[comp.sys.apollo] 3 way db-25 pin outs

wescott@LNIC2.HPRC.UH.EDU (Andrew M. Wescott) (01/09/90)

Here are the pin-outs everyone is asking about:

(Figure 3-7 DS3500, DS4000, and DS4500 P2 SIO Three-Port Connector,
on page 3-11 of Domain Personal Workstations and Servers Technical
Reference # 008778-A01 )


  Pin #             Signal              Pin #            Signal
--------          ----------        ------------     -------------

   1               ground               16            sio2_dcd
   2               sio1_txd             18            sio2_dtr
   3               sio1_rxd              9            sio3_rxd
   4               sio1_rts             10            sio3_cts
   5               sio1_cts             19            sio3_dtr
   7            in-line resistor        21            sio3_txd
   8               sio1_dcd             23            sio3_rts
  11               sio1_p11             25            sio3_dcd
  20               sio1_dtr              6            spare
  12               sio2_txd             17            spare
  13               sio2_rxd             22            spare
  14               sio2_rts             24            spare
  15               sio2_cts  

krowitz%richter@UMIX.CC.UMICH.EDU (David Krowitz) (01/09/90)

Just out of curiosity ... does anyone know what pin 11
(sio1_p11) *does*  (ie. what is it used for when it's
connected)?


 -- David Krowitz

krowitz@richter.mit.edu   (18.83.0.109)
krowitz%richter.mit.edu@eddie.mit.edu
krowitz%richter.mit.edu@mitvma.bitnet
(in order of decreasing preference)