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Slightly relaxed vertical sync testing.

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This commit is contained in:
Thomas Harte 2017-07-30 21:19:42 -04:00
parent ba4f2d8917
commit 55fd9122d0
1 changed files with 4 additions and 1 deletions
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Outputs/CRT/CRT.cpp
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@ -36,7 +36,10 @@ void CRT::set_new_timing(unsigned int cycles_per_line, unsigned int height_of_di
cycles_per_line_ = cycles_per_line;
unsigned int multiplied_cycles_per_line = cycles_per_line * time_multiplier_;
sync_capacitor_charge_threshold_ = (vertical_sync_half_lines * cycles_per_line) >> 1;
// allow sync to be detected (and acted upon) a line earlier than the specified requirement,
// as a simple way of avoiding not-quite-exact comparison issues while still being true enough to
// the gist for simple debugging
sync_capacitor_charge_threshold_ = ((vertical_sync_half_lines - 2) * cycles_per_line) >> 1;
// create the two flywheels
horizontal_flywheel_.reset(new Flywheel(multiplied_cycles_per_line, (millisecondsHorizontalRetraceTime * multiplied_cycles_per_line) >> 6, multiplied_cycles_per_line >> 6));