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Maybe the 10 lines resource I saw meant 10 lines including charge time?

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Thomas Harte 2015-07-31 19:00:40 -04:00
parent 5f1d76e855
commit de4f2bf5dd
1 changed files with 2 additions and 2 deletions
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4
Outputs/CRT.cpp
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@ -22,7 +22,7 @@ void CRT::set_new_timing(int cycles_per_line, int height_of_display)
{ {
const int syncCapacityLineChargeThreshold = 3; const int syncCapacityLineChargeThreshold = 3;
const int millisecondsHorizontalRetraceTime = 7; // source: Dictionary of Video and Television Technology, p. 234 const int millisecondsHorizontalRetraceTime = 7; // source: Dictionary of Video and Television Technology, p. 234
const int scanlinesVerticalRetraceTime = 10; // source: ibid const int scanlinesVerticalRetraceTime = 7; // source: ibid
_time_multiplier = (1000 + cycles_per_line - 1) / cycles_per_line; _time_multiplier = (1000 + cycles_per_line - 1) / cycles_per_line;
height_of_display += (height_of_display / 20); // this is the overrun area we'll use to height_of_display += (height_of_display / 20); // this is the overrun area we'll use to
@ -124,7 +124,7 @@ CRT::SyncEvent CRT::get_next_vertical_sync_event(bool vsync_is_charging, int cyc
if (_sync_capacitor_charge_level < _sync_capacitor_charge_threshold && _sync_capacitor_charge_level + proposedSyncTime >= _sync_capacitor_charge_threshold) { if (_sync_capacitor_charge_level < _sync_capacitor_charge_threshold && _sync_capacitor_charge_level + proposedSyncTime >= _sync_capacitor_charge_threshold) {
uint32_t proposed_sync_y = _rasterPosition.y + (_sync_capacitor_charge_threshold - _sync_capacitor_charge_level) * _scanSpeed.y; uint32_t proposed_sync_y = _rasterPosition.y + (_sync_capacitor_charge_threshold - _sync_capacitor_charge_level) * _scanSpeed.y;
if(proposed_sync_y >= (kCRTFixedPointRange * 15) >> 4) { if(proposed_sync_y >= (kCRTFixedPointRange * 7) >> 3) {
proposedSyncTime = _sync_capacitor_charge_threshold - _sync_capacitor_charge_level; proposedSyncTime = _sync_capacitor_charge_threshold - _sync_capacitor_charge_level;
proposedEvent = SyncEvent::StartVSync; proposedEvent = SyncEvent::StartVSync;
_did_detect_vsync = true; _did_detect_vsync = true;