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Attempts further to ensure proper CRT signalling.

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This commit is contained in:
Thomas Harte 2018-11-26 22:36:22 -05:00
parent d45c2a1f28
commit a6383247fc
1 changed files with 11 additions and 7 deletions
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18
Machines/Electron/Video.cpp
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@ -84,7 +84,9 @@ void VideoOutput::start_pixel_line() {
void VideoOutput::end_pixel_line() { void VideoOutput::end_pixel_line() {
const int data_length = int(current_output_target_ - initial_output_target_); const int data_length = int(current_output_target_ - initial_output_target_);
crt_.output_data(data_length * current_output_divider_, size_t(data_length)); if(data_length) {
crt_.output_data(data_length * current_output_divider_, size_t(data_length));
}
current_character_row_++; current_character_row_++;
} }
@ -103,7 +105,9 @@ void VideoOutput::output_pixels(int number_of_cycles) {
if(!initial_output_target_ || divider != current_output_divider_) { if(!initial_output_target_ || divider != current_output_divider_) {
const int data_length = int(current_output_target_ - initial_output_target_); const int data_length = int(current_output_target_ - initial_output_target_);
crt_.output_data(data_length * current_output_divider_, size_t(data_length)); if(data_length) {
crt_.output_data(data_length * current_output_divider_, size_t(data_length));
}
current_output_divider_ = divider; current_output_divider_ = divider;
initial_output_target_ = current_output_target_ = crt_.begin_data(size_t(640 / current_output_divider_), size_t(8 / divider)); initial_output_target_ = current_output_target_ = crt_.begin_data(size_t(640 / current_output_divider_), size_t(8 / divider));
} }
@ -124,7 +128,7 @@ void VideoOutput::output_pixels(int number_of_cycles) {
current_output_target_ += 8; current_output_target_ += 8;
current_pixel_column_++; current_pixel_column_++;
} }
} else current_output_target_ += 4*number_of_cycles; } else current_output_target_ += 8*number_of_cycles;
break; break;
case 1: case 1:
@ -135,7 +139,7 @@ void VideoOutput::output_pixels(int number_of_cycles) {
current_output_target_ += 4; current_output_target_ += 4;
current_pixel_column_++; current_pixel_column_++;
} }
} else current_output_target_ += 2*number_of_cycles; } else current_output_target_ += 4*number_of_cycles;
break; break;
case 2: case 2:
@ -146,7 +150,7 @@ void VideoOutput::output_pixels(int number_of_cycles) {
current_output_target_ += 2; current_output_target_ += 2;
current_pixel_column_++; current_pixel_column_++;
} }
} else current_output_target_ += number_of_cycles; } else current_output_target_ += 2*number_of_cycles;
break; break;
case 4: case 6: case 4: case 6:
@ -177,7 +181,7 @@ void VideoOutput::output_pixels(int number_of_cycles) {
current_output_target_ += 4; current_output_target_ += 4;
current_pixel_column_++; current_pixel_column_++;
} }
} else current_output_target_ += 2 * number_of_cycles; } else current_output_target_ += 4 * number_of_cycles;
break; break;
case 5: case 5:
@ -208,7 +212,7 @@ void VideoOutput::output_pixels(int number_of_cycles) {
current_output_target_ += 2; current_output_target_ += 2;
current_pixel_column_++; current_pixel_column_++;
} }
} else current_output_target_ += number_of_cycles; } else current_output_target_ += 2*number_of_cycles;
break; break;
} }