31 Dec
2008
31 Dec
'08
11:47 a.m.
Dave McGuire wrote:
Even the original Intel 8051/8751, circa 1980, has
security bits. :-(
There are ways to get around (at least) those, though.
Only on the early mask revs. On the later chips, /EA is latched on reset,
which means the "/EA toggle hack" doesn't work any more. Anything post-1990
is
unlikely to be vulnerable, IIRC.
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/