Help with identifying mobo

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wrecksan
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Help with identifying mobo

Post by wrecksan »

Hi all, apologies for my ignorance but I was wondering if it is possible to identify via these 2 (awkward) pictures, if I have the type of motherboard that can be upgraded to 4mb ram or not.

I know the pics are horrible, but I'm a bit reluctant to pull the entire thing apart without knowing much about it.

Thanks for your help!

QXpVdhP.jpeg
QXpVdhP.jpeg (267.23 KiB) Viewed 1225 times
Xrc4V1j.jpeg
Xrc4V1j.jpeg (268.6 KiB) Viewed 1225 times
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exxos
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Re: Help with identifying mobo

Post by exxos »

Really need to see the whole board.. There are a LOT of revisions, some similar, some very different.

That actually looks to be 2 totally different motherboards ? CPU under the drive, then CPU not under the drive...
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rubber_jonnie
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Re: Help with identifying mobo

Post by rubber_jonnie »

It seems to be one of these: https://www.exxosforum.co.uk/forum/viewtopic.php?t=749

You can see C103175 printed on the board in this picture:

Xrc4V1j.jpeg
Xrc4V1j.jpeg (268.6 KiB) Viewed 1224 times

What you can't tell is the revision, but since you have it part disassembled, removing the top RF shield is quite trivial to do, it's just a few screws and some twist tabs, so you may as well go just a little bit further to see what you have.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
wrecksan
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Re: Help with identifying mobo

Post by wrecksan »

exxos wrote: Tue Jul 31, 2018 11:47 am That actually looks to be 2 totally different motherboards ? CPU under the drive, then CPU not under the drive...
I promise it is the same board, I just tilted the camera left and down a bit.
rubber_jonnie wrote: Tue Jul 31, 2018 11:55 am It seems to be one of these: https://www.exxosforum.co.uk/forum/viewtopic.php?t=749

You can see C103175 printed on the board in this picture:

What you can't tell is the revision, but since you have it part disassembled, removing the top RF shield is quite trivial to do, it's just a few screws and some twist tabs, so you may as well go just a little bit further to see what you have.
That's handy to know, I've actually reassembled this since, I had the board off a while ago when I took the pictures and put it back as the I wasn't allowed to leave an Atari in the middle of the living room :roll:

I'll have another look in a few days, as I'm busy/preparing for holiday at the moment.

Thanks so much for the responses and also 10/10 name rubber_jonnie :lol:
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rubber_jonnie
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Re: Help with identifying mobo

Post by rubber_jonnie »

wrecksan wrote: Tue Jul 31, 2018 2:45 pm
That's handy to know, I've actually reassembled this since, I had the board off a while ago when I took the pictures and put it back as the I wasn't allowed to leave an Atari in the middle of the living room :roll:
What, you don't have a room in your house that's dedicated to Ataris?

:dizzy:
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
wrecksan
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Re: Help with identifying mobo

Post by wrecksan »

rubber_jonnie wrote: Tue Jul 31, 2018 2:51 pm What, you don't have a room in your house that's dedicated to Ataris?
Yet. I don't have a room dedicated to Ataris yet. :lol:
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Re: Help with identifying mobo

Post by rubber_jonnie »

wrecksan wrote: Wed Aug 15, 2018 10:29 am Yet. I don't have a room dedicated to Ataris yet. :lol:
:lolbig: You'd better get on that ;)
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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