--- On Thu, 4/30/09, Ethan Dicks <ethan.dicks at gmail.com> wrote:
Is this hack as simple as
eliminating the -5V
and +12V to the socket, or is there more to it? I have
tubes and
tubes of NOS 4164s, and could easily build a 1-2-socket
stacker with
missing pins to plug a 4164 into a 4116 socket if
that's all it takes.
Yup. That's _nearly_ all there is to it. You need to change the +12v into +5v, and
disconnect the -5v entirely. You can modify a single chip by bending pin 8 up and folding
it over and soldering it to pin 9 (may need a bit of wire), and clipping off pin 1
completely.
For reference, here's the pinouts:
---..--- ---..---
-5v -|1 16|- Gnd n/c -|1 16|- Gnd
Din -|2 15|- /CAS Din -|2 15|- /CAS
R/W -|3 14|- Dout /WE -|3 14|- Dout
/RAS -|4 13|- A6 /RAS -|4 13|- A6
A0 -|5 12|- A3 A0 -|5 12|- A3
A2 -|6 11|- A4 A2 -|6 11|- A4
A1 -|7 10|- A5 A1 -|7 10|- A5
+12v -|8 9|- +5v Vcc -|8 9|- A7
-------- --------
4116 4164
You can also modify the board. If you tie pin 1 of the sockets either high or low, you can
also use 41256's.
-Ian