VOGONS

FIC 486-GVT-2 missing PAL

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First post, by Deksor

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Hi !

I recently bought this FIC 486-GVT-2 as "dead". I think I figured out the problem and it seems to be a missing PAL chip ...

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Is there any way to fix that ? I know these need to be programmed in order to work ... Looking online there seem to be two revisions of the GVT-2 : one with that PAL chip and another without it. Unfortunately I got the model that's supposed to have it 🙁

Edit : tikoellner had one in 2017 :

tikoellner wrote on 2017-03-01, 07:23:
Hello, […]
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Hello,

I have just acquired the motherboard as in the title. I noticed that there is a GAL chip missing that was socketed. Just to the right from the 30 pin SIMM sockets.

As I noticed that there are many VOGONS users owning this particular board, I wanted to ask if there is any posibility to get dump of this GAL chip image.

I could burn the image to some empty Lattice chip (still available) and try tu resurrect the board. I believe without it I'm stuck.

Big thanks for any help with that.

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Do you still own this board ? If so can you try to dump it please 😁

Trying to identify old hardware ? Visit The retro web - Project's thread The Retro Web project - a stason.org/TH99 alternative

Reply 1 of 9, by majestyk

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In case tkoellner refuses to dump his board, I have one here but I have no idea at the moment how to dump the data from this DIL20 chip.

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Reply 2 of 9, by Deksor

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Do you have a TL866 ? They can dump these chips (if they haven't been copy protected)

If they're copy protected it can be retro engineered with a logic analyser and by checking how the circuit works (in that case I could try to do the retro engineering with the given data)

Trying to identify old hardware ? Visit The retro web - Project's thread The Retro Web project - a stason.org/TH99 alternative

Reply 3 of 9, by majestyk

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I just ordered one. Will take about 2 weeks to get here. If noone does it in the meantime, I will post the dumpfile here as soon as I have the TL866.

Reply 5 of 9, by majestyk

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Promise.....kept.

Here´s the file, I hope you can use it.

The attachment GAL16V8B.BIN.7z is no longer available

Reply 8 of 9, by majestyk

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These FIC boards are tricky to set up. One jumper / array wrong and they don´t show a sign of life.
I can post a photo of a working configuration.

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