[CCTECH] Interesting tidbit on 6502

From: Ben Franchuk <bfranchuk_at_jetnet.ab.ca>
Date: Fri Jun 7 01:04:10 2002

Loboyko Steve wrote:
>
> I'm building a 6800 machine right now and I was
> wondering about this "Halt and Catch on Fire"
> instruction. Is this for real. This is a serious
> question. Is there actually an instruction that will
> overheat the chip?

Not on the 6800 but I believe some FORTH chips have that problem.
This instruction for the 6800 if remember right just continually
increments the address bus, ignoring any data read. Only a hard
RESET will reset the machine from this state. I think the opcode
is $00.
Received on Fri Jun 07 2002 - 01:04:10 BST