Denial

Well I guess the OP can weigh in on whether it satisfies his requirements. I'd say saving and loading is a large slice of the use-case cake, even if a small part of the kernel API. I have a Kung-Fu flash and even that doesn't work with many programs on the c64 as they invariably use custom loaders. ...

Is that a deal breaker?

Seems the device fulfils the requirements of the OP and much more e.g. HDMI support. Even supports your VFLI mode.

Take a look at SideKick64

https://github.com/frntc/Sidekick64 (works with the Vic-20 using an adapter).

Here's a good video overview.

https://www.youtube.com/watch?v=cMzPCOoNsoU

Downside it requires a Rasberry Pi but I think it works with a Pi Zero 2 which is only about £15.

If you have access to a scope it would be worth comparing the read/write lines during the diagnostic test.

If it's working, can't be much wrong with it. Check continuity right through to your diag board.

At the risk of being patronising, are you certain you have the connector on the right way around? It isn't keyed and can go on both ways, I've written top on mine

Does the cassette actually load and save a game?

@beamrider: There's some idea I cannot get rid of. As those few sprites seemed to spark some interest, perhaps many would be grateful for a web editor to bring on a complete set of sprites and charsets. But to be honest: the VIC Screen Designer's user interface is far too complicated for anyone to ...

I like the ideas in the BBC version which sounds reasonable. Also the number of monsters could be reduced, such as the platforms, if needed.. Yes, that is what you should be aiming for although the beeb runs at twice the speed of the Vic. If you went for Multicolor mode that helps as your objects m...

Hi, i think the Commodore VIC20: Software Sprite Stack library is the best address for this. https://www.youtube.com/watch?v=UgynBsgwSyI Yes, I think that would be a good fit, Popeye and Pooyan also both used that (Popeye in heavily modified form to allow 3x2 character sprites). Also, TRSE maybe an...

Chat GPT says it's possible :D Creating a version of Bubble Bobble for the VIC-20 is an exciting project! The VIC-20 is a classic home computer that runs on the 6502 microprocessor. Developing a game like Bubble Bobble on this platform involves several key aspects: understanding the limitations of t...

That looks really impressive. I briefly played this on the Amiga and never imagined we'd have a Vic conversion. Congratulations on your achievement.

Out of interest and as something I've never really used. What's the benefits of using a monitor rather than just going straight to an assembler and using the VICE monitor.

I would suggest separating the problem into two parts..

1) Learning 6502
2) Learning to program the VIc hardware in 6502.

I would use the many web based resources (google 6502 assembler online) for part 1 then you will find part 2 much easier.

Attached with Makefile in the ZIP: 32k-loader.zip Assuming that all works since you've attached a make file. In Popeye I had an additional step of copying the bootstrap/relocate code to the cassette buffer as the first step and running everything from there otherwise it overwrote itself when reloca...