10 Mar
1999
10 Mar
'99
1:24 p.m.
Arfon Gryffydd <arfonrg(a)texas.net> wrote:
Anyone know a where I can find an old RS-232 Acoustic
coupled modem?
Keep looking, they turn up.
How about the specifications for paper-tape (i.e. hole
spacing, paper
width, etc.)?
Hole spacing is 0.1". 8-level tape is 1" wide, with 3 holes, then a
smaller-diameter sprocket hole, then 5 holes. There also exist 7- and
5-level tapes which are simply narrower (3+1+4, 3+1+2), and maybe also
a six-level tape but I don't know what used it. Somewhere I have what
looks to be a parallel tape reader with a knob that rotates
different-width guides into place, but it has no manufacturer
information.
-Frank McConnell