22 Mar
2002
22 Mar
'02
7:21 p.m.
On Mar 22, 22:43, Richard Erlacher wrote:
I guess I'm having a "senior moment" but
I don't remember the 4118 at
all,
though I definitely remember that there was such a
thing. Mostek made a
couple of pseudo-static RAM parts that were on a ~2716-compatible pinout.
Was
that one of them? I've got some 1K- and 2K- byte
parts from those days
but I
don't remember the numbers right offhand.
Perhaps someone could refresh my recollection.
4118 is the same pinout as a 2716 except that pin 21 is the /WR line
instead of Vpp, and pin 19 is NC instead of A10. It's a genuine static
part, 1K x 8. A 6116 is similar, but 2K x 8, with A10 on pin 19. There
are also low-power CMOS versions of the 6116. Zilog made a "quasi-static
RAM" 4K x 8, called Z8132, but it's 28-pin. They also, confusingly, made
16-pin dynamic RAMs 8K x 1 and 16K x 1 called Z6115 and Z6116, similar to
the more common 4116 DRAM.
--
Pete Peter Turnbull
Network Manager
University of York