CBM 8032 display CRT replacement

There are a couple of simple (1-chip) circuits to do that and I've built one of them. I could get legible text on a "standard" B&W security monitor, but I never did get the horizontal hold to be stable. It was good enough to prove the machine was running (I did see the usual ROM splash message in the corner), but it wasn't possible to use the machine in that state. Perhaps you might have better luck, but that was my experience with an external composite monitor adapter circuit a year ago. -------------------------------------------------------------------------------- I'm too busy to download the schematic and take a look right now, but I'm pretty sure the horizontal hold was due to the need of an external inversor in the horizontal sync pulse.