25 Feb
2008
25 Feb
'08
6:59 p.m.
On Feb 25, 2008, at 9:53 PM, Richard A. Cini wrote:
On 2/25/08 9:40 PM, "David Griffith" <dgriffi at cs.csubak.edu> wrote:
Yes that is basically what the Altair 88-ACR card was. There were two
parts to it, the main board that was a single channel serial card,
minus the RS232 line driver, and a daughter card which was basically a
FSK modem.
-Mardy
This paper tape fiddling made me wonder if anyone
ever made a
cassette
tape interface that emitted RS232 signals and looked to the
computer like
a paper tape reader/writer.
Isn't that what the 88-ACR board did? I'd have to pull the book, but
IIRC,
it was an audio processing board connected to an SIO board. That's
why the
MITS Absolute Tape Format worked -- the format of the paper tape and
cassette were the same but the media was different.
Rich
--
Rich Cini
Collector of Classic Computers
Build Master and lead engineer, Altair32 Emulator
http://www.altair32.com
http://www.classiccmp.org/cini