[Coco] CoCo3 and 16K cart roms.....

[Bill Pierce]

Phil, isn't that where Super Extended Basic is at?
The Coco 3 transfers it's Roms to ram to patch in SECB after boot, so your rom is being over written by SECB. That's the same problem with extending HDBDOS to 16k, it won't work on Coco 3 without doing some bank switching to keep SECB working.

 

 


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
https://sites.google.com/site/dabarnstudio/
Co-Contributor, Co-Editor for CocoPedia
http://www.cocopedia.com/wiki/index.php/Main_Page
Global Moderator for TRS-80/Tandy Color Computer Forums
http://www.tandycoco.com/forum/

E-Mail: ooogalapasooo at aol.com


 

 

-----Original Message-----
From: Phill Harvey-Smith <afra at ramoth.org.uk>
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Sent: Mon, Apr 11, 2016 8:20 am
Subject: [Coco] CoCo3 and 16K cart roms.....

Hi all,I'm trying to develop a ROM for the Dragon & CoCo that will act as a disk controller type rom that is started by having DK in bytes C000 / C001 and entry at C002.This seems to work without problems on the CoCo 1/2 & Dragon machines, but falls over on the CoCo3, as it fairly early on jumps to the upper half of the ROM which then causes it to die as the correct code doesn't seem to be there.Is there anything I need to be doing to ensure that my code is mapped into the E000-FEFF block?Cheers.Phill.-- Coco mailing listCoco at maltedmedia.comhttps://pairlist5.pair.net/mailman/listinfo/coco