Atari TT motherboard revisions: differences?

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Re: Atari TT motherboard revisions: differences?

Postby Guest » Sun Feb 22, 2015 9:53 pm

the problem is sockets

it was a development machine really

had socket for ics AT VHF??? no 16mhz maybe a bit better but at 32 mhz no
there is too much capacitance and inter chip pins cross talk

the pcb making software wasnt so good at rf stuff nor was digital guys with analogue guys
you need people who make pcbs to have both... mixed mode ,,,, understanding
and a good grounding in both digital and analogue

mostly the older machines were built to be upgradable

in my opinion if someone was too offer me a 32mhz rev c socketed i would do a direct swap for my rev j...

just because it has all the sockets thru hole
and some mods its exactly the same {some coax added}

i use a DDS clock for my ataris {all of them from the same source}
32.000,000.00+-
so is acurate to .01hz
Last edited by Guest on Mon Feb 23, 2015 12:12 pm, edited 1 time in total.

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qq1975b
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Re: Atari TT motherboard revisions: differences?

Postby qq1975b » Mon Feb 23, 2015 9:52 am

Ok, so it was a cost related...Rev A-C was more expensive to make than later revisions. They designed a cost reduced motherboard in later revisions.
Trying to learn...


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