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Allow that the next interrupt line might be in the next frame.

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Thomas Harte 2023-02-26 14:23:38 -05:00
parent c7128f4206
commit 12bd71cfe1
1 changed files with 2 additions and 1 deletions
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Components/9918/Implementation/9918.cpp
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@ -1253,7 +1253,8 @@ HalfCycles TMS9918<personality>::get_next_sequence_point() const {
// Figure out the number of internal cycles until the next line interrupt, which is the amount
// of time to the next tick over and then next_line_interrupt_row - row_ lines further.
const int local_cycles_until_line_interrupt = cycles_to_next_interrupt_threshold + (next_line_interrupt_row - line_of_next_interrupt_threshold) * Timing<personality>::CyclesPerLine;
const int lines_until_interrupt = (next_line_interrupt_row - line_of_next_interrupt_threshold + this->mode_timing_.total_lines) % this->mode_timing_.total_lines;
const int local_cycles_until_line_interrupt = cycles_to_next_interrupt_threshold + lines_until_interrupt * Timing<personality>::CyclesPerLine;
if(!this->generate_interrupts_) return this->clock_converter_.half_cycles_before_internal_cycles(local_cycles_until_line_interrupt);
// Return whichever interrupt is closer.