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https://github.com/holub/mame
synced 2025-05-23 14:19:01 +03:00
mc6845.c: Rewritten to allow mid frame changes to the counter registers. This enables drivers to use advanced
split screen and scrolling effects using a regular mc6845. [Wilbert Pol] Interface change: The screen tag is no longer mandatory. If a screen tag is provided then the mc6845 device will resize the screen and visible area based on the parameters set in the 6845 config and registers. If the screen tag is not provided then the driver is supposed to be in charge of setting the proper screen configuration. Warning: This breaks the relationship between the timing of a screen device and the signals generated by the 6845.
This commit is contained in:
Wilbert Pol
parent
874eb8ae2a
commit
ce3c3205cc
@ -101,41 +101,59 @@ struct _mc6845_t
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UINT8 cursor_state; /* 0 = off, 1 = on */
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UINT8 cursor_blink_count;
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UINT8 update_ready_bit;
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/* output signals */
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int cur;
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int hsync;
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int vsync;
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int de;
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/* internal counters */
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UINT8 character_counter; /* Not used yet */
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UINT8 hsync_width_counter; /* Not used yet */
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UINT8 line_counter;
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UINT8 raster_counter;
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UINT8 adjust_counter;
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UINT8 vsync_width_counter;
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UINT8 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 vsync_ff;
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UINT8 adjust_active;
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UINT16 line_address;
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INT16 cursor_x;
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/* timers */
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emu_timer *de_changed_timer;
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emu_timer *line_timer;
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emu_timer *de_off_timer;
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emu_timer *cur_on_timer;
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emu_timer *cur_off_timer;
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emu_timer *hsync_on_timer;
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emu_timer *hsync_off_timer;
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emu_timer *vsync_on_timer;
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emu_timer *vsync_off_timer;
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emu_timer *light_pen_latch_timer;
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emu_timer *upd_adr_timer;
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/* computed values - do NOT state save these! */
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UINT16 horiz_pix_total;
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UINT16 vert_pix_total;
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UINT16 max_visible_x;
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UINT16 max_visible_y;
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UINT16 hsync_on_pos;
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UINT16 hsync_off_pos;
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UINT16 vsync_on_pos;
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UINT16 vsync_off_pos;
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UINT16 current_disp_addr; /* the display address currently drawn */
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/* These computed are used to define the screen parameters for a driver */
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UINT16 horiz_pix_total;
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UINT16 vert_pix_total;
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UINT16 max_visible_x;
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UINT16 max_visible_y;
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UINT16 hsync_on_pos;
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UINT16 hsync_off_pos;
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UINT16 vsync_on_pos;
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UINT16 vsync_off_pos;
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int has_valid_parameters;
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UINT16 current_disp_addr; /* the display address currently drawn (used only in mc6845_update) */
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UINT8 light_pen_latched;
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attotime upd_time;
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int has_valid_parameters;
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};
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static STATE_POSTLOAD( mc6845_state_save_postload );
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static void recompute_parameters(mc6845_t *mc6845, int postload);
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static void update_upd_adr_timer(mc6845_t *mc6845);
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static void update_de_changed_timer(mc6845_t *mc6845);
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static void update_cur_changed_timers(mc6845_t *mc6845);
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static void update_hsync_changed_timers(mc6845_t *mc6845);
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static void update_vsync_changed_timers(mc6845_t *mc6845);
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static void update_cursor_state(mc6845_t *mc6845);
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const mc6845_interface mc6845_null_interface = { 0 };
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@ -206,7 +224,7 @@ READ8_DEVICE_HANDLER( mc6845_status_r )
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UINT8 ret = 0;
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/* VBLANK bit */
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if (supports_status_reg_d5[mc6845->device_type] && mc6845->screen->vblank())
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if (supports_status_reg_d5[mc6845->device_type] && ( mc6845->line_enable_ff == 0 ))
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ret = ret | 0x20;
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/* light pen latched */
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@ -402,7 +420,8 @@ static void recompute_parameters(mc6845_t *mc6845, int postload)
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if (LOG) logerror("M6845 config screen: HTOTAL: 0x%x VTOTAL: 0x%x MAX_X: 0x%x MAX_Y: 0x%x HSYNC: 0x%x-0x%x VSYNC: 0x%x-0x%x Freq: %ffps\n",
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horiz_pix_total, vert_pix_total, max_visible_x, max_visible_y, hsync_on_pos, hsync_off_pos - 1, vsync_on_pos, vsync_off_pos - 1, 1 / ATTOSECONDS_TO_DOUBLE(refresh));
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mc6845->screen->configure(horiz_pix_total, vert_pix_total, visarea, refresh);
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if ( mc6845->screen != NULL )
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mc6845->screen->configure(horiz_pix_total, vert_pix_total, visarea, refresh);
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mc6845->has_valid_parameters = TRUE;
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}
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@ -417,134 +436,89 @@ static void recompute_parameters(mc6845_t *mc6845, int postload)
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mc6845->hsync_off_pos = hsync_off_pos;
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mc6845->vsync_on_pos = vsync_on_pos;
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mc6845->vsync_off_pos = vsync_off_pos;
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update_de_changed_timer(mc6845);
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update_cur_changed_timers(mc6845);
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update_hsync_changed_timers(mc6845);
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update_vsync_changed_timers(mc6845);
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}
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}
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}
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INLINE int is_display_enabled(mc6845_t *mc6845)
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INLINE void mc6845_update_counters(mc6845_t *mc6845)
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{
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return !mc6845->screen->vblank() && !mc6845->screen->hblank();
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}
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mc6845->character_counter = attotime_to_ticks( timer_timeelapsed( mc6845->line_timer ), mc6845->clock );
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static void update_upd_adr_timer(mc6845_t *mc6845)
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{
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if (!is_display_enabled(mc6845) && supports_transparent[mc6845->device_type])
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timer_adjust_oneshot(mc6845->upd_adr_timer, mc6845->upd_time, 0);
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}
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static void update_de_changed_timer(mc6845_t *mc6845)
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{
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if (mc6845->has_valid_parameters && (mc6845->de_changed_timer != NULL))
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if ( timer_enabled( mc6845->hsync_off_timer ) )
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{
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INT16 next_y;
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UINT16 next_x;
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attotime duration;
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mc6845->hsync_width_counter = attotime_to_ticks( timer_timeelapsed( mc6845->hsync_off_timer ), mc6845->clock );
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}
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}
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/* we are in a display region, get the location of the next blanking start */
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if (is_display_enabled(mc6845))
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INLINE void mc6845_set_de(mc6845_t *mc6845, int state)
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{
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if ( mc6845->de != state )
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{
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mc6845->de = state;
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if ( mc6845->de )
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{
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/* normally, it's at end the current raster line */
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next_y = mc6845->screen->vpos();
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next_x = mc6845->max_visible_x + 1;
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/* but if visible width = horiz_pix_total, then we need
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to go to the beginning of VBLANK */
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if (next_x == mc6845->horiz_pix_total)
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{
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next_y = mc6845->max_visible_y + 1;
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next_x = 0;
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/* abnormal case, no vertical blanking, either */
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if (next_y == mc6845->vert_pix_total)
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next_y = -1;
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}
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if (supports_transparent[mc6845->device_type]) timer_adjust_oneshot(mc6845->upd_adr_timer, attotime_never, 0);
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/* If the upd_adr_timer was running, cancel it */
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timer_adjust_oneshot(mc6845->upd_adr_timer, attotime_never, 0);
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}
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/* we are in a blanking region, get the location of the next display start */
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else
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{
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next_x = 0;
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next_y = (mc6845->screen->vpos() + 1) % mc6845->vert_pix_total;
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/* if we would now fall in the vertical blanking, we need
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to go to the top of the screen */
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if (next_y > mc6845->max_visible_y)
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next_y = 0;
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/* if transparent update was requested fire the update timer */
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if(!mc6845->update_ready_bit)
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update_upd_adr_timer(mc6845);
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}
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if (next_y != -1)
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duration = mc6845->screen->time_until_pos(next_y, next_x);
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else
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duration = attotime_never;
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timer_adjust_oneshot(mc6845->de_changed_timer, duration, 0);
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}
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}
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static void update_cur_changed_timers(mc6845_t *mc6845)
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{
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if (mc6845->has_valid_parameters && (mc6845->cur_on_timer != NULL))
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{
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UINT16 cur_on_row = ((mc6845->cursor_addr - mc6845->disp_start_addr) / mc6845->horiz_disp) * (mc6845->max_ras_addr + 1);
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UINT16 cur_on_y = cur_on_row + mc6845->cursor_start_ras;
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UINT16 cur_off_y = cur_on_row + mc6845->cursor_end_ras;
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UINT16 cur_on_pos = ((mc6845->cursor_addr - mc6845->disp_start_addr) % mc6845->horiz_disp) * mc6845->intf->hpixels_per_column;
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UINT16 cur_off_pos = cur_on_pos + mc6845->intf->hpixels_per_column;
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UINT16 next_y;
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UINT16 y = mc6845->screen->vpos();
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if ((y >= cur_on_y) && (y < cur_off_y))
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next_y = y + 1;
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else
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next_y = cur_on_y;
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timer_adjust_oneshot(mc6845->cur_on_timer, mc6845->screen->time_until_pos(next_y, cur_on_pos) , 0);
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timer_adjust_oneshot(mc6845->cur_off_timer, mc6845->screen->time_until_pos(next_y, cur_off_pos), 0);
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}
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}
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static void update_hsync_changed_timers(mc6845_t *mc6845)
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{
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if (mc6845->has_valid_parameters && (mc6845->hsync_on_timer != NULL))
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{
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UINT16 next_y;
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/* we are before the HSYNC position, we trigger on the current line */
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if (mc6845->screen->hpos() < mc6845->hsync_on_pos)
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next_y = mc6845->screen->vpos();
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/* trigger on the next line */
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else
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next_y = (mc6845->screen->vpos() + 1) % mc6845->vert_pix_total;
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timer_adjust_oneshot(mc6845->hsync_on_timer, mc6845->screen->time_until_pos(next_y, mc6845->hsync_on_pos) , 0);
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timer_adjust_oneshot(mc6845->hsync_off_timer, mc6845->screen->time_until_pos(next_y, mc6845->hsync_off_pos), 0);
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if ( mc6845->out_de_func.target != NULL )
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devcb_call_write_line( &mc6845->out_de_func, mc6845->de );
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}
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}
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static void update_vsync_changed_timers(mc6845_t *mc6845)
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INLINE void mc6845_set_hsync(mc6845_t *mc6845, int state)
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{
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if (mc6845->has_valid_parameters && (mc6845->vsync_on_timer != NULL))
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if ( mc6845->hsync != state )
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{
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timer_adjust_oneshot(mc6845->vsync_on_timer, mc6845->screen->time_until_pos(mc6845->vsync_on_pos), 0);
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timer_adjust_oneshot(mc6845->vsync_off_timer, mc6845->screen->time_until_pos(mc6845->vsync_off_pos), 0);
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mc6845->hsync = state;
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if ( mc6845->out_hsync_func.target != NULL )
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devcb_call_write_line( &mc6845->out_hsync_func, mc6845->hsync );
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}
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}
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INLINE void mc6845_set_vsync(mc6845_t *mc6845, int state)
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{
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if ( mc6845->vsync != state )
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{
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mc6845->vsync = state;
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if ( mc6845->out_vsync_func.target != NULL )
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devcb_call_write_line( &mc6845->out_vsync_func, mc6845->vsync );
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}
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}
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INLINE void mc6845_set_cur(mc6845_t *mc6845, int state)
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{
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if ( mc6845->cur != state )
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{
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mc6845->cur = state;
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if ( mc6845->out_cur_func.target != NULL )
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devcb_call_write_line( &mc6845->out_cur_func, mc6845->cur );
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}
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}
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static void update_upd_adr_timer(mc6845_t *mc6845)
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{
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if (! mc6845->de && supports_transparent[mc6845->device_type])
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timer_adjust_oneshot(mc6845->upd_adr_timer, mc6845->upd_time, 0);
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}
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static TIMER_CALLBACK( upd_adr_timer_cb )
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{
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running_device *device = (running_device *)ptr;
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@ -554,15 +528,12 @@ static TIMER_CALLBACK( upd_adr_timer_cb )
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}
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static TIMER_CALLBACK( de_changed_timer_cb )
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static TIMER_CALLBACK( de_off_timer_cb )
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{
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running_device *device = (running_device *)ptr;
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mc6845_t *mc6845 = get_safe_token(device);
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/* call the callback function -- we know it exists */
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devcb_call_write_line(&mc6845->out_de_func, is_display_enabled(mc6845));
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update_de_changed_timer(mc6845);
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mc6845_set_de( mc6845, FALSE );
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}
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@ -571,8 +542,10 @@ static TIMER_CALLBACK( cur_on_timer_cb )
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running_device *device = (running_device *)ptr;
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mc6845_t *mc6845 = get_safe_token(device);
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/* call the callback function -- we know it exists */
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devcb_call_write_line(&mc6845->out_cur_func, TRUE);
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mc6845_set_cur( mc6845, TRUE );
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/* Schedule CURSOR off signal */
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timer_adjust_oneshot( mc6845->cur_off_timer, ticks_to_attotime( 1, mc6845->clock ), 0 );
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}
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@ -581,32 +554,7 @@ static TIMER_CALLBACK( cur_off_timer_cb )
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running_device *device = (running_device *)ptr;
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mc6845_t *mc6845 = get_safe_token(device);
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/* call the callback function -- we know it exists */
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devcb_call_write_line(&mc6845->out_cur_func, FALSE);
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update_cur_changed_timers(mc6845);
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}
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static TIMER_CALLBACK( vsync_on_timer_cb )
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{
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running_device *device = (running_device *)ptr;
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mc6845_t *mc6845 = get_safe_token(device);
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/* call the callback function -- we know it exists */
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devcb_call_write_line(&mc6845->out_vsync_func, TRUE);
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}
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static TIMER_CALLBACK( vsync_off_timer_cb )
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{
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running_device *device = (running_device *)ptr;
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mc6845_t *mc6845 = get_safe_token(device);
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/* call the callback function -- we know it exists */
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devcb_call_write_line(&mc6845->out_vsync_func, FALSE);
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update_vsync_changed_timers(mc6845);
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mc6845_set_cur( mc6845, FALSE );
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}
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@ -614,9 +562,13 @@ static TIMER_CALLBACK( hsync_on_timer_cb )
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{
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running_device *device = (running_device *)ptr;
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mc6845_t *mc6845 = get_safe_token(device);
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UINT8 hsync_width = ( mc6845->sync_width & 0x0f ) ? ( mc6845->sync_width & 0x0f ) : 0x10;
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/* call the callback function -- we know it exists */
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devcb_call_write_line(&mc6845->out_hsync_func, TRUE);
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mc6845->hsync_width_counter = 0;
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mc6845_set_hsync( mc6845, TRUE );
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/* Schedule HSYNC off signal */
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timer_adjust_oneshot( mc6845->hsync_off_timer, ticks_to_attotime( hsync_width, mc6845->clock ), 0 );
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}
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@ -625,63 +577,133 @@ static TIMER_CALLBACK( hsync_off_timer_cb )
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running_device *device = (running_device *)ptr;
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mc6845_t *mc6845 = get_safe_token(device);
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/* call the callback function -- we know it exists */
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devcb_call_write_line(&mc6845->out_hsync_func, FALSE);
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update_hsync_changed_timers(mc6845);
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mc6845_set_hsync( mc6845, FALSE );
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}
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static TIMER_CALLBACK( line_timer_cb )
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{
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running_device *device = (running_device *)ptr;
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mc6845_t *mc6845 = get_safe_token(device);
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int new_vsync = mc6845->vsync;
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mc6845->character_counter = 0;
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mc6845->cursor_x = -1;
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/* Check if VSYNC is active */
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if ( mc6845->vsync_ff )
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{
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UINT8 vsync_width = supports_vert_sync_width[mc6845->device_type] ? (mc6845->sync_width >> 4) & 0x0f : 0;
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mc6845->vsync_width_counter = ( mc6845->vsync_width_counter + 1 ) & 0x0F;
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/* Check if we've reached end of VSYNC */
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if ( mc6845->vsync_width_counter == vsync_width )
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{
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mc6845->vsync_ff = 0;
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new_vsync = FALSE;
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}
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}
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if ( mc6845->raster_counter == mc6845->max_ras_addr )
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{
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/* Check if we have reached the end of the vertical area */
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if ( mc6845->line_counter == mc6845->vert_char_total )
|
||||
{
|
||||
mc6845->adjust_counter = 0;
|
||||
mc6845->adjust_active = 1;
|
||||
}
|
||||
|
||||
mc6845->raster_counter = 0;
|
||||
mc6845->line_counter = ( mc6845->line_counter + 1 ) & 0x7F;
|
||||
mc6845->line_address = ( mc6845->line_address + mc6845->horiz_disp ) & 0x3fff;
|
||||
|
||||
/* Check if we've reached the end of active display */
|
||||
if ( mc6845->line_counter == mc6845->vert_disp )
|
||||
{
|
||||
mc6845->line_enable_ff = 0;
|
||||
}
|
||||
|
||||
/* Check if VSYNC should be enabled */
|
||||
if ( mc6845->line_counter == mc6845->vert_sync_pos )
|
||||
{
|
||||
mc6845->vsync_width_counter = 0;
|
||||
mc6845->vsync_ff = 1;
|
||||
|
||||
new_vsync = TRUE;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
mc6845->raster_counter = ( mc6845->raster_counter + 1 ) & 0x1F;
|
||||
}
|
||||
|
||||
if ( mc6845->adjust_active )
|
||||
{
|
||||
/* Check if we have reached the end of a full cycle */
|
||||
if ( mc6845->adjust_counter == mc6845->vert_total_adj )
|
||||
{
|
||||
mc6845->adjust_active = 0;
|
||||
mc6845->raster_counter = 0;
|
||||
mc6845->line_counter = 0;
|
||||
mc6845->line_address = mc6845->disp_start_addr;
|
||||
mc6845->line_enable_ff = 1;
|
||||
/* also update the cursor state now */
|
||||
update_cursor_state(mc6845);
|
||||
}
|
||||
else
|
||||
{
|
||||
mc6845->adjust_counter = ( mc6845->adjust_counter + 1 ) & 0x1F;
|
||||
}
|
||||
}
|
||||
|
||||
if ( mc6845->line_enable_ff )
|
||||
{
|
||||
/* Schedule DE off signal change */
|
||||
timer_adjust_oneshot(mc6845->de_off_timer, ticks_to_attotime( mc6845->horiz_disp, mc6845->clock ), 0);
|
||||
|
||||
/* Is cursor visible on this line? */
|
||||
if ( mc6845->cursor_state &&
|
||||
(mc6845->raster_counter >= (mc6845->cursor_start_ras & 0x1f)) &&
|
||||
(mc6845->raster_counter <= mc6845->cursor_end_ras) &&
|
||||
(mc6845->cursor_addr >= mc6845->line_address) &&
|
||||
(mc6845->cursor_addr < (mc6845->line_address + mc6845->horiz_disp)) )
|
||||
{
|
||||
mc6845->cursor_x = mc6845->cursor_addr - mc6845->line_address;
|
||||
|
||||
/* Schedule CURSOR ON signal */
|
||||
timer_adjust_oneshot( mc6845->cur_on_timer, ticks_to_attotime( mc6845->cursor_x, mc6845->clock ), 0 );
|
||||
}
|
||||
}
|
||||
|
||||
/* Schedule HSYNC on signal */
|
||||
timer_adjust_oneshot( mc6845->hsync_on_timer, ticks_to_attotime( mc6845->horiz_sync_pos, mc6845->clock ), 0 );
|
||||
|
||||
/* Schedule our next callback */
|
||||
timer_adjust_oneshot( mc6845->line_timer, ticks_to_attotime( mc6845->horiz_char_total + 1, mc6845->clock ), 0 );
|
||||
|
||||
/* Set VSYNC and DE signals */
|
||||
mc6845_set_vsync( mc6845, new_vsync );
|
||||
mc6845_set_de( mc6845, mc6845->line_enable_ff ? TRUE : FALSE );
|
||||
}
|
||||
|
||||
|
||||
UINT16 mc6845_get_ma(running_device *device)
|
||||
{
|
||||
UINT16 ret;
|
||||
mc6845_t *mc6845 = get_safe_token(device);
|
||||
|
||||
if (mc6845->has_valid_parameters)
|
||||
{
|
||||
/* clamp Y/X to the visible region */
|
||||
int y = mc6845->screen->vpos();
|
||||
int x = mc6845->screen->hpos();
|
||||
|
||||
/* since the MA counter stops in the blanking regions, if we are in a
|
||||
VBLANK, both X and Y are at their max */
|
||||
if ((y > mc6845->max_visible_y) || (x > mc6845->max_visible_x))
|
||||
x = mc6845->max_visible_x;
|
||||
|
||||
if (y > mc6845->max_visible_y)
|
||||
y = mc6845->max_visible_y;
|
||||
|
||||
ret = (mc6845->disp_start_addr +
|
||||
(y / (mc6845->max_ras_addr + 1)) * mc6845->horiz_disp +
|
||||
(x / mc6845->hpixels_per_column)) & 0x3fff;
|
||||
}
|
||||
else
|
||||
ret = 0;
|
||||
|
||||
return ret;
|
||||
mc6845_update_counters( mc6845 );
|
||||
|
||||
return ( mc6845->line_address + mc6845->character_counter ) & 0x3fff;
|
||||
}
|
||||
|
||||
|
||||
UINT8 mc6845_get_ra(running_device *device)
|
||||
{
|
||||
UINT8 ret;
|
||||
mc6845_t *mc6845 = get_safe_token(device);
|
||||
|
||||
if (mc6845->has_valid_parameters)
|
||||
{
|
||||
/* get the current vertical raster position and clamp it to the visible region */
|
||||
int y = mc6845->screen->vpos();
|
||||
|
||||
if (y > mc6845->max_visible_y)
|
||||
y = mc6845->max_visible_y;
|
||||
|
||||
ret = y % (mc6845->max_ras_addr + 1);
|
||||
}
|
||||
else
|
||||
ret = 0;
|
||||
|
||||
return ret;
|
||||
return mc6845->raster_counter;
|
||||
}
|
||||
|
||||
|
||||
@ -697,34 +719,11 @@ static TIMER_CALLBACK( light_pen_latch_timer_cb )
|
||||
|
||||
void mc6845_assert_light_pen_input(running_device *device)
|
||||
{
|
||||
int y, x;
|
||||
int char_x;
|
||||
|
||||
mc6845_t *mc6845 = get_safe_token(device);
|
||||
|
||||
if (mc6845->has_valid_parameters)
|
||||
{
|
||||
/* get the current pixel coordinates */
|
||||
y = mc6845->screen->vpos();
|
||||
x = mc6845->screen->hpos();
|
||||
|
||||
/* compute the pixel coordinate of the NEXT character -- this is when the light pen latches */
|
||||
char_x = x / mc6845->hpixels_per_column;
|
||||
x = (char_x + 1) * mc6845->hpixels_per_column;
|
||||
|
||||
/* adjust if we are passed the boundaries of the screen */
|
||||
if (x == mc6845->horiz_pix_total)
|
||||
{
|
||||
y = y + 1;
|
||||
x = 0;
|
||||
|
||||
if (y == mc6845->vert_pix_total)
|
||||
y = 0;
|
||||
}
|
||||
|
||||
/* set the timer that will latch the display address into the light pen registers */
|
||||
timer_adjust_oneshot(mc6845->light_pen_latch_timer, mc6845->screen->time_until_pos(y, x), 0);
|
||||
}
|
||||
/* compute the pixel coordinate of the NEXT character -- this is when the light pen latches */
|
||||
/* set the timer that will latch the display address into the light pen registers */
|
||||
timer_adjust_oneshot(mc6845->light_pen_latch_timer, ticks_to_attotime( 1, mc6845->clock ), 0);
|
||||
}
|
||||
|
||||
|
||||
@ -812,9 +811,6 @@ void mc6845_update(running_device *device, bitmap_t *bitmap, const rectangle *cl
|
||||
{
|
||||
/* read the start address at the beginning of the frame */
|
||||
mc6845->current_disp_addr = mc6845->disp_start_addr;
|
||||
|
||||
/* also update the cursor state now */
|
||||
update_cursor_state(mc6845);
|
||||
}
|
||||
|
||||
/* for each row in the visible region */
|
||||
@ -877,40 +873,34 @@ static void common_start(running_device *device, int device_type)
|
||||
mc6845->hpixels_per_column = mc6845->intf->hpixels_per_column;
|
||||
|
||||
/* get the screen device */
|
||||
mc6845->screen = downcast<screen_device *>(device->machine->device(mc6845->intf->screen_tag));
|
||||
assert(mc6845->screen != NULL);
|
||||
if ( mc6845->intf->screen_tag != NULL )
|
||||
{
|
||||
mc6845->screen = downcast<screen_device *>(device->machine->device(mc6845->intf->screen_tag));
|
||||
assert(mc6845->screen != NULL);
|
||||
}
|
||||
else
|
||||
mc6845->screen = NULL;
|
||||
|
||||
/* create the timers */
|
||||
if (mc6845->out_de_func.target != NULL || supports_transparent[mc6845->device_type])
|
||||
{
|
||||
mc6845->de_changed_timer = timer_alloc(device->machine, de_changed_timer_cb, (void *)device);
|
||||
if(supports_transparent[mc6845->device_type])
|
||||
{
|
||||
mc6845->upd_adr_timer = timer_alloc(device->machine, upd_adr_timer_cb, (void *)device);
|
||||
}
|
||||
}
|
||||
mc6845->line_timer = timer_alloc(device->machine, line_timer_cb, (void *)device);
|
||||
|
||||
if (mc6845->out_cur_func.target != NULL)
|
||||
{
|
||||
mc6845->cur_on_timer = timer_alloc(device->machine, cur_on_timer_cb, (void *)device);
|
||||
mc6845->cur_off_timer = timer_alloc(device->machine, cur_off_timer_cb, (void *)device);
|
||||
}
|
||||
mc6845->de_off_timer = timer_alloc(device->machine, de_off_timer_cb, (void *)device);
|
||||
mc6845->upd_adr_timer = timer_alloc(device->machine, upd_adr_timer_cb, (void *)device);
|
||||
|
||||
if (mc6845->out_hsync_func.target != NULL)
|
||||
{
|
||||
mc6845->hsync_on_timer = timer_alloc(device->machine, hsync_on_timer_cb, (void *)device);
|
||||
mc6845->hsync_off_timer = timer_alloc(device->machine, hsync_off_timer_cb, (void *)device);
|
||||
}
|
||||
mc6845->cur_on_timer = timer_alloc(device->machine, cur_on_timer_cb, (void *)device);
|
||||
mc6845->cur_off_timer = timer_alloc(device->machine, cur_off_timer_cb, (void *)device);
|
||||
|
||||
if (mc6845->out_vsync_func.target != NULL)
|
||||
{
|
||||
mc6845->vsync_on_timer = timer_alloc(device->machine, vsync_on_timer_cb, (void *)device);
|
||||
mc6845->vsync_off_timer = timer_alloc(device->machine, vsync_off_timer_cb, (void *)device);
|
||||
}
|
||||
mc6845->hsync_on_timer = timer_alloc(device->machine, hsync_on_timer_cb, (void *)device);
|
||||
mc6845->hsync_off_timer = timer_alloc(device->machine, hsync_off_timer_cb, (void *)device);
|
||||
}
|
||||
|
||||
mc6845->light_pen_latch_timer = timer_alloc(device->machine, light_pen_latch_timer_cb, (void *)device);
|
||||
|
||||
/* Use some large startup values */
|
||||
mc6845->horiz_char_total = 0xff;
|
||||
mc6845->max_ras_addr = 0x1f;
|
||||
mc6845->vert_char_total = 0x7f;
|
||||
|
||||
/* register for state saving */
|
||||
state_save_register_postload(device->machine, mc6845_state_save_postload, mc6845);
|
||||
|
||||
@ -937,6 +927,21 @@ static void common_start(running_device *device, int device_type)
|
||||
state_save_register_device_item(device, 0, mc6845->cursor_blink_count);
|
||||
state_save_register_device_item(device, 0, mc6845->update_addr);
|
||||
state_save_register_device_item(device, 0, mc6845->update_ready_bit);
|
||||
state_save_register_device_item(device, 0, mc6845->cur);
|
||||
state_save_register_device_item(device, 0, mc6845->hsync);
|
||||
state_save_register_device_item(device, 0, mc6845->vsync);
|
||||
state_save_register_device_item(device, 0, mc6845->de);
|
||||
state_save_register_device_item(device, 0, mc6845->character_counter);
|
||||
state_save_register_device_item(device, 0, mc6845->hsync_width_counter);
|
||||
state_save_register_device_item(device, 0, mc6845->line_counter);
|
||||
state_save_register_device_item(device, 0, mc6845->raster_counter);
|
||||
state_save_register_device_item(device, 0, mc6845->adjust_counter);
|
||||
state_save_register_device_item(device, 0, mc6845->vsync_width_counter);
|
||||
state_save_register_device_item(device, 0, mc6845->line_enable_ff);
|
||||
state_save_register_device_item(device, 0, mc6845->vsync_ff);
|
||||
state_save_register_device_item(device, 0, mc6845->adjust_active);
|
||||
state_save_register_device_item(device, 0, mc6845->line_address);
|
||||
state_save_register_device_item(device, 0, mc6845->cursor_x);
|
||||
}
|
||||
|
||||
static DEVICE_START( mc6845 )
|
||||
@ -992,6 +997,11 @@ static DEVICE_RESET( mc6845 )
|
||||
devcb_call_write_line(&mc6845->out_vsync_func, FALSE);
|
||||
}
|
||||
|
||||
if ( ! timer_enabled( mc6845->line_timer ) )
|
||||
{
|
||||
timer_adjust_oneshot( mc6845->line_timer, ticks_to_attotime( mc6845->horiz_char_total + 1, mc6845->clock ), 0 );
|
||||
}
|
||||
|
||||
mc6845->light_pen_latched = FALSE;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user