tericks@plains.NoDak.edu (Terry Erickson) (06/13/91)
Greetings,
I have a question about a NEC APC.
I am trying to hook up a modem to that computer, BUT its port on the
back is no normal Serial Port, it looks more like the Centronics Parallel
Printer port (Cent 36 I think) instead of a DB25. And I seemed to have
misplaced my manuals for the pinouts on that type of Serial Port, could
anyone give me some assistance??
That way, with a little help from a Jumper Box and a normal Parallel
Printer cable, I could have Modem Communications.
Any and all comments are welcomed,
Terry Ericksondonm@pnet07.cts.com (Don Maslin) (06/14/91)
tericks@plains.NoDak.edu (Terry Erickson) writes: > I have a question about a NEC APC. > > I am trying to hook up a modem to that computer, BUT its port on the >back is no normal Serial Port, it looks more like the Centronics Parallel >Printer port (Cent 36 I think) instead of a DB25. And I seemed to have >misplaced my manuals for the pinouts on that type of Serial Port, could >anyone give me some assistance?? > That way, with a little help from a Jumper Box and a normal Parallel >Printer cable, I could have Modem Communications. Following is a tabulation of: Table 3-20 Serial I/O Connectors Pin Assignments Pin # Pin # Pin # Signal at A at B at C Remarks ----------------------------------------------------------------- Frame Ground 1 1 1 SD 2 2 3 Send Data RD 3 3 5 Receive Data RS 4 4 7 Request to Send CS 5 5 9 Clear to Send DR 5 5 11 Data Set Ready Signal Ground 7 7 13 CD 8 8 15 --------------------------------------------------- 9 9 17 No Signal 10 10 19 11 11 21 12 12 23 13 13 25 14 19 2 --------------------------------------------------- ST2 15 20 4 Transmit Clock (TxC) --------------------------------------------------- 16 21 6 --------------------------------------------------- RT 17 22 8 Receive Clock --------------------------------------------------- 18 23 10 19 24 12 No Signal --------------------------------------------------- ER 20 25 14 Data Terminal Ready --------------------------------------------------- 21 26 16 22 27 18 No Signal 23 28 20 --------------------------------------------------- ST1 24 29 22 Transmit Clock (RxC) --------------------------------------------------- 25 30 24 No Signal --------------------------------------------------- NOTE: 'A' is at the modem connector 'B' is at the back panel connector 'C' is at the processor board header I infer that the serial connector is the right hand one, but I'm not sure. Hope this helps. - don Keeper of the CP/M System Disk | UUCP: {nosc ucsd crash ncr-sd}!pnet07!donm Archives for the Dino(saur)SIG | ARPA: simasd!pnet07!donm@nosc.mil - San Diego Computer Society - | INET: donm@pnet07.cts.com