29 Jun
2001
29 Jun
'01
8:41 p.m.
On Sat, 30 Jun 2001, you wrote:
The 2748A/B paper tape reader uses the "8-bit
duplex register interface".
That would lead me to believe it's an 8 bit interface, not a 16 bit one.
I have full docs (& schematics I believe) for both the 2748B and the 8-bit
duplex register interface board. I have two of those units presently
running, so I can get the cable pinout too if you'd like (but I believe the
cable diagram is in the interface manual). Let me know if you still need
them.
I believe I received enough info from the list to figure it out. I might come
back should i run into problems with this interface...
One word of caution about the facit 4070 punch... as I
found out when I got
mine - the facit had a board in it that was replaced depending on what
electrical spec the system you were attaching it to used. I seem to recall
that you had to specify which (of many) interfaces you wanted on the punch
when you ordered it. So just because you find a 4070 punch doesn't mean it
has the right board in it to hook up to the 8-bit duplex register board (hp
punches and readers both used the 8-bit duplex register board). Matter of
fact, unless it was found with an HP system, it probably DOESN'T have the
right board for the HP. You can't tell from the outside either, as I've seen
the RS-232 interface board in the punch presents a DB25 externally - just
the same as the HP version of the card does (which is decidedly NOT RS-232).
Jay West
>
The Facit was found with the HP reader and HP Disk subsytem, and has the full
length board with parallel interface. I did not have an HP relabeling however...
rgds,
Jos Dreesen