10 May
2001
10 May
'01
6:37 p.m.
On Thu, 10 May 2001, Megan wrote:
I have an old serial paper tape reader which runs
with
20ma and would like to use it to archive all my pdp-11
(and some pdp-8) paper tapes. But I need a converter...
Can anyone help? Any pointers to a simple schematic?
As a quick and dirty alternative:
The original IBM asynch adapter for the PC and XT was jumperable to
operate as EIA OR 20 ma! You could use a PC with one jumpered 20ma plus
one "regular" serial card as your converter.
--
Fred Cisin cisin(a)xenosoft.com
XenoSoft http://www.xenosoft.com
PO Box 1236 (510) 558-9366
Berkeley, CA 94701-1236