[Coco] Color Computer cart addresses / CoCo PSG
zippster278 at gmail.com
Thu Dec 22 15:00:40 EST 2016
I think I have a pretty clear picture now between the Lomont doc and something Jim
sent me that appears to possibly be based on it (but different).
*SCS is active for $FF40-$FF5F if I understand correctly (R&W). I think if I place
the 5 addresses I need at the upper end of this I should be ok staying out of the way
(and have the help of *SCS in doing so).
I had it at the lower end of the *SCS region, but it looked like the SDC modifies a reg
on it’s initial search for other disk controllers (just a guess, I don’t know the procedure used).
Not a big deal as it can easily be corrected in software once running, but if I can stay
completely clear I’d rather.
So I’m thinking $FF5B-$FF5F in conjunction with *SCS will be ok for decoding register
access. Easy to change if an issue crops up at least. :)
> On Dec 22, 2016, at 1:31 PM, Bill Pierce via Coco <coco at maltedmedia.com> wrote:
> Ed, the Lomont doc floated around between a few members at one time with everyone adding ports to it, but I have no clue where the final doc ended up at.
> Bill Pierce
> "Charlie stole the handle, and the train it won't stop going, no way to slow down!" - Ian Anderson - Jethro Tull
> My Music from the Tandy/Radio Shack Color Computer 2 & 3
> Co-Contributor, Co-Editor for CocoPedia
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> -----Original Message-----
> From: Zippster <zippster278 at gmail.com>
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> Sent: Thu, Dec 22, 2016 12:58 pm
> Subject: [Coco] Color Computer cart addresses / CoCo PSG
> Hello guys,I thought I saw referenced at some time or another a doc of some sort with most of theaddresses used by various CoCo cart hardware. I’m trying to put together on a spreadsheetall the known addresses.So far I have what’s covered in Chris Lomont’s very useful programming reference…<http://www.lomont.org/Software/Misc/CoCo/Lomont_CoCoHardware.pdf>Are there others that anyone knows of?I’m in the process of selecting addresses for the CoCo YM2149 cart, and don’t want to conflictwith anything. I have the CPLD programming pretty much developed, and everything seems to be working.I should be able to show it playing some register dumps very soon. :)Pics of assembled boards… <https://drive.google.com/open?id=0B1sgl615FlGnM0Jna3ByeVVfaHM>Project page…<https://sites.google.com/site/thezippsterzone/coco-psg <https://sites.google.com/site/thezippsterzone/coco-psg>>- Ed-- Coco mailing listCoco at maltedmedia.comhttps://pairlist5.pair.net/mailman/listinfo/coco
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