Bun's Lab – Telegram
Bun's Lab
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Electronics projects, vintæg computing, programming and repairs. A minimalist blog of sorts.
@BunsGarden @BunsNook
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Seems like the soundcard was a later upgrade.
VARTA keeping it classy.
Cleaned up nicely.
First power on and wiggling a bit at the memory Simms. No beep. Guess it's a project. I don't have the time for it right now though, so I'll put it back together and put it on the ever growing pile for now. All I wanted to do is neutralize the battery leak before it causes even more damage and assess the situation.
Bun's Lab
First power on and wiggling a bit at the memory Simms. No beep. Guess it's a project. I don't have the time for it right now though, so I'll put it back together and put it on the ever growing pile for now. All I wanted to do is neutralize the battery leak…
So, the post codes can mean wildly different things depending not only the BIOS maker but also version. Older AMI BIOSes up to 1991 point to a memory issue. Newer ones up to 1993 to something completely different. This 74F00 hex inverter is of course highly suspicious, as are two or three traces coming from the chipset.

Source: http://mrbios.com/techsupport/award/postcodes.htm
Uhh I don't think that's up to spec
I'm in love
This NAND is definitely bad. Three gates don't do what they should. Their inputs are low, but so are their outputs. Only one gate was working. Problem is, the holes are so tight that it was impossible to get it out without cutting it off.
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This trace is also bad
Some older pictures of some of my vintage computers:
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