12 Mar
2008
12 Mar
'08
5:59 p.m.
> AY-5-1013 40 pin dip (cpu?)
UART, I think. I know I've run into that number
somewhere before.
If the 14411 is a baud rate generator, then this must be a uart,
especially as now that I look at the traces, the puzzling 8-pack
switches 1-5 go right to it.
FWIW, The rest of the label is "GIMT 7816U". No logo.
> MC14411P 24 pin dip (uart?)
Baud rate generator. Look for a crystal somewhere
close to that part.
Yup:
ITT
4729
7903
> 5-switch dip pack labelled with baud rates 75-600
Bet you can trace some of the connections from that
one to that MC14411
chip.
Yup, a whole half inch away.
De