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Corrects TMS' get_time_until_interrupt when the next interrupt is exactly a frame away.

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Thomas Harte 2017-12-14 21:12:51 -05:00
parent 3da323c657
commit ad50b6b1fb
1 changed files with 1 additions and 1 deletions
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Components/9918/9918.cpp
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@ -654,7 +654,7 @@ uint8_t TMS9918::get_register(int address) {
const int half_cycles_per_frame = frame_lines_ * 228 * 2;
int half_cycles_remaining = (192 * 228 * 2 + half_cycles_per_frame - half_cycles_into_frame_.as_int()) % half_cycles_per_frame;
return HalfCycles(half_cycles_remaining);
return HalfCycles(half_cycles_remaining ? half_cycles_remaining : half_cycles_per_frame);
}
bool TMS9918::get_interrupt_line() {