On 2011-08-24 22:10, Marko Mäkelä wrote: > On Wed, Aug 24, 2011 at 09:30:24PM +0200, Hársfalvi Levente wrote: >>> A peculiar thing about the 6567R56A is that the video timings are >>> different. It is 64 cycles per line, while the 6567R8 is 65 cycles per >>> line. Maybe even the number of lines differed. All 6569 revisions >>> that I know of are 63 cycles per line and 312 lines per frame. >> >> I seem to remember that they also provided about half the number of >> luminance levels than later ones (6567R8 / 6569R3) did (which really >> affected picture quality IMHO). > > As far as I remember, the 6569R1 and 6569R3 generate 5 luminance > levels. I do not remember the 6567R8 that well, but I guess it should > generate 5 levels too. According to your own findings, that's not the case... :-) I slightly felt there was something wrong with this thing and indeed it was... remember this nice measurement arranged by you from something like 15 years ago?... :-) http://zimmers.net/anonftp/pub/cbm/documents/chipdata/656x-luminances.txt Levente Message was sent through the cbm-hackers mailing listReceived on 2011-08-25 16:00:03
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