(1) The DB25<->DB9 adaptor which is supplied with the UltraLite is not wired
the same way as a standard PC/XT<->PC/AT serial adaptor. In addition to
the DB9 end being female instead of male, the wiring is different.
Here is the wiring:
DB9 DB25
--- ----
1 6
2 2
3 3
4 6
5 7
6 8,20
7 5
8 4
9 NC
S NC
[S=sheild, NC=no connection]
(2) The UltraLite serial cable has the following wiring with and without the
DB9 adaptor, referenced to the DIN connector:
DIN DB25 DB9 Function
--- ---- ---- --------
a 7 5 signal ground
b 8 6 carrier detect
c 20 6 DTR
d 3 3 receive data
e 4 8 RTS
f 5 7 CTS
g 6 1,4 DSR
h 22 NC ring indicator
i 2 2 transmit data
S S NC protective ground
[S=sheild, NC=no connection]
UltraLite DIN connector labels, as viewed from the pins:
a b c
d e f g
h i
I haven't yet been able to identify the DIN connector by model number or
DIN standard number. Has anyone else identified this connector and/or
found a source for spares?
--
-Brian Smithson
Motorola Inc., Computer Group, Commercial Systems Division
10700 N. De Anza Boulevard, Cupertino, CA 95014 USA, (408)366-4104
brian@csd.mot.com, {apple | pyramid}!motcsd!brian