[Coco] Bringing ext. ROM back into active memory map?

[Arthur Flexser]

POKE &HFFDE,0 should do it.  You'll lose access to the 40/80 character screen, and everything else that involves Super Extended Basic, so the CoCo 3 will act like a CoCo 1 or 2 in most respects.

Art
________________________________
From: Coco <coco-bounces at maltedmedia.com> on behalf of Bruce Borer via Coco <coco at maltedmedia.com>
Sent: Sunday, March 24, 2024 2:33 PM
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Cc: Bruce Borer <brucep.borer at gmail.com>
Subject: [Coco] Bringing ext. ROM back into active memory map?

Note: This message originated from outside the FIU Faculty/Staff email system.


Hi All,
    I am new to programming the CoCo (after 40 years).
    My question for today is: On a CoCo3 which copies everything to
RAM how do I bring back the actual ROM back into the active memory
map?
Just "POKE &Hff90,&H0C" does not work.
    I have a board with the ROM replaced with Flash and it is able to
be programmed in circuit if CTS is made active again.  I prefer not to
make a separate board just to program the Flash then insert the
programmed Flash into my cartridge.
    If I get this working I plan to release my design to the community.

Bruce P. Borer

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