TT motherboard rev. identification: Any tips?

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stephen_usher
Posts: 95
Joined: Mon Nov 13, 2017 7:19 pm

TT motherboard rev. identification: Any tips?

Post by stephen_usher » Sun Jun 24, 2018 12:28 pm

I've been trying to identify the revision version of my TT motherboard.

Other than the standard "CA400770-" marking there's nothing other than the serial number "T0002299".

I know that it's not the earliest "16MHz-upgraded to 32MHz" version and it's not a Rev.D or above as it has socketed chips throughout.

I can't see any post-build modifications/fixes.

I'm guessing that it's a Rev.C.

Is there a definitive recognition guide to the Rev. level available?

Atarian Computing
Posts: 178
Joined: Tue Aug 22, 2017 4:27 am

Re: TT motherboard rev. identification: Any tips?

Post by Atarian Computing » Sun Jun 24, 2018 12:54 pm

I'm working on a guide to identify revisions. Does it have a daughterboard (look at gold topped CPU)? For example:

Image

Then it's REV.A.

If it looks like this:

Image

It's a REV.C

stephen_usher
Posts: 95
Joined: Mon Nov 13, 2017 7:19 pm

Re: TT motherboard rev. identification: Any tips?

Post by stephen_usher » Sun Jun 24, 2018 12:57 pm

It's a Rev. C from that description.

Atarian Computing
Posts: 178
Joined: Tue Aug 22, 2017 4:27 am

Re: TT motherboard rev. identification: Any tips?

Post by Atarian Computing » Sun Jun 24, 2018 1:02 pm

stephen_usher wrote:
Sun Jun 24, 2018 12:28 pm
Is there a definitive recognition guide to the Rev. level available?
The guide is challenging to make as there are seemingly conflicting information from all sides. For example, one single revision of a TT motherboard has the following markings:

CA401146-001 REV.H
CA400770
C302506 REV A

So not easy, especially when there is little research material to work with.

Atarian Computing
Posts: 178
Joined: Tue Aug 22, 2017 4:27 am

Re: TT motherboard rev. identification: Any tips?

Post by Atarian Computing » Sun Jun 24, 2018 1:04 pm

stephen_usher wrote:
Sun Jun 24, 2018 12:57 pm
It's a Rev. C from that description.
Also known as C301763-001 Rev.B1 and referred by Atari as B.1 in schematics.

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