28 Apr
2024
28 Apr
'24
2:54 a.m.
> How many know that AAM is a two byte instruction,
with the second byte
> being 0Ah?
> Changing the second byte to 8 gave division by 8, etc.
On Sat, 27 Apr 2024, Chuck Guzis via cctalk wrote:
Only for sure on Intel x86 processors. I believe that
the NEC V20
assumes that the second byte is 0x0a and ignores the byte completely. I
would not be surprised to find that other non-Intel CPUs behave the same
way.
Thank you
I had checked it on an NEC V20, but not on MANY other CPUs.
But, there was always the possibility that something like that COULD
occur at any time in the future, so I never used that in any released
product.
--
Grumpy Ol' Fred cisin(a)xenosoft.com