[Coco] CoCoNet is CoCo 3 ready

Art Flexser flexser at fiu.edu
Mon Dec 22 19:08:54 EST 2008


A bit of trivia I recall about that...

Tony originally set up the circuitry for that controller to support 8 ROM slots
rather than four.  A consequence of this is that if you poke in a value in the
4-7 range, you select a nonexistent slot and get into a situation that cannot be
recovered from even by pressing reset, or, if I'm recalling correctly, even by
doing a ctrl-alt-reset on a CoCo 3.  The only recourse is to toggle the power
off and on (so, watch out for typos when doing that poke).

Art

On Mon, 22 Dec 2008, Roger Taylor wrote:

> At 01:59 AM 12/22/2008, you wrote:
> >I hardly remember that using corresponding POKE (65345?), you could 
> >instruct the MPI, from which slot to select the ROM, overriding the 
> >MPI-switch setting. However, I don't remember what happened on a 
> >"button" reset.
> 
> I'm talking about the Disto Super Controller's ROM selector.  My 
> controller has 4 sockets for EPROMs.  It now appears that just a 
> simple POKE 65345,x and hitting RESET will switch in the CoCoNet ROM 
> without having to warm start.  It took me a while to figure out what 
> was going on.
> 
> -- 
> Roger Taylor
> 
> http://www.wordofthedayonline.com
> 
> 
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