25 Mar
2002
25 Mar
'02
3:35 a.m.
> > I guess I'm having a "senior
moment" but I don't remember the 4118 at
> all,
> Excuse the typo, this should read "4116."
No it shouldn't, at least not if it concerns the
ZX81 logic board.
TS 1500 will do the trick :)
4118. 1K*8 static RAM, 24 pin DIL package. Used in the
ZX81.
4116 16K*1 dynamic RAM. 16 pin DIL package. Used in
the ZX81 16K RAMpack
and in just about every other micro of the time...
The ZX81 logic board was designed to hold 1K of static
RAM. Either as a
single 4118 or a pair of 2114s (1K*4 static RAM, 18 pin DIL package).
Or a 6116. AFAIR, the TS1000 has been sold with 2 K as
standard configuration.
There were pads to solder either type of chip onto the
board. I guess
Sinclair used whichever was cheaper at the time.
Sounds good.
Gruss
H.
--
VCF Europa 3.0 am 27./28. April 2002 in Muenchen
http://www.vcfe.org/