dlb5404@tamuts.tamu.edu (Daryl Biberdorf) (02/19/91)
I was going to hook up the old C.Itoh Prowriter 8510 this weekend
when I noticed that my 3B1 uses a female centronics connector instead
of the more common DB-25 for its parallel port. After calling around,
no local businesses stock the male centronics-male centronics cable I need
and special ordering it looks like it will cost more than I think it should.
:) So I guess I'll make my own.
Anyway, I have the pinouts for the printer (equivalent to the Apple
Imagewriter I and the AT&T 470, I believe), but I don't have them
for the computer. Can anyone help?
In case it matters, here are the pinouts for the Prowriter:
Pin Signal Name
1 DATA STB' (' indicates low true)
2-8 data (2 is LSB, 8 is MSB)
10 ACK'
11 INPUT-BUSY
12 PE
13 SELECT
14 0 V.
15 not connected
16 0 V.
17 CHASSIS GND
18 +5 V. DC
19-30 TWISTED PAIR GND (for pins 1-11 and 31, in order.
What are these for? couldn't tell.)
31 INPUT PRIME'
32 FAULT'
33 0 V.
34 not connected
35 not connected
36 INPUT BUSY
These pin numbers are for the standard 36-pin Centronics-style connector.
Will I need a full 36-conductor cable to accomplish all these connections?
(33 if I ignore the NC pins) If so, how does a clone accomplish
parallel communications with a DB-25 connector and still allow for
communications TO the machine through that connector?
Thanks in advance for any help you can provide.
--Daryl Biberdorf, dlb5404@{rigel,tamuts}.tamu.edu
Texas A&M University