[Coco] CoCo 3 POKEs to go to "CoCo 1/2" mode?
Allen Huffman
alsplace at pobox.com
Sun Jan 29 19:38:36 EST 2023
> On Jan 29, 2023, at 6:12 PM, Arthur Flexser via Coco <coco at maltedmedia.com> wrote:
>
> Sure, just do the poke to go to the ROM mode: POKE &HFFDE,0.
>
> This doesn't quite restore the ROMs to the CoCo 1/2 mode. You still won't have a DLOAD command. But close.
I had been under the impression that the original two 8K ROMs for Color BASIC and Extended BASIC where untouched, and the additional ROM code just applied patches/overlays to them.
After a POKE &HFFDE,0 and then a POKE 113,0:EXEC 40999, it does reset back to the old Extended Color BASIC 1.1 screen (confirming there was no 1.2 used in the CoCo 3), but DLOAD causes a reset/crash which indicates it’s still pointed to reset code.
Time to check Unravelled...
--
Allen Huffman - PO Box 7634 - Urbandale IA 50323 - 515-999-0227 (vmail/TXT only)
http://www.subethasoftware.com - https://www.facebook.com/subethasoftware
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