rickb at bensene.com
Mon Feb 6 09:58:32 CST 2006
I've run across an old calculator that uses a couple of Signetics 8266 data
selectors (selects one of two groups of 4-bit inputs). The problem is that
this part is different than the 74157 -- it inverts one set of the inputs,
and its select inputs are different. There's not enough room in the circuit
board to kludge in a logical replacement, and I've searched high and low to
try to find a couple of these. I'm positive that one of them is bad, as I
can watch the inputs with a scope, and compare with the outputs, and there's
one data line that is stuck high.
Anyone out there happen to have one or two of these laying around that
they'd be willing to part with for a reasonable price, or, perhaps know of a
supplier where I might be able to buy a few of them?
The Old Calculator Wen Museum
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