mrdoornbos – Michael Doornbos

I do buy legit copies of JiffyDOS from Jim B and even buy the official switcher when I need them. Sure I can burn my own with pirated copies, but a legit license is $8 whole dollars. Cmon man. #commodore

In case you’re one of THOSE people who was just sitting there thinking “what ARE the startup values in the VIC chip registers on a VIC-20?” Well, you’re in luck. #commodore

Gonna have to build some sort of test bench jig if I’m going to have 32 leads connected to the VIC chip at once without it being a wire hot mess. Good news it the DreamSourceLab 32 channel analyzer arrived and took about 60 seconds to set up. #commodore

Well this is good, turns out I do know how to create a B&W PAL (and NTSC) Composite/S-Video signal from scratch. My timings aren’t quite right, but it’s close. Good first crack though. #commodore #VIC20hacking #learnallthethings

Package delivered from

@svenpetersen191 today. Happens to be the very last VIC-20 A/V adapter he had. Works great as you might expect from Sven. #commodore

Actually read the manual for my scope yesterday. Turns out it’s crazy easy to trigger on a PAL horizontal scan line number. On 110 here you can clearly see the blinking cursor. Turns out RTFM is a good idea after all. #commodore

Yes, even the KIM-1 (clone) can count to a couple quintillion with ease ;-) #commodore

I read this cover to cover sitting by the river yesterday. Can’t recommend it enough.

Current situation

I think I’ve decided on a working codename. Logic analyzer ordered and shipped. I’m shooting for a working version in a year.