[Coco] 384 or 450 scanlines ?

[Mathieu Bouchard]

Le 2014-01-10 à 10:37:00, Nick Marentes a écrit :

> Ciaran Anscomb <cocomalt at ...> writes:
>> I see it as only doing progressive - half resolution, double rate (50Hz or
>> 60Hz) progressive.  The machines never actually *emit* that blank field you
>> describe, the lines for it are just never scanned.
>
> It would be good to know for sure. I thought that a CoCo compatible RGB, 
> composite or TV is an interlace video device only. 15Khz interlaced at 
> 50/60 hertz. If the CoCo is not generating the blank field and it's 
> progressive, surely the frequency would be higher? (and it's not)

I think that two of us are saying that an interlaced signal of 
half-fields, and a progressive signal with incredibly long vblanks, are 
just two ways of saying the same thing.

  ______________________________________________________________________
| Mathieu BOUCHARD ----- téléphone : +1.514.383.3801 ----- Montréal, QC