Denial

Make sure you are optimizing the right thing! I’d start with the multiplication, then rotation, and after that consider any multiprocessing. And don't forget the drawing code - which often is the most time consuming part :) Doing stuff on the drive on the other hand almost never gives a significant...

Cool, thanks, will have a look

Are the schematics available?

I would probably either get a physical MINIMON cart or choose a monitor cartridge image that VICE currently supports. That leads to the question whether such dedicated "minimon" cartridge actually exists - or was it written to be used with one of the multipurpose cartridges (or an interna...

CE is not a "certificate" and doesn't cost more than the sticker.

"UP9600" is a c64 specific hack, it uses the serial shift registers of the CIA

everything else should work fine with the VIC20 though

It's much easier to interface with SD cards than with USB (A bit of bitbanging SPI vs an entire USB stack).

I prefer regular SD cards any day for that matter. micro SD is just too fiddly to use. And too easy to misplace and never to be found ever again

In situations like this, the finger/body acts like a capacitor kindof.

In any case, when color goes off like this, the color carrier frequency is slightly wrong - you'll have to adjust it with one of the pots. Better have measurement equipment for this

You can just call INPUT and discard the result

It should be compatible (with all CBM machines that have a userport, if it uses the standard pins)

I think he moved on by now

No - the parallel drive cable goes from the Userport (Typically 8 port bits plus one or two handshake lines) to one of the VIAs in the drive

Context: i am currently looking through the userport stuff in VICE, fixing things as i stumble about it, and removing stuff that shouldn't exist (because it can not work). As for VIC20 i noticed that parallel cable is kindof half implemented in the UI (but not in the emulator), so i am wondering if ...

... does it exist? Or well rather, is there any VIC20 software supporting it? (i guess a speeddos-like cable could be used with VIC20)

The build system seems really weird, it uses LUA???