14 Oct
2007
14 Oct
'07
10:45 a.m.
On Saturday 13 October 2007 20:32, Ethan Dicks wrote:
On 10/13/07, Roy J. Tellason <rtellason at
verizon.net> wrote:
Weird power supplies and logic levels come to mind. Negative with respect to
ground...
I think they used some of that stuff in organs, back when.
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, ?a critter that can
be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
On Saturday 13 October 2007 15:40, dwight elvey
wrote:
Oh, heck, I'd forgotten about PMOS stuff altogether! :-)
Hmm... PMOS... I know that there are fundamental composition and
voltage differences between NMOS, PMOS, CMOS, HMOS, etc... What makes
it not-compatible with TTL (unlike CMOS, which is easy to interface to
TTL)? >
4008/9? First I've heard of these at all.
These were but interface chips that took the pmos levels and
convertered then to TTL levels to use with standard RAM, ROM, EPROM and
I/O.