29 Jun
2001
29 Jun
'01
8:31 p.m.
On Fri, 29 Jun 2001, you wrote:
The HP2748 I rescued has a very old style 50 pins connector,
in 4 rows 13-12-13-12 pins.
Only 11 pins are used, so it is bound to be an 8 bit interface.
With the info give here that it is 12V negative logic, I should be able to
find out the connections and wire up an interface board to the PDP/8E.
I did not take the Factit 4700 because I already have 2...
They come indeed with many different boards. One has a RS232 interface, the
other has a 8 bit parallel interface that I hacked to be centronics -like. This
way I could punch some tapes from the PC to be used on the 8/E
Regards,
Jos Dreese
At 09:22 PM 6/28/01 +0200, you wrote:
I suspect this is highly likely since the 16 bit parallel interfaces,
like the 82032, 98032 (for the 9825, etc) were used for many character-based
(and other) peripherals.
A recent dumpster dive yielded a HP2748A papertape
reader. Does anyone have
the interface spec's for this device handy ?
I think *some* of HP's paper tape punches and readers use the 82032
parallel interface. It's a 16 bit parallel interface with several