[CCTECH] Interesting tidbit on 6502

From: Ben Franchuk <bfranchuk_at_jetnet.ab.ca>
Date: Fri Jun 7 10:31:13 2002

"J.C. Wren" wrote:
>
> Why don't you learn that you don't always know what you're talking about?
>
> Indeed, the first step level of the 6800 had an undocumented opcode that
> results in 3 particular transistors turning on that connected Vcc to GND.
> The damage caused by these three transistors shorting damaged the silicon in
> the immediate area, rendering the CPU useless.
>
> But since the shop I worked for only flamed out 2 Sphere-II 6800 CPUs
> before the Motorola FAE defined the problem and gave us new parts, it
> probably didn't really happen, since you said it's fiction.

Since this was a early and rare version of the 6800 and most of my
information
is second hand stuff (general computer books vs data sheets )
information
like this is useful trivia. Even modern chips can have hard to find
bugs,
like the pentium division bug.


-- 
Ben Franchuk - Dawn * 12/24 bit cpu *
www.jetnet.ab.ca/users/bfranchuk/index.html
Received on Fri Jun 07 2002 - 10:31:13 BST

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