[Coco] Disto SC (NOT) needed
operator at coco3.com
Sat Nov 15 02:06:20 EST 2008
At 12:40 AM 11/15/2008, you wrote:
>Do you hear the heads move before the crash? Does it seem to crash at
>a point where it would actually be reading a sector (seek to the
>correct track completes successfully)? This usually indicates a
>problem with the HALT or NMI, but those problems are normally isolated
>to an individual CoCo (CPU). You say this happens with several CoCos
>which has me a liitle perplexed. You can try this BASIC one-liner to
>test the controller's HALT circuit:
>POKE &HFF48,3:POKE &HFF40,128
You're a genious. I don't think I've ever seen a solution from you
that wasn't 99.9% or 100% "good".
I typed those POKEs and the problem was reproduced. I tried another
64k ECB CoCo 2 and now my "controller" works. So, I suppose both of
my CoCo 1's have the NMI line screwed up. Is there a fix for THAT ? :)
I guess I could have wiggled the controller on accident while the power was on.
Many thanks on the tip!
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