David Boyes wrote:
On Sun, Oct 30, 2005 at 10:20:20PM +0800, John Summerfied wrote:
message "Bus error".
"bus error" is a signal inheritted from someone's minicomputer (DEC
maybe?).
More common on 68000-based machines, but stemming from certain
instructions needing their operands to be word-aligned. If the operand
wasn't properly aligned, it caused a bus fetch error.
so CS, CDS, and odd address* in the PSW and a few other instructions
could do it legitimately. Not that that precludes executing junk.
LA R15,1
BASR R14,R15
--
Cheers
John
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