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Those are not tantalum, those are multilayer ceramic 100nF capacitors. Interesting, never had a problem with those.

King's Quest I-III and Quest for Glory II: https://www.agdinteractive.com/games/games.html

Good job. Here's a little tip for fixing switching PSUs (also CRT monitors, amplifiers, etc.): put a light bulb (40W works great) in series with the mains power before powering the device up. This limits the current and prevents components from blowing up if there is a problem. Plus, if the bulb...

Thanks. It's a great forum. I've been reading here for a long time.

I'm in the process of fixing a Compaq Portable Plus. One of the many, many, many problems it has is that the VDU board has a fault which results only in some characters being corrupted. Like this: The first corrupted character has pixels changing randomly while the screen is static, the...

Thanks for the great project, Chuck! It's still very relevant. In case anyone needs to, assembling the code is pretty straightforward on a current linux system. I did this on a Raspberry Pi. I had to do it because I only have a PIC12F675 handy. First, get the current version of gputils: svn...