5 Feb
2012
5 Feb
'12
9:10 p.m.
On 05/02/2012 20:39, Glen Slick wrote:
http://www.bitsavers.org/pdf/dec/pdp11/1184/EK-1184A-TM-PR2_May85.pdf
Page E-2, To J1 on KDJ11-B (CPU)<-> CONSOLE DIST BOARD
That shows the normal pinout for similar SLUs on other processors an
serial cards.
http://www.bitsavers.org/pdf/dec/qbus/EB-23144-18_QbusIntrfs_1983.pdf
Page 284, 4. Pin out on the 2x5 pin connector block on the DLV11-J
Pin 2, Pin 5, Pin 9 Signal ground tied together, Connect to DB25 Pin 7
Pin 3 TRANSMIT DATA+ Connect to DB25 Pin 2 RXD
typo: TxD :-)
Pin 4 TRANSMIT DATA- Tied to signal ground (is this
correct?)
Yes, that's common, it forces one side of the differential (RS422)
signal to ground, making it single-ended.
Pin 7 RECEIVE DATA- Tied to signal ground
Pin 8 RECEIVE DATA+ Connect to DB25 Pin 3 RXD
Pin 10 +12V Connect (through resistor) DB25 Pin 20 DTR
--
Pete Peter Turnbull
Network Manager
University of York