28 Jun
2001
28 Jun
'01
11:51 a.m.
I can help you with the HP tape reader.
I has a simple 10 bit interface, 10 data bits out, a ready flag, and one
step command input. The 'logic' levels are 12 volt transistor drive
signals, active low.
This was used to attach to a special board that plugged into the HP2114
2115, 2116, 2100 and later HP minicomputers (my favorites).
"jos.mar" wrote:
A recent dumpster dive yielded a HP2748A papertape
reader. Does anyone have
the interface spec's for this device handy ?
Left in the dumpster were : a Facit 4070 punch, a hp(8900?) diskdrive with
power supply.
The disk, vintage early to mid seventies, really should be saved but since I
do not have a fitting computer....
(Location Zurich , Switzerland )
Jos Dreesen