Re: C65 on Ebay

On 11/05/2017 12:45 PM, Mia Magnusson wrote:
> Den Sat, 4 Nov 2017 16:29:36 +0000 skrev smf <smf@null.net>:
>> On 04/11/2017 16:13, silverdr@wfmh.org.pl wrote:
>>> You mean the composite one coming out of the Amigas? Can't confirm
>>> either. Never used those for anything. I recall A1k2 used an
>>> off-the-shelf encoder chip (by Sony if I remember correctly) but
>>> can't say anything about how well it did the job in terms of
>>> standard compliance.
>>
>> I mean composite video at all. Composite video inputs on TV's came
>> much later than NTSC and PAL (which was around the 1950's). Sure we
>> all talk about composite as being NTSC or PAL, but then we talked
>> about amiga's RGB output being NTSC or PAL as well.
> 
> I can assure you that composite video signals (baseband) were around in
> TV studios since day one of TV broadcasts.
>   
>>> Probably yes, but I was more about external (to VIC chip) encoding
>>> from YUV/RGB rather than putting both PAL and NTSC in. In such case
>>> I hardly see a chance of having any cost advantage by putting more
>>> stuff inside a chip rather than removing as much as possible..
>>
>> VIC had composite encoding on chip to save money, many computers at
>> the time had video chips which output rgb and then had external
>> circuits to convert to composite. Having a single VIC2 for PAL/NTSC
>> would mean they didn't have to keep two sets of inventory.
> 
> It was not only to save money but also to actually give a better
> picture quality. We might bash the C64 and VIC-20 how much we want for
> poor composite color video quality, but compared to many other
> computers from the same days the picture was actually rather good.

Especially sind VIC didn't produce Composite but S-Video (Y/C) instead. 
Done right, that produces a very good picture as you can see when you 
replace the modulator in a C64 with a circuit that just amplifies the 
video signals.

Also, VIC needed different versions for PAL and NTSC, yes, but they 
fixed that with TED, the 7360/8360 can be switched between NTSC and PAL. 
Of course, then you need different KERNAL ROMs...

  Gerrit


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