22 Apr
1998
22 Apr
'98
11:10 a.m.
On Apr 22, 1:57, Tony Duell wrote:
I thought of that too. Then you might be able to do it with an AOI package,
but I'd use a 156, which is a demultiplexer/decoder but with open-collector
outputs, which I'd wire-AND.
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
Jack Peacock wrote:
'No, I can
do it with a normal 16 pin TTL chip that doesn't have to go
in a programmer first'. So, what was the chip ?
74LS138, 1 of 8 decoder, the three inputs go to A, B, C, all 8
possibilities decoded on the outputs.
Alas not.. I didn't want the 8 separate combinations of the 3 input
variables - I wanted a single output that was a complex function of them
- something like A.C + A.B/ + A/.C/.B or something...