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https://github.com/TomHarte/CLK.git
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Shift the h-within-v pulse to eliminate a curved top line.
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@ -82,8 +82,9 @@ template <class BusHandler> class Video: public VideoBase {
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A frame is oriented around 65 cycles across, 262 lines down.
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*/
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const int first_sync_line = 220; // A complete guess. Information needed.
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const int first_sync_column = 49; // Also a guess.
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static const int first_sync_line = 220; // A complete guess. Information needed.
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static const int first_sync_column = 49; // Also a guess.
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static const int sync_length = 4; // One of the two likely candidates.
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int int_cycles = cycles.as_int();
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while(int_cycles) {
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@ -93,8 +94,8 @@ template <class BusHandler> class Video: public VideoBase {
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if(row_ >= first_sync_line && row_ < first_sync_line + 3) {
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// In effect apply an XOR to HSYNC and VSYNC flags in order to include equalising
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// pulses (and hencce keep hsync approximately where it should be during vsync).
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const int blank_start = std::max(first_sync_column, column_);
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const int blank_end = std::min(first_sync_column + 4, ending_column);
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const int blank_start = std::max(first_sync_column - sync_length, column_);
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const int blank_end = std::min(first_sync_column, ending_column);
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if(blank_end > blank_start) {
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if(blank_start > column_) {
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crt_->output_sync(static_cast<unsigned int>(blank_start - column_) * 14);
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@ -235,15 +236,15 @@ template <class BusHandler> class Video: public VideoBase {
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}
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const int sync_start = std::max(first_sync_column, column_);
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const int sync_end = std::min(first_sync_column + 4, ending_column);
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const int sync_end = std::min(first_sync_column + sync_length, ending_column);
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if(sync_end > sync_start) {
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crt_->output_sync(static_cast<unsigned int>(sync_end - sync_start) * 14);
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}
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int second_blank_start;
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if(line_mode != GraphicsMode::Text && (!mixed_mode_ || row_ < 159 || row_ >= 192)) {
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const int colour_burst_start = std::max(first_sync_column + 4, column_);
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const int colour_burst_end = std::min(first_sync_column + 7, ending_column);
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const int colour_burst_start = std::max(first_sync_column + sync_length + 1, column_);
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const int colour_burst_end = std::min(first_sync_column + sync_length + 4, ending_column);
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if(colour_burst_end > colour_burst_start) {
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crt_->output_default_colour_burst(static_cast<unsigned int>(colour_burst_end - colour_burst_start) * 14);
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}
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@ -321,7 +322,7 @@ template <class BusHandler> class Video: public VideoBase {
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static_cast<uint16_t>(((video_page_+1) * 0x400) + row_address);
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}
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const int flash_length = 8406;
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static const int flash_length = 8406;
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BusHandler &bus_handler_;
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void output_data_to_column(int column) {
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int length = column - pixel_pointer_column_;
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