[Coco] CoCoSDC and Extended ADOS3

Darren A mechacoco at gmail.com
Mon Nov 28 23:06:51 EST 2016

On Mon, Nov 28, 2016 at 8:00 PM, Arthur Flexser wrote:

> Darren, just wanted to give you some information about how Extended
> ADOS-3 works, so you can judge if there's any fundamental
> incompatibility that would rule out Ron's goal of getting Ext. ADOS-3
> working with the CoCoSDC.
> Extended ADOS-3 can only run from a 16K ROM;  there's no way to test
> it running from RAM.  That's because it uses the space above $E000
> both in RAM and in ROM mode, switching between Super Extended Basic in
> RAM and Ext. ADOS-3's upper ROM bank as needed.  Will that scheme work
> with the CoCoSDC?
> Art

Yes Art, each bank of the flash memory in the CoCo SDC acts like a 16K ROM
at $C000.  The SDC-DOS provided with the CoCo SDC also contains code above
$E000 and does the same switching between All RAM and RAM/ROM modes on a
CoCo 3.

- Darren

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