cgwong@faraday.physics.utoronto.ca (Clint Wong) (06/14/91)
PLEASE REPLY TO ADDRESS BELOW! I am trying to get a hold of the 3-way serial port splitter for a Apollo 3550 unit. Would anyone have descriptions on building a cable for this. At this time work is unable to justify paying CDN$407 for such a cable. thanks for any assistance Gary. Gary Smith gary@osccsg.UUCP Ontario Science Centre Computer Systems Group ...!mnetor!becker!osccsg!gary Toronto, Ontario M3C 1T3 (416) 429-4100x228
wjw@ebh.eb.ele.tue.nl (Willem Jan Withagen) (06/14/91)
In article <1991Jun13.185804.17593@helios.physics.utoronto.ca>, cgwong@faraday.physics.utoronto.ca (Clint Wong) writes:
=> PLEASE REPLY TO ADDRESS BELOW!
=>
=> I am trying to get a hold of the 3-way serial port splitter for a
=> Apollo 3550 unit. Would anyone have descriptions on building a cable for
=> this. At this time work is unable to justify paying CDN$407 for such a
=> cable.
As far as I can tell are our private clones of the following construction:
Apollo 1 to 3 serial connector
Sio 1 Sio 2 Sio 3
1 - 1 1 - 1 1 - 1
7 - 7 7 - 7 7 - 7
2 - 2 2 - 12 2 - 21
3 - 3 3 - 13 3 - 9
4 - 4 4 - 14 4 - 23
5 - 5 5 - 15 5 - 10
8 - 8 8 - 16 8 - 25
20 - 20 20 - 18 20 - 19
Where every first column is the connection to the divided stream
The second column indicates the connection made in the joined connector
which goes in the apollo's back.
Willem Jan
--
Eindhoven University of Technology DomainName: wjw@eb.ele.tue.nl
Digital Systems Group, Room EH 10.10
P.O. 513 Tel: +31-40-473401
5600 MB Eindhoven The Netherlandsdwv%cadnet@UMIX.CC.UMICH.EDU (Doug Vander Wilt) (06/19/91)
From last week, gary@osccsg.UUCP (Gary Smith) writes: > I am trying to get a hold of the 3-way serial port splitter for a > Apollo 3550 unit. Would anyone have descriptions on building a cable for > this. At this time work is unable to justify paying CDN$407 for such a > cable. Well, I just verified some old notes I had on this subject. It's relaxing, once in a while, to just hide in the lab a few minutes to check continuity on a cable. This information is not guaranteed correct, but here's how the port expander (or "Multiple Serial Connector") is wired: Apollo Serial Port Expander: - Expands single DB25Female serial port to 3 - For use with: Apollo DN2500,3500,4000,4500 HP/Apollo 9000 series 400 - List price: K1015 $129 (1990 No. 1, "Instant Apollo" Catalog) Cable Connections: DB25Male RS232 sgnl Expanded (3 * DB25Female) ----------- ----------- ----------- 1 SG-- SG1, SG2, SG3 2 TD-> TD1 3 RD<- RD1 4 RTS-> RTS1 5 CTS<- CTS1 6 DSR<- 7 GND-- GND1, GND2, GND3 8 DCD<- CD1 9 +V RD3 10 -V CTS3 11 12 S_RDTCT<- TD2 13 S_CTS<- RD2 14 S_TD-> RTS2 15 DCE_CLK<- CTS2 16 S_RD<- CD2 17 RSET 18 DTR2 19 S_RTS-> DTR3 20 DTR-> DTR1 21 SQUAL TD3 22 RI<- 23 DRATE-> RTS3 24 DTE_CLK-> 25 CD3 Signal definitions: SG shield ground TD transmit data RD receive data RTS request to send CTS clear to send GND signal ground CD carrier detect DTR data terminal ready Entrepreneurial Opportunity! There may be a market for a DB25 to 3 * RJ11 style connectors instead of using the port expander. Then we could use readily available modular connectors, and hopefully save some money. The problem here is that I have never seen any standard way to run serial comm. across RJ cable. Danford uses this on their SEU-3400 4-serial-port AT board for Apollo. Does anyone know of another established standard? Doug Vander Wilt Sr. CAD/CAM Engineer Honeywell MICRO SWITCH Division dwv@cadnet.micro.honeywell.com