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Corrects TMS' get_time_until_interrupt
when the next interrupt is exactly a frame away.
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@ -654,7 +654,7 @@ uint8_t TMS9918::get_register(int address) {
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const int half_cycles_per_frame = frame_lines_ * 228 * 2;
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int half_cycles_remaining = (192 * 228 * 2 + half_cycles_per_frame - half_cycles_into_frame_.as_int()) % half_cycles_per_frame;
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return HalfCycles(half_cycles_remaining);
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return HalfCycles(half_cycles_remaining ? half_cycles_remaining : half_cycles_per_frame);
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}
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bool TMS9918::get_interrupt_line() {
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