[Coco] 6309 microprocessor project: 11-01-2003

[Neil Morrison]

As I understand, they had a latching address chip that let them bank
switch the rom. I assume that some part(s) were common to all
sections. I believe you poked an address to make the switch. I know
there were programs that could dump the cart to a file and run it on
a 512K Coco.

NM

----- Original Message ----- 
From: "John Collyer" <johncollyer at zoominternet.net>


> 6309 microprocessor project.
>
> Hello,
>
> Working on the memory stuff and it's
> a log hard slog., I need information to
> speed things up.
>
> Could someone explain how the newer coco3
> rom cartridges worked.  The ones that accessed
> more then 32K ROM?  Where the ones that did
> use more then 32K using the same memory map
> and switching methods?  How did these rom
> cartridges switch memory in&out?  What was
> the most ROM, a cartridge ever used?
>
> Also I'd like to learn more about the Multi-Pak
> and how it switched between rom cartridges?