SID Chip Upgrade
Moderator: Moderators
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- Vic 20 Drifter
- Posts: 35
- Joined: Fri Dec 17, 2004 8:14 pm
SID Chip Upgrade
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?
Rob Murphy
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- Vic 20 Drifter
- Posts: 35
- Joined: Fri Dec 17, 2004 8:14 pm
Sid Expander
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.
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.
Rob Murphy
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
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.
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.
Anders Carlsson
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- Vic 20 Drifter
- Posts: 35
- Joined: Fri Dec 17, 2004 8:14 pm