23 May
2010
23 May
'10
2:59 a.m.
On Sun, 2010-05-23 at 04:40 -0500, Jason T wrote:
Alright - same question applies then: is converting
SECAM->NTSC
necessary to run one of these machines in the US (assuming I don't
find a companion monitor for it?)
I would imagine that it would have the same timings as other European
Apple II clones, that is an NTSC signal padded to fit the slower PAL
timing requirements (or at least that's what I've found with my //c).
This would mean it'd be in B&W, unless they also made some sort of
converter for it. I'm thinking along the lines of the //c PAL adaptor.
SECAM has the same timing as B&W PAL (625 lines interlaced, 15625Hz line
freuqnecy, 50Hz field rate) but the colour is encoded with FM instead of
QAM and the U and V signals are sent on alternate lines. I doubt they
would have gone to the effort of making an Apple II compatible with this
scheme, because it really is *awful*.
My guess to get it working on an NTSC television would be to adjust your
horizontal and vertical sync pots, though it will still be in B&W.
Cheers,
Alexis.