9 Attachment(s)
The story of the mega A2000 job lot
Hello ppl,
Here is the story of a project I've been working on for the last 5 months, currently nearing completion :)
In January of this year I was fortunate enough to acquire a lot of A2000 stuff from Amiga-Digital in NL.
This is what it looked like after arrival:
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10 cases, 12 motherboards, some zorro boards, some genlock & misc boards, MFM hdd's and a few power supplies.
After testing some worked, but most of them were having severe problems due to corrosion / varta death and or not working at all, black screen etc.
And it gets worse: lacking almost all screws! no case screws, motherboards held with only one screw.. Also not nearly enough working PSUs and keyboards.. a bunch of missing busters & other stuff. A serious project this is ;)
Now, after almost 5 months of debugging / repairing / soldering every weekend, I've managed to fully restore and clean every motherboard. Curious what 13 A2k mobos in a row looks like?
Attachment 87372
From left to right: 2 donor boards (one rev4 one model a), 5 rev6.x boards, 4 incomplete rev4.x ones (buster missing), 2 complete rev4.xs.
The most broken of them all was this rev6.2 mofo:
Attachment 87375
- All 8 drams dead
- 5 dead 74xx244/254 buffers
- A dead 74LS148
That took two weekends of logic probing and soldering, but it's 100% working ok now :thumbsup:
One never knows, but I'd think this one suffered a catastrophic PSU faillure... At least something overloaded the +5v rail...
Another nice one:
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This babe required a new cpu and agnus socket (the latter was shattered to pieces)...
To be continued...
