[Coco] reading the ROM on a CoCo 3

Robert Gault robert.gault at worldnet.att.net
Fri Jul 28 06:59:52 EDT 2006


Mike Pepe wrote:

> Oh, duh!
> 
> Forgot about the old SAM ROM/RAM switch.
> 
> Interestingly enough, when I do that, the program immediately crashes.
> 
> I'm loading the short code in $0E00, the machine has 512k. First thing 
> it does is disable the interrupts.
> 
> Soon as I sta $ffde, the machine locks up and the screen fills with crap.
> 
> maybe I need to move the code to a different location.
> 
> 
 ><snip>

That should not happen. You probably are overlooking something in your 
code. $E00 is a safe location when switching RAM/ROM.

If you want to send your source code to me, I'll see if I can find the bug.



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