13 Mar
2008
13 Mar
'08
6:55 a.m.
Date: Thu, 13 Mar 2008 01:25:00 -0800
From: hilpert at cs.ubc.ca
To: General at priv-edtnaa04.telusplanet.net
CC:
Subject: Re: Switch settings: Facit 4070 tape punch
"Roy J. Tellason" wrote:
(Yes, the AY-5-1013 is a hardware/switch/pin-configured UART. Can supply pinout
if needed.)
Hi
I've got the pinout someplace as well. These were used on almost all
the early serial cards ( serial/parallel ) used on Altairs and IMSAIs.
I have one in my IMSAI. I liked them because they required no
software init other than to clear the port.
The pinout is all one needs to use these. The software is obvious
Anybody know who made those parts with numbers
like AY-n-nnnn? I don't think
I have much data on those offhand.
General Instrument. Often there's a "GI" logo on their chips.
Dennis Boone wrote:
>
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. from the pin names. Even the status bits are from pins.
I think the SMS version started with COMxxxx.
Dwight
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