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Copied in quote. So that I can stop looking it up.

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Thomas Harte 2015-08-18 22:36:32 -04:00
parent a62c7f5c56
commit f74d9ee373
1 changed files with 6 additions and 0 deletions
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Outputs/CRT.cpp
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@ -24,6 +24,12 @@ void CRT::set_new_timing(unsigned int cycles_per_line, unsigned int height_of_di
const unsigned int millisecondsHorizontalRetraceTime = 10; // source: Dictionary of Video and Television Technology, p. 234 const unsigned int millisecondsHorizontalRetraceTime = 10; // source: Dictionary of Video and Television Technology, p. 234
const unsigned int scanlinesVerticalRetraceTime = 7; // source: ibid const unsigned int scanlinesVerticalRetraceTime = 7; // source: ibid
// To quote:
//
// "retrace interval; The interval of time for the return of the blanked scanning beam of
// a TV picture tube or camera tube to the starting point of a line or field. It is about 7 µs
// for horizontal retrace and 500 to 750 µs for vertical retrace in NTSC and PAL TV."
_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