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Merge pull request #909 from TomHarte/BackToFive

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Tweaks video timing, again.
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Thomas Harte 2021-04-06 21:16:50 -04:00 committed by GitHub
commit 8a6985c2e8
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1 changed files with 2 additions and 2 deletions
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Machines/Sinclair/ZXSpectrum/Video.hpp
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@ -88,10 +88,10 @@ template <VideoTiming timing> class Video {
.cycles_per_line = 228 * 2,
.lines_per_frame = 311,
// i.e. video fetching begins six cycles after the start of the
// i.e. video fetching begins five cycles after the start of the
// contended memory pattern below; that should put a clear two
// cycles between a Z80 access and the first video fetch.
.contention_leadin = 6 * 2,
.contention_leadin = 5 * 2,
.contention_duration = 129 * 2,
// i.e. interrupt is first signalled 14368 cycles before the first video fetch.