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| From: Crown (all posts)
Date: 2000-01-18
Subject: RE: SID with Plus4
|
> There's an (or only) SID card for Plus/4 is the memory location
> $FF40, if I know well. But there's a hack with this area!
> Try to implement the pseudo SID card into memory $D400
> (like on a real C64)! There're not so much stuffs what support
> the real SID card, but many games (and others) use some
> C64 music conversion routine (if I'm right?), and in many
> programs there're the original C64 music replay routine,
> and it's writing into $D400, so if you turn off the TED sound
> during this, you'll hear the real SID music!
>
> I don't know the real reason of it, I implement it accidentally
> in cp4. But it works for me.
Clue, laziness... :))))
> I need some information about the up/down scroll, especially in
> raster interrupt. And some info about writing to $FF1E-F,
> $FF1A-D!
Clue, grab the letters from the archive first, and read it through,
there were a lot of talk about these regs and some more....
Sending a 'help' command to majordomo@c64.rulez.org is a starting point to get to the archive letters, but Lion will correct me,
if it's not....
Tibor Biczo
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