Denial

I was wondering if it would be possible to put a SID chip on a cartridge and use it with a Vic 20. Has anyone ever pondered this idea?

Hi,

maybe it will work. The Atari User do this with the Atari 8-Bit's.

Nice question.

Cheers

According to the Battleships docs, there used to be SID chips interfaced with the VIC-20. I've never heard about it before, but the game supports a 6581 chip mapped at $9140 (i.e. right after the VIAs).

Mobsie, Could you give me a web site for the info on atari, so I can study this a little more. Also, Anders, I'd like to get a web site I could get that Battleship info from.

That would be the next thing I'd put on a wish list.

1. 40k RAM Expander.
2. Sid Expander
3. 40/80 column Card


Maybe someone can get some sprite control too.Hey, I just made a motley64. LOL. Oh well, I can dream (because I probably don't have the know how to make something like that myself).


Thanks for the help.

Hi Rob,

on the http://www.abbuc.de site you find a lot of stuff. I am member and i became an printed magazine 4-5 times in year.

In this magazine i found the articel about the SID stuff. I remember there was an link. I will lot at home ( in moment i am on work) an then i post the link here.

Cheers
Mobsie

Rob, check http://www.cbm.sfks.se/files/ but I haven't looked into the actual program to see if it really tries to address a SID at the mentioned address. There are no technical docs how to build a cartridge anyway.

The Plus/4 quite commonly interfaced an external SID chip at $fd00 IIRC. I don't know which "latency" you get with a chip on the cartridge port, but at least you should be able to play the simple music that doesn't alter the register values one hundred times per second.

Thanks guys for the info.