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mc6845.c: Converted to C++. [Wilbert Pol]
This commit is contained in:
Wilbert Pol
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@ -10,113 +10,341 @@
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#ifndef __MC6845__
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#define __MC6845__
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#include "devlegcy.h"
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#include "emu.h"
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#include "machine/devhelpr.h"
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DECLARE_LEGACY_DEVICE(MC6845, mc6845);
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DECLARE_LEGACY_DEVICE(MC6845_1, mc6845_1);
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DECLARE_LEGACY_DEVICE(R6545_1, r6545_1);
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DECLARE_LEGACY_DEVICE(C6545_1, c6545_1);
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DECLARE_LEGACY_DEVICE(H46505, h46505);
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DECLARE_LEGACY_DEVICE(HD6845, hd6845);
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DECLARE_LEGACY_DEVICE(SY6545_1, sy6545_1);
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DECLARE_LEGACY_DEVICE(SY6845E, sy6845e);
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#define MC6845_INTERFACE(name) \
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const mc6845_interface (name) =
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#define MCFG_MC6845_ADD(_tag, _variant, _clock, _config) \
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MCFG_DEVICE_ADD(_tag, _variant, _clock) \
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MCFG_DEVICE_CONFIG(_config)
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/* callback definitions */
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typedef void * (*mc6845_begin_update_func)(device_t *device, bitmap_t *bitmap, const rectangle *cliprect);
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#define MC6845_BEGIN_UPDATE(name) void *name(device_t *device, bitmap_t *bitmap, const rectangle *cliprect)
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class mc6845_device;
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typedef void (*mc6845_update_row_func)(device_t *device, bitmap_t *bitmap,
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/* callback definitions */
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typedef void * (*mc6845_begin_update_func)(mc6845_device *device, bitmap_t *bitmap, const rectangle *cliprect);
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#define MC6845_BEGIN_UPDATE(name) void *name(mc6845_device *device, bitmap_t *bitmap, const rectangle *cliprect)
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typedef void (*mc6845_update_row_func)(mc6845_device *device, bitmap_t *bitmap,
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const rectangle *cliprect, UINT16 ma, UINT8 ra,
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UINT16 y, UINT8 x_count, INT8 cursor_x, void *param);
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#define MC6845_UPDATE_ROW(name) void name(device_t *device, bitmap_t *bitmap, \
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#define MC6845_UPDATE_ROW(name) void name(mc6845_device *device, bitmap_t *bitmap, \
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const rectangle *cliprect, UINT16 ma, UINT8 ra, \
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UINT16 y, UINT8 x_count, INT8 cursor_x, void *param)
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typedef void (*mc6845_end_update_func)(device_t *device, bitmap_t *bitmap, const rectangle *cliprect, void *param);
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#define MC6845_END_UPDATE(name) void name(device_t *device, bitmap_t *bitmap, const rectangle *cliprect, void *param)
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typedef void (*mc6845_on_update_addr_changed_func)(device_t *device, int address, int strobe);
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#define MC6845_ON_UPDATE_ADDR_CHANGED(name) void name(device_t *device, int address, int strobe)
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typedef void (*mc6845_end_update_func)(mc6845_device *device, bitmap_t *bitmap, const rectangle *cliprect, void *param);
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#define MC6845_END_UPDATE(name) void name(mc6845_device *device, bitmap_t *bitmap, const rectangle *cliprect, void *param)
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typedef void (*mc6845_on_update_addr_changed_func)(mc6845_device *device, int address, int strobe);
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#define MC6845_ON_UPDATE_ADDR_CHANGED(name) void name(mc6845_device *device, int address, int strobe)
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/* interface */
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typedef struct _mc6845_interface mc6845_interface;
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struct _mc6845_interface
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{
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const char *screen_tag; /* screen we are acting on */
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int hpixels_per_column; /* number of pixels per video memory address */
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const char *m_screen_tag; /* screen we are acting on */
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int m_hpixels_per_column; /* number of pixels per video memory address */
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/* if specified, this gets called before any pixel update,
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optionally return a pointer that will be passed to the
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update and tear down callbacks */
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mc6845_begin_update_func begin_update;
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mc6845_begin_update_func m_begin_update;
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/* this gets called for every row, the driver must output
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x_count * hpixels_per_column pixels.
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cursor_x indicates the character position where the cursor is, or -1
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if there is no cursor on this row */
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mc6845_update_row_func update_row;
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mc6845_update_row_func m_update_row;
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/* if specified, this gets called after all row updating is complete */
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mc6845_end_update_func end_update;
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mc6845_end_update_func m_end_update;
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/* if specified, this gets called for every change of the disply enable pin (pin 18) */
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devcb_write_line out_de_func;
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devcb_write_line m_out_de_func;
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/* if specified, this gets called for every change of the cursor pin (pin 19) */
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devcb_write_line out_cur_func;
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devcb_write_line m_out_cur_func;
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/* if specified, this gets called for every change of the HSYNC pin (pin 39) */
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devcb_write_line out_hsync_func;
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devcb_write_line m_out_hsync_func;
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/* if specified, this gets called for every change of the VSYNC pin (pin 40) */
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devcb_write_line out_vsync_func;
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devcb_write_line m_out_vsync_func;
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/* Called whenenever the update address changes
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* For vblank/hblank timing strobe indicates the physical update.
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* vblank/hblank timing not supported yet! */
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mc6845_on_update_addr_changed_func on_update_addr_changed;
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mc6845_on_update_addr_changed_func m_on_update_addr_changed;
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};
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extern const mc6845_interface mc6845_null_interface;
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class mc6845_device : public device_t,
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public mc6845_interface
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{
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friend class mc6845_1_device;
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friend class r6545_1_device;
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friend class c6545_1_device;
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friend class h46505_device;
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friend class hd6845_device;
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friend class sy6545_1_device;
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friend class sy6845e_device;
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public:
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// construction/destruction
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mc6845_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
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mc6845_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock);
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/* select one of the registers for reading or writing */
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void address_w(UINT8 data);
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/* read from the status register */
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UINT8 status_r();
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/* read from the currently selected register */
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UINT8 register_r();
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/* write to the currently selected register */
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void register_w(UINT8 data);
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/* return the current value on the MA0-MA13 pins */
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UINT16 get_ma();
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/* return the current value on the RA0-RA4 pins */
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UINT8 get_ra();
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/* simulates the LO->HI clocking of the light pen pin (pin 3) */
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void assert_light_pen_input();
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/* set the clock (pin 21) of the chip */
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void set_clock(int clock);
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/* set number of pixels per video memory address */
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void set_hpixels_per_column(int hpixels_per_column);
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/* updates the screen -- this will call begin_update(),
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followed by update_row() reapeatedly and after all row
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updating is complete, end_update() */
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void update(bitmap_t *bitmap, const rectangle *cliprect);
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protected:
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// device-level overrides
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virtual void device_config_complete();
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virtual void device_start();
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virtual void device_reset();
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virtual void device_post_load();
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virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
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private:
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bool m_supports_disp_start_addr_r;
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bool m_supports_vert_sync_width;
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bool m_supports_status_reg_d5;
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bool m_supports_status_reg_d6;
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bool m_supports_status_reg_d7;
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bool m_supports_transparent;
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devcb_resolved_write_line m_res_out_de_func;
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devcb_resolved_write_line m_res_out_cur_func;
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devcb_resolved_write_line m_res_out_hsync_func;
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devcb_resolved_write_line m_res_out_vsync_func;
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int m_device_type;
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screen_device *m_screen;
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/* register file */
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UINT8 m_horiz_char_total; /* 0x00 */
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UINT8 m_horiz_disp; /* 0x01 */
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UINT8 m_horiz_sync_pos; /* 0x02 */
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UINT8 m_sync_width; /* 0x03 */
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UINT8 m_vert_char_total; /* 0x04 */
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UINT8 m_vert_total_adj; /* 0x05 */
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UINT8 m_vert_disp; /* 0x06 */
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UINT8 m_vert_sync_pos; /* 0x07 */
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UINT8 m_mode_control; /* 0x08 */
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UINT8 m_max_ras_addr; /* 0x09 */
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UINT8 m_cursor_start_ras; /* 0x0a */
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UINT8 m_cursor_end_ras; /* 0x0b */
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UINT16 m_disp_start_addr; /* 0x0c/0x0d */
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UINT16 m_cursor_addr; /* 0x0e/0x0f */
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UINT16 m_light_pen_addr; /* 0x10/0x11 */
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UINT16 m_update_addr; /* 0x12/0x13 */
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/* other internal state */
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UINT8 m_register_address_latch;
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bool m_cursor_state;
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UINT8 m_cursor_blink_count;
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bool m_update_ready_bit;
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/* output signals */
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int m_cur;
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int m_hsync;
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int m_vsync;
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int m_de;
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/* internal counters */
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UINT8 m_character_counter; /* Not used yet */
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UINT8 m_hsync_width_counter; /* Not used yet */
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UINT8 m_line_counter;
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UINT8 m_raster_counter;
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UINT8 m_adjust_counter;
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UINT8 m_vsync_width_counter;
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bool m_line_enable_ff; /* Internal flip flop which is set when the line_counter is reset and reset when vert_disp is reached */
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UINT8 m_vsync_ff;
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UINT8 m_adjust_active;
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UINT16 m_line_address;
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INT16 m_cursor_x;
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/* timers */
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static const device_timer_id TIMER_LINE = 0;
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static const device_timer_id TIMER_DE_OFF = 1;
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static const device_timer_id TIMER_CUR_ON = 2;
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static const device_timer_id TIMER_CUR_OFF = 3;
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static const device_timer_id TIMER_HSYNC_ON = 4;
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static const device_timer_id TIMER_HSYNC_OFF = 5;
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static const device_timer_id TIMER_LIGHT_PEN_LATCH = 6;
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static const device_timer_id TIMER_UPD_ADR = 7;
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static const device_timer_id TIMER_UPD_TRANS = 8;
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emu_timer *m_line_timer;
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emu_timer *m_de_off_timer;
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emu_timer *m_cur_on_timer;
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emu_timer *m_cur_off_timer;
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emu_timer *m_hsync_on_timer;
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emu_timer *m_hsync_off_timer;
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emu_timer *m_light_pen_latch_timer;
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emu_timer *m_upd_adr_timer;
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emu_timer *m_upd_trans_timer;
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/* computed values - do NOT state save these! */
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/* These computed are used to define the screen parameters for a driver */
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UINT16 m_horiz_pix_total;
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UINT16 m_vert_pix_total;
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UINT16 m_max_visible_x;
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UINT16 m_max_visible_y;
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UINT16 m_hsync_on_pos;
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UINT16 m_hsync_off_pos;
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UINT16 m_vsync_on_pos;
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UINT16 m_vsync_off_pos;
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bool m_has_valid_parameters;
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UINT16 m_current_disp_addr; /* the display address currently drawn (used only in mc6845_update) */
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bool m_light_pen_latched;
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attotime m_upd_time;
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void update_upd_adr_timer();
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void call_on_update_address(int strobe);
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void recompute_parameters(bool postload);
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void update_counters();
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void set_de(int state);
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void set_hsync(int state);
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void set_vsync(int state);
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void set_cur(int state);
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void handle_line_timer();
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void update_cursor_state();
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};
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class mc6845_1_device : public mc6845_device
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{
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public:
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mc6845_1_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
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protected:
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virtual void device_start();
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virtual void device_reset();
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};
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class r6545_1_device : public mc6845_device
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{
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public:
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r6545_1_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
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protected:
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virtual void device_start();
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virtual void device_reset();
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};
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class c6545_1_device : public mc6845_device
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{
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public:
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c6545_1_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
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protected:
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virtual void device_start();
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virtual void device_reset();
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};
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class h46505_device : public mc6845_device
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{
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public:
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h46505_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
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protected:
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virtual void device_start();
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virtual void device_reset();
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};
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class hd6845_device : public mc6845_device
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{
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public:
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hd6845_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
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protected:
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virtual void device_start();
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virtual void device_reset();
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};
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class sy6545_1_device : public mc6845_device
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{
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public:
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sy6545_1_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
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protected:
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virtual void device_start();
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virtual void device_reset();
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};
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class sy6845e_device : public mc6845_device
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{
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public:
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sy6845e_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
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protected:
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virtual void device_start();
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virtual void device_reset();
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};
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extern const device_type MC6845;
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extern const device_type MC6845_1;
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extern const device_type R6545_1;
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extern const device_type C6545_1;
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extern const device_type H46505;
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extern const device_type HD6845;
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extern const device_type SY6545_1;
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extern const device_type SY6845E;
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/* select one of the registers for reading or writing */
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WRITE8_DEVICE_HANDLER( mc6845_address_w );
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/* read from the status register */
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READ8_DEVICE_HANDLER( mc6845_status_r );
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/* read from the currently selected register */
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READ8_DEVICE_HANDLER( mc6845_register_r );
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/* write to the currently selected register */
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WRITE8_DEVICE_HANDLER( mc6845_register_w );
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/* return the current value on the MA0-MA13 pins */
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UINT16 mc6845_get_ma(device_t *device);
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/* return the current value on the RA0-RA4 pins */
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UINT8 mc6845_get_ra(device_t *device);
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/* simulates the LO->HI clocking of the light pen pin (pin 3) */
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void mc6845_assert_light_pen_input(device_t *device);
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/* set the clock (pin 21) of the chip */
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void mc6845_set_clock(device_t *device, int clock);
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/* set number of pixels per video memory address */
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void mc6845_set_hpixels_per_column(device_t *device, int hpixels_per_column);
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/* updates the screen -- this will call begin_update(),
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followed by update_row() reapeatedly and after all row
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updating is complete, end_update() */
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void mc6845_update(device_t *device, bitmap_t *bitmap, const rectangle *cliprect);
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#endif
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