Well, I'm trying this again to see if the video will post. (I replied a couple days ago but I'm not seeing it.)
Here's a video of what happens, and it's condensed down to show all three phases.
Phase 1 - Totally scrambled, scrolling wildly and unreadable. (up to 10 minutes)
Phase 2 -...
Hey guys,
I'm trying to sleuth out why my 4P has very messy 80-column video (64 is fine) and of course I found plenty of information about C231 here on the site. So, I carefully disassembled and extracted the motherboard, disconnected the floppy and expected to tweak C231 on the motherboard...
Well, my hopes were high as I opened the Ebay box today on my "as-is" Model 4P. I had a Model I, then a Model III, and I had always wanted to get a 4P but the parents never went for it. Outside of some yellowing of the case, it was in good cosmetic shape and had the 64k upgrade. Finally...