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

[Bruce Borer]

Hi Arthur,
    That seems to work.
    Note: "Extended Basic - Unraveled" indicates that writing to
&HFFDE disables ROM and writing to &HFFDF enables ROM.
Now I have to debug the code that enables writes to the Flash.
Bruce

On Sun, Mar 24, 2024 at 3:17 PM Arthur Flexser via Coco
<coco at maltedmedia.com> wrote:
>
> 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
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco