30 Dec
2009
30 Dec
'09
2:31 p.m.
Fred Cisin wrote:
Yep 80186, dunno about the 188, I alas don't have one to test it on...
I wasn't actually supprised by the behavior...just wondered if anyone
had noticed it before :)
Cheers.
Phill.
--
Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !
"You can twist perceptions, but reality won't budge" -- Rush.
If I load a
value into AX, and then do an out instruction with AL, the
whole of AX seems to still appear on the data bus, something like:
MOV AX,055AAh
OUT 022,AL
It looks like to me that the whole of AX is actually getting put out,
No big deal.
I assume that was the 80186.
How was the timing of the 80188? (did it also try to do anything with
AH?)