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Revert "video/mc6845.cpp: Restore support for zero active width/height config…" (#12169)
This reverts commit cb5624978a
.
This is a case of attempting to fix the symptom rather than the issue, and it breaks all systems that use 6845-family CRTCs with "show borders" set.
This commit is contained in:
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cb5624978a
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1af40e3a1c
@ -407,9 +407,6 @@ int mc6845_device::vsync_r()
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void mc6845_device::recompute_parameters(bool postload)
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{
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bool zero_horizontal_width = (m_horiz_disp == 0);
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bool zero_vertical_height = (m_vert_disp == 0);
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uint16_t hsync_on_pos, hsync_off_pos, vsync_on_pos, vsync_off_pos;
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uint16_t video_char_height = m_max_ras_addr + (MODE_INTERLACE_AND_VIDEO ? m_interlace_adjust : m_noninterlace_adjust); // fix garbage at the bottom of the screen (eg victor9k)
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@ -421,22 +418,8 @@ void mc6845_device::recompute_parameters(bool postload)
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uint16_t vert_pix_total = (m_vert_char_total + 1) * video_char_height + m_vert_total_adj;
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/* determine the visible area, avoid division by 0 */
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uint16_t visible_width = zero_horizontal_width ? m_visible_width : (m_horiz_disp * m_hpixels_per_column);
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uint16_t visible_height = zero_vertical_height ? m_visible_height : (m_vert_disp * video_char_height);
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// Check to see visual width or height needs to be adjusted due to changes with total
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if (zero_horizontal_width || zero_vertical_height)
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{
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if (visible_width > horiz_pix_total)
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{
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visible_width = horiz_pix_total;
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}
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if (visible_height > vert_pix_total)
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{
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visible_height = vert_pix_total;
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}
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}
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uint16_t max_visible_x = m_horiz_disp * m_hpixels_per_column - 1;
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uint16_t max_visible_y = m_vert_disp * video_char_height - 1;
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/* determine the syncing positions */
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uint8_t horiz_sync_char_width = m_sync_width & 0x0f;
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@ -470,13 +453,13 @@ void mc6845_device::recompute_parameters(bool postload)
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/* update only if screen parameters changed, unless we are coming here after loading the saved state */
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if (postload ||
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(horiz_pix_total != m_horiz_pix_total) || (vert_pix_total != m_vert_pix_total) ||
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(visible_width != m_visible_width) || (visible_height != m_visible_height) ||
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(max_visible_x != m_max_visible_x) || (max_visible_y != m_max_visible_y) ||
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(hsync_on_pos != m_hsync_on_pos) || (vsync_on_pos != m_vsync_on_pos) ||
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(hsync_off_pos != m_hsync_off_pos) || (vsync_off_pos != m_vsync_off_pos))
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{
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/* update the screen if we have valid data */
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if ((horiz_pix_total > 0) && (visible_width <= horiz_pix_total) &&
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(vert_pix_total > 0) && (visible_height <= vert_pix_total) &&
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if ((horiz_pix_total > 0) && (max_visible_x < horiz_pix_total) &&
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(vert_pix_total > 0) && (max_visible_y < vert_pix_total) &&
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(hsync_on_pos <= horiz_pix_total) && (vsync_on_pos <= vert_pix_total) &&
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(hsync_on_pos != hsync_off_pos))
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{
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@ -491,33 +474,23 @@ void mc6845_device::recompute_parameters(bool postload)
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// Also, the mode-register change needs to be added to the changed-parameter tests above.
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if (MODE_INTERLACE_AND_VIDEO)
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{
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//visible_height *= 2;
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//max_visible_y *= 2;
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//vert_pix_total *= 2;
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}
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if(m_show_border_area)
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{
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visarea.set(0, horiz_pix_total-2, 0, vert_pix_total-2);
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}
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else
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{
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visarea.set(
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0 + m_visarea_adjust_min_x, visible_width - 1 + m_visarea_adjust_max_x,
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0 + m_visarea_adjust_min_y, visible_height - 1 + m_visarea_adjust_max_y);
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}
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visarea.set(0 + m_visarea_adjust_min_x, max_visible_x + m_visarea_adjust_max_x, 0 + m_visarea_adjust_min_y, max_visible_y + m_visarea_adjust_max_y);
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LOGCONF("M6845 config screen: HTOTAL: %d VTOTAL: %d VIS_WIDTH: %d VIS_HEIGHT: %d HSYNC: %d-%d VSYNC: %d-%d Freq: %ffps\n",
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horiz_pix_total, vert_pix_total, visible_width, visible_height, hsync_on_pos, hsync_off_pos - 1, vsync_on_pos, vsync_off_pos - 1, refresh.as_hz());
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LOGCONF("M6845 config screen: HTOTAL: %d VTOTAL: %d MAX_X: %d MAX_Y: %d HSYNC: %d-%d VSYNC: %d-%d 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, refresh.as_hz());
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if (has_screen())
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{
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screen().configure(horiz_pix_total, vert_pix_total, visarea, refresh.as_attoseconds());
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}
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if(!m_reconfigure_cb.isnull())
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{
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m_reconfigure_cb(horiz_pix_total, vert_pix_total, visarea, refresh.as_attoseconds());
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}
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m_has_valid_parameters = true;
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}
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@ -526,8 +499,8 @@ void mc6845_device::recompute_parameters(bool postload)
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m_horiz_pix_total = horiz_pix_total;
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m_vert_pix_total = vert_pix_total;
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m_visible_width = visible_width;
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m_visible_height = visible_height;
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m_max_visible_x = max_visible_x;
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m_max_visible_y = max_visible_y;
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m_hsync_on_pos = hsync_on_pos;
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m_hsync_off_pos = hsync_off_pos;
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m_vsync_on_pos = vsync_on_pos;
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@ -703,7 +676,6 @@ bool hd6845s_device::check_cursor_visible(uint16_t ra, uint16_t line_addr)
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TIMER_CALLBACK_MEMBER(mc6845_device::handle_line_timer)
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{
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bool new_vsync = m_vsync;
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bool nonzero_horizontal_width = (m_horiz_disp != 0);
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m_character_counter = 0;
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m_cursor_x = -1;
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@ -781,11 +753,8 @@ TIMER_CALLBACK_MEMBER(mc6845_device::handle_line_timer)
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if ( m_line_enable_ff )
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{
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if (nonzero_horizontal_width)
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{
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/* Schedule DE off signal change */
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m_de_off_timer->adjust(cclks_to_attotime(m_horiz_disp));
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}
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/* Schedule DE off signal change */
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m_de_off_timer->adjust(cclks_to_attotime(m_horiz_disp));
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/* Is cursor visible on this line? */
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if (check_cursor_visible(m_raster_counter, m_line_address))
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@ -805,7 +774,7 @@ TIMER_CALLBACK_MEMBER(mc6845_device::handle_line_timer)
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/* Set VSYNC and DE signals */
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set_vsync( new_vsync );
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set_de( (m_line_enable_ff && nonzero_horizontal_width) ? true : false );
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set_de( m_line_enable_ff ? true : false );
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}
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@ -950,7 +919,6 @@ uint8_t mc6845_device::draw_scanline(int y, bitmap_rgb32 &bitmap, const rectangl
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{
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/* compute the current raster line */
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uint8_t ra = y % (m_max_ras_addr + (MODE_INTERLACE_AND_VIDEO ? m_interlace_adjust : m_noninterlace_adjust));
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bool nonzero_horizontal_width = (m_horiz_disp != 0);
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// Check if the cursor is visible and is on this scanline.
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int cursor_visible = check_cursor_visible(ra, m_current_disp_addr);
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@ -959,7 +927,7 @@ uint8_t mc6845_device::draw_scanline(int y, bitmap_rgb32 &bitmap, const rectangl
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// is in units of characters and is relative to the start of the
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// displayable area, not relative to the screen bitmap origin.
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int8_t cursor_x = cursor_visible ? (m_cursor_addr - m_current_disp_addr) : -1;
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int de = ((y < m_visible_height) && nonzero_horizontal_width) ? 1 : 0;
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int de = (y <= m_max_visible_y) ? 1 : 0;
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int vbp = m_vert_pix_total - m_vsync_off_pos;
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if (vbp < 0) vbp = 0;
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int hbp = m_horiz_pix_total - m_hsync_off_pos;
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@ -1073,11 +1041,10 @@ void mc6845_device::device_start()
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m_upd_adr_timer = timer_alloc(FUNC(mc6845_device::adr_update_tick), this);
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m_upd_trans_timer = timer_alloc(FUNC(mc6845_device::transparent_update_tick), this);
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// Make sure m_horiz_char_total/m_vert_char_total are less than m_horiz_disp/m_vert_disp
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// to avoid calculating startup resolution before values are valid
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m_horiz_char_total = 0;
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/* Use some large startup values */
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m_horiz_char_total = 0xff;
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m_max_ras_addr = 0x1f;
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m_vert_char_total = 0;
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m_vert_char_total = 0x7f;
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m_mode_control = 0x00;
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m_supports_disp_start_addr_r = false; // MC6845 can not read Display Start (double checked on datasheet)
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@ -1097,13 +1064,13 @@ void mc6845_device::device_start()
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m_de = 0;
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m_sync_width = 1;
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m_horiz_pix_total = m_vert_pix_total = 0;
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m_visible_width = m_visible_height = 0;
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m_max_visible_x = m_max_visible_y = 0;
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m_hsync_on_pos = m_vsync_on_pos = 0;
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m_hsync_off_pos = m_vsync_off_pos = 0;
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m_vsync = m_hsync = 0;
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m_cur = 0;
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m_line_counter = 0;
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m_horiz_disp = m_vert_disp = 0x7f;
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m_horiz_disp = m_vert_disp = 0;
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m_vert_sync_pos = 0;
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m_vert_total_adj = 0;
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m_cursor_start_ras = m_cursor_end_ras = m_cursor_addr = 0;
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@ -204,8 +204,8 @@ protected:
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/* These computed are used to define the screen parameters for a driver */
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uint16_t m_horiz_pix_total;
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uint16_t m_vert_pix_total;
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uint16_t m_visible_width;
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uint16_t m_visible_height;
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uint16_t m_max_visible_x;
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uint16_t m_max_visible_y;
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uint16_t m_hsync_on_pos;
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uint16_t m_hsync_off_pos;
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uint16_t m_vsync_on_pos;
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@ -1422,9 +1422,6 @@ INPUT_PORTS_END
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MC6845_UPDATE_ROW( cbm2_state::crtc_update_row )
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{
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if (!de)
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return;
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pen_t const *const pen = m_palette->pens();
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int x = 0;
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@ -19,6 +19,8 @@
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- 49/50 row mode only shows half the screen.
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- In 49/50 row mode, character descenders are cut off.
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- Screen saver does not disable the screen
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- With superset slot option
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- Screensaver freezes the screen instead of blanking the screen
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Not Implemented (yet)
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- With SigmaSoft IGC
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@ -908,7 +910,6 @@ ROM_START( h19 )
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ROM_LOAD( "2716_444-37_h19keyb.u445", 0x0000, 0x0800, CRC(5c3e6972) SHA1(df49ce64ae48652346a91648c58178a34fb37d3c))
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ROM_END
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ROM_START( super19 )
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// Super-19 ROM
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ROM_REGION( 0x1000, "maincpu", ROMREGION_ERASEFF )
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@ -923,7 +924,6 @@ ROM_START( super19 )
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ROM_LOAD( "2716_444-37_h19keyb.u445", 0x0000, 0x0800, CRC(5c3e6972) SHA1(df49ce64ae48652346a91648c58178a34fb37d3c))
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ROM_END
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ROM_START( superset )
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// SuperSet ROM
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ROM_REGION( 0x4000, "maincpu", ROMREGION_ERASEFF )
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@ -942,7 +942,6 @@ ROM_START( superset )
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ROM_LOAD( "2716_101-422_superset_kbd.u445", 0x0000, 0x0800, CRC(549d15b3) SHA1(981962e5e05bbdc5a66b0e86870853ce5596e877))
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ROM_END
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ROM_START( watz19 )
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ROM_REGION( 0x1000, "maincpu", ROMREGION_ERASEFF )
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ROM_DEFAULT_BIOS("watzman-a")
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@ -963,7 +962,6 @@ ROM_START( watz19 )
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ROM_LOAD( "keybd.u445", 0x0000, 0x0800, CRC(58dc8217) SHA1(1b23705290bdf9fc6342065c6a528c04bff67b13))
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ROM_END
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ROM_START( ultra19 )
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// Ultra ROM
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ROM_REGION( 0x1000, "maincpu", ROMREGION_ERASEFF )
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@ -978,7 +976,6 @@ ROM_START( ultra19 )
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ROM_LOAD( "2716_h19_ultra_keyboard.u445", 0x0000, 0x0800, CRC(76130c92) SHA1(ca39c602af48505139d2750a084b5f8f0e662ff7))
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ROM_END
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ROM_START( gp19 )
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// GP-19 ROMs
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ROM_REGION( 0x3000, "maincpu", ROMREGION_ERASEFF )
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@ -995,7 +992,6 @@ ROM_START( gp19 )
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ROM_LOAD( "2716_444-37_h19keyb.u445", 0x0000, 0x0800, CRC(5c3e6972) SHA1(df49ce64ae48652346a91648c58178a34fb37d3c))
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ROM_END
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ROM_START( imaginator )
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// Program code
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ROM_REGION( 0x4000, "maincpu", ROMREGION_ERASEFF )
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@ -1137,7 +1133,6 @@ ioport_constructor heath_super19_tlb_device::device_input_ports() const
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return INPUT_PORTS_NAME(super19);
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}
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/**
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* Superset ROM
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*
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@ -1285,7 +1280,6 @@ void heath_superset_tlb_device::out2_internal(int data)
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m_selected_char_set = (m_selected_char_set & 0x0a) | (data & 0x01);
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}
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/**
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* Watzman ROM
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*
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@ -1306,7 +1300,6 @@ ioport_constructor heath_watz_tlb_device::device_input_ports() const
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return INPUT_PORTS_NAME(watz19);
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}
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/**
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* UltraROM
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*
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@ -1345,7 +1338,6 @@ ioport_constructor heath_ultra_tlb_device::device_input_ports() const
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return INPUT_PORTS_NAME(ultra19);
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}
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/**
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* Northwest Digital Systems GP-19 add-in board
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*/
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@ -1442,6 +1434,7 @@ void heath_gp19_tlb_device::latch_u5_w(uint8_t data)
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}
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}
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MC6845_UPDATE_ROW(heath_gp19_tlb_device::crtc_update_row)
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{
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rgb_t const *const palette = m_palette->palette()->entry_list_raw();
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