MCFG_VIDEO_SET_SCREEN(_screen_tag) \ MCFG_DEVICE_ADDRESS_MAP(AS_0, _map) #define MCFG_MC6845_SHOW_BORDER_AREA(_show) \ mc6845_device::set_show_border_area(*device, _show); #define MCFG_MC6845_INTERLACE_ADJUST(_value) \ mc6845_device::set_interlace_adjust(*device, _value); #define MCFG_MC6845_VISAREA_ADJUST(_minx, _maxx, _miny, _maxy) \ mc6845_device::set_visarea_adjust(*device, _minx, _maxx, _miny, _maxy); #define MCFG_MC6845_CHAR_WIDTH(_pixels) \ mc6845_device::set_char_width(*device, _pixels); #define MCFG_MC6845_BEGIN_UPDATE_CB(_class, _method) \ mc6845_device::set_begin_update_callback(*device, mc6845_begin_update_delegate(&_class::_method, #_class "::" #_method, downcast<_class *>(owner))); #define MCFG_MC6845_UPDATE_ROW_CB(_class, _method) \ mc6845_device::set_update_row_callback(*device, mc6845_update_row_delegate(&_class::_method, #_class "::" #_method, downcast<_class *>(owner))); #define MCFG_MC6845_END_UPDATE_CB(_class, _method) \ mc6845_device::set_end_update_callback(*device, mc6845_end_update_delegate(&_class::_method, #_class "::" #_method, downcast<_class *>(owner))); #define MCFG_MC6845_ADDR_CHANGED_CB(_class, _method) \ mc6845_device::set_on_update_addr_change_callback(*device, mc6845_on_update_addr_changed_delegate(&_class::_method, #_class "::" #_method, downcast<_class *>(owner))); #define MCFG_MC6845_OUT_DE_CB(_write) \ devcb = &mc6845_device::set_out_de_callback(*device, DEVCB_##_write); #define MCFG_MC6845_OUT_CUR_CB(_write) \ devcb = &mc6845_device::set_out_cur_callback(*device, DEVCB_##_write); #define MCFG_MC6845_OUT_HSYNC_CB(_write) \ devcb = &mc6845_device::set_out_hsync_callback(*device, DEVCB_##_write); #define MCFG_MC6845_OUT_VSYNC_CB(_write) \ devcb = &mc6845_device::set_out_vsync_callback(*device, DEVCB_##_write); /* callback definitions */ typedef device_delegate mc6845_begin_update_delegate; #define MC6845_BEGIN_UPDATE(name) void name(bitmap_rgb32 &bitmap, const rectangle &cliprect) typedef device_delegate mc6845_update_row_delegate; #define MC6845_UPDATE_ROW(name) void name(bitmap_rgb32 &bitmap, const rectangle &cliprect, UINT16 ma, UINT8 ra, \ UINT16 y, UINT8 x_count, INT8 cursor_x, int de, int hbp, int vbp) typedef device_delegate mc6845_end_update_delegate; #define MC6845_END_UPDATE(name) void name(bitmap_rgb32 &bitmap, const rectangle &cliprect) typedef device_delegate mc6845_on_update_addr_changed_delegate; #define MC6845_ON_UPDATE_ADDR_CHANGED(name) void name(int address, int strobe) class mc6845_device : public device_t, public device_video_interface { friend class mc6845_1_device; friend class r6545_1_device; friend class c6545_1_device; friend class h46505_device; friend class hd6845_device; friend class sy6545_1_device; friend class sy6845e_device; friend class hd6345_device; friend class ams40041_device; public: // construction/destruction mc6845_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); mc6845_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); static void set_show_border_area(device_t &device, bool show) { downcast(device).m_show_border_area = show; } static void set_interlace_adjust(device_t &device, int value) { downcast(device).m_interlace_adjust = value; } static void set_visarea_adjust(device_t &device, int min_x, int max_x, int min_y, int max_y) { mc6845_device &dev = downcast(device); dev.m_visarea_adjust_min_x = min_x; dev.m_visarea_adjust_max_x = max_x; dev.m_visarea_adjust_min_y = min_y; dev.m_visarea_adjust_max_y = max_y; } static void set_char_width(device_t &device, int pixels) { downcast(device).m_hpixels_per_column = pixels; } static void set_begin_update_callback(device_t &device, mc6845_begin_update_delegate callback) { downcast(device).m_begin_update_cb = callback; } static void set_update_row_callback(device_t &device, mc6845_update_row_delegate callback) { downcast(device).m_update_row_cb = callback; } static void set_end_update_callback(device_t &device, mc6845_end_update_delegate callback) { downcast(device).m_end_update_cb = callback; } static void set_on_update_addr_change_callback(device_t &device, mc6845_on_update_addr_changed_delegate callback) { downcast(device).m_on_update_addr_changed_cb = callback; } template static devcb_base &set_out_de_callback(device_t &device, _Object object) { return downcast(device).m_out_de_cb.set_callback(object); } template static devcb_base &set_out_cur_callback(device_t &device, _Object object) { return downcast(device).m_out_cur_cb.set_callback(object); } template static devcb_base &set_out_hsync_callback(device_t &device, _Object object) { return downcast(device).m_out_hsync_cb.set_callback(object); } template static devcb_base &set_out_vsync_callback(device_t &device, _Object object) { return downcast(device).m_out_vsync_cb.set_callback(object); } /* select one of the registers for reading or writing */ DECLARE_WRITE8_MEMBER( address_w ); /* read from the status register */ DECLARE_READ8_MEMBER( status_r ); /* read from the currently selected register */ DECLARE_READ8_MEMBER( register_r ); /* write to the currently selected register */ DECLARE_WRITE8_MEMBER( register_w ); // read display enable line state DECLARE_READ_LINE_MEMBER( de_r ); // read cursor line state DECLARE_READ_LINE_MEMBER( cursor_r ); // read horizontal sync line state DECLARE_READ_LINE_MEMBER( hsync_r ); // read vertical sync line state DECLARE_READ_LINE_MEMBER( vsync_r ); /* return the current value on the MA0-MA13 pins */ UINT16 get_ma(); /* return the current value on the RA0-RA4 pins */ UINT8 get_ra(); /* simulates the LO->HI clocking of the light pen pin (pin 3) */ void assert_light_pen_input(); /* set the clock (pin 21) of the chip */ void set_clock(int clock); /* set number of pixels per video memory address */ void set_hpixels_per_column(int hpixels_per_column); /* updates the screen -- this will call begin_update(), followed by update_row() reapeatedly and after all row updating is complete, end_update() */ UINT32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect); protected: // device-level overrides virtual void device_start(); virtual void device_reset(); virtual void device_post_load(); virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr); bool m_supports_disp_start_addr_r; bool m_supports_vert_sync_width; bool m_supports_status_reg_d5; bool m_supports_status_reg_d6; bool m_supports_status_reg_d7; bool m_supports_transparent; /* register file */ UINT8 m_horiz_char_total; /* 0x00 */ UINT8 m_horiz_disp; /* 0x01 */ UINT8 m_horiz_sync_pos; /* 0x02 */ UINT8 m_sync_width; /* 0x03 */ UINT8 m_vert_char_total; /* 0x04 */ UINT8 m_vert_total_adj; /* 0x05 */ UINT8 m_vert_disp; /* 0x06 */ UINT8 m_vert_sync_pos; /* 0x07 */ UINT8 m_mode_control; /* 0x08 */ UINT8 m_max_ras_addr; /* 0x09 */ UINT8 m_cursor_start_ras; /* 0x0a */ UINT8 m_cursor_end_ras; /* 0x0b */ UINT16 m_disp_start_addr; /* 0x0c/0x0d */ UINT16 m_cursor_addr; /* 0x0e/0x0f */ UINT16 m_light_pen_addr; /* 0x10/0x11 */ UINT16 m_update_addr; /* 0x12/0x13 */ /* other internal state */ UINT8 m_register_address_latch; bool m_cursor_state; UINT8 m_cursor_blink_count; bool m_update_ready_bit; /* output signals */ int m_cur; int m_hsync; int m_vsync; int m_de; /* internal counters */ UINT8 m_character_counter; /* Not used yet */ UINT8 m_hsync_width_counter; /* Not used yet */ UINT8 m_line_counter; UINT8 m_raster_counter; UINT8 m_adjust_counter; UINT8 m_vsync_width_counter; bool m_line_enable_ff; /* Internal flip flop which is set when the line_counter is reset and reset when vert_disp is reached */ UINT8 m_vsync_ff; UINT8 m_adjust_active; UINT16 m_line_address; INT16 m_cursor_x; /* timers */ static const device_timer_id TIMER_LINE = 0; static const device_timer_id TIMER_DE_OFF = 1; static const device_timer_id TIMER_CUR_ON = 2; static const device_timer_id TIMER_CUR_OFF = 3; static const device_timer_id TIMER_HSYNC_ON = 4; static const device_timer_id TIMER_HSYNC_OFF = 5; static const device_timer_id TIMER_LIGHT_PEN_LATCH = 6; static const device_timer_id TIMER_UPD_ADR = 7; static const device_timer_id TIMER_UPD_TRANS = 8; emu_timer *m_line_timer; emu_timer *m_de_off_timer; emu_timer *m_cur_on_timer; emu_timer *m_cur_off_timer; emu_timer *m_hsync_on_timer; emu_timer *m_hsync_off_timer; emu_timer *m_light_pen_latch_timer; emu_timer *m_upd_adr_timer; emu_timer *m_upd_trans_timer; /* computed values - do NOT state save these! */ /* These computed are used to define the screen parameters for a driver */ UINT16 m_horiz_pix_total; UINT16 m_vert_pix_total; UINT16 m_max_visible_x; UINT16 m_max_visible_y; UINT16 m_hsync_on_pos; UINT16 m_hsync_off_pos; UINT16 m_vsync_on_pos; UINT16 m_vsync_off_pos; bool m_has_valid_parameters; UINT16 m_current_disp_addr; /* the display address currently drawn (used only in mc6845_update) */ bool m_light_pen_latched; attotime m_upd_time; void update_upd_adr_timer(); void call_on_update_address(int strobe); void recompute_parameters(bool postload); void update_counters(); void set_de(int state); void set_hsync(int state); void set_vsync(int state); void set_cur(int state); void handle_line_timer(); virtual void update_cursor_state(); virtual UINT8 draw_scanline(int y, bitmap_rgb32 &bitmap, const rectangle &cliprect); /************************ interface CRTC - driver ************************/ bool m_show_border_area; /* visible screen area (false) active display (true) active display + blanking */ int m_interlace_adjust; /* adjust max ras in interlace mode */ /* visible screen area adjustment */ int m_visarea_adjust_min_x; int m_visarea_adjust_max_x; int m_visarea_adjust_min_y; int m_visarea_adjust_max_y; int m_hpixels_per_column; /* number of pixels per video memory address */ /* if specified, this gets called before any pixel update, optionally return a pointer that will be passed to the update and tear down callbacks */ mc6845_begin_update_delegate m_begin_update_cb; /* this gets called for every row, the driver must output x_count * hpixels_per_column pixels. cursor_x indicates the character position where the cursor is, or -1 if there is no cursor on this row */ mc6845_update_row_delegate m_update_row_cb; /* if specified, this gets called after all row updating is complete */ mc6845_end_update_delegate m_end_update_cb; /* Called whenever the update address changes * For vblank/hblank timing strobe indicates the physical update. * vblank/hblank timing not supported yet! */ mc6845_on_update_addr_changed_delegate m_on_update_addr_changed_cb; /* if specified, this gets called for every change of the disply enable pin (pin 18) */ devcb_write_line m_out_de_cb; /* if specified, this gets called for every change of the cursor pin (pin 19) */ devcb_write_line m_out_cur_cb; /* if specified, this gets called for every change of the HSYNC pin (pin 39) */ devcb_write_line m_out_hsync_cb; /* if specified, this gets called for every change of the VSYNC pin (pin 40) */ devcb_write_line m_out_vsync_cb; }; class mc6845_1_device : public mc6845_device { public: mc6845_1_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); protected: virtual void device_start(); virtual void device_reset(); }; class r6545_1_device : public mc6845_device { public: r6545_1_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); protected: virtual void device_start(); virtual void device_reset(); }; class c6545_1_device : public mc6845_device { public: c6545_1_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); protected: virtual void device_start(); virtual void device_reset(); }; class h46505_device : public mc6845_device { public: h46505_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); protected: virtual void device_start(); virtual void device_reset(); }; class hd6845_device : public mc6845_device { public: hd6845_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); protected: virtual void device_start(); virtual void device_reset(); }; class sy6545_1_device : public mc6845_device { public: sy6545_1_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); protected: virtual void device_start(); virtual void device_reset(); }; class sy6845e_device : public mc6845_device { public: sy6845e_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); protected: virtual void device_start(); virtual void device_reset(); }; class hd6345_device : public mc6845_device { public: hd6345_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); protected: virtual void device_start(); virtual void device_reset(); }; class ams40041_device : public mc6845_device { public: ams40041_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); protected: virtual void device_start(); virtual void device_reset(); }; class mos8563_device : public mc6845_device, public device_memory_interface { public: mos8563_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); mos8563_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const; DECLARE_PALETTE_INIT(mos8563); DECLARE_WRITE8_MEMBER( address_w ); DECLARE_READ8_MEMBER( status_r ); DECLARE_READ8_MEMBER( register_r ); DECLARE_WRITE8_MEMBER( register_w ); inline UINT8 read_videoram(offs_t offset); inline void write_videoram(offs_t offset, UINT8 data); MC6845_UPDATE_ROW( vdc_update_row ); protected: // device-level overrides virtual machine_config_constructor device_mconfig_additions() const; virtual void device_start(); virtual void device_reset(); virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr); const address_space_config m_videoram_space_config; required_device m_palette; UINT8 m_char_buffer[80]; UINT8 m_attr_buffer[80]; bool m_char_blink_state; UINT8 m_char_blink_count; /* register file */ UINT16 m_attribute_addr; /* 0x14/0x15 */ UINT8 m_horiz_char; /* 0x16 */ UINT8 m_vert_char_disp; /* 0x17 */ UINT8 m_vert_scroll; /* 0x18 */ UINT8 m_horiz_scroll; /* 0x19 */ UINT8 m_color; /* 0x1a */ UINT8 m_row_addr_incr; /* 0x1b */ UINT8 m_char_base_addr; /* 0x1c */ UINT8 m_underline_ras; /* 0x1d */ UINT8 m_word_count; /* 0x1e */ UINT8 m_data; /* 0x1f */ UINT16 m_block_addr; /* 0x20/0x21 */ UINT16 m_de_begin; /* 0x22/0x23 */ UINT8 m_dram_refresh; /* 0x24 */ UINT8 m_sync_polarity; /* 0x25 */ int m_revision; virtual void update_cursor_state(); virtual UINT8 draw_scanline(int y, bitmap_rgb32 &bitmap, const rectangle &cliprect); static const device_timer_id TIMER_BLOCK_COPY = 9; emu_timer *m_block_copy_timer; }; class mos8568_device : public mos8563_device { public: mos8568_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); protected: // device-level overrides virtual void device_start(); virtual void device_reset(); }; extern const device_type MC6845; extern const device_type MC6845_1; extern const device_type R6545_1; extern const device_type C6545_1; extern const device_type H46505; extern const device_type HD6845; extern const device_type SY6545_1; extern const device_type SY6845E; extern const device_type HD6345; extern const device_type AMS40041; extern const device_type MOS8563; extern const device_type MOS8568; #endif