tjm@aaec.OZ (Tom Moss) (02/10/86)
We are useing a non-Apple modem to connect our Mac to the outside world. Does anyone know the D9 pin assignments nesescary to make up a D9to D25 cable. Tom Moss. Australian Atomic Energy Commission. .
halff@utah-cs.UUCP (Henry M. Halff) (02/10/86)
In article <599@aaec.OZ>, tjm@aaec.OZ (Tom Moss) writes: > > We are useing a non-Apple modem to connect our Mac to the > outside world. Does anyone know the D9 pin assignments nesescary to make up a D9to D25 cable. Here is one configuration that seems to work (at least for Red Ryder). Mac Modem 1 1 Frame Ground 2 No connection 3 7 Signal Ground 4 No Connection 5 2 Data 7 5 CTS 8 7 (not needed) 9 3 Data -- Henry M. Halff Halff Resources, Inc. halff@utah-cs.ARPA 4918 33rd Road, N., Arlington, VA 22207
bill@crystal.UUCP (Bill Cox) (02/11/86)
In article <3676@utah-cs.UUCP>, halff@utah-cs.UUCP (Henry M. Halff) writes: > Here is one configuration that seems to work (at least for Red Ryder). > > Mac Modem > 1 1 Frame Ground > 2 No connection > 3 7 Signal Ground > 4 No Connection > 5 2 Data > 7 5 CTS > 8 7 (not needed) > 9 3 Data I just made a cable for a USRobotics 2400; info comes from their tech support people. Mac(DB9) Modem(DB25) 3 7 Signal Ground 5 2 TxD+ 6 20 DTR 7 8 CD 9 3 RxD- others - NOT CONNECTED According to Macintosh Tech Note 10 (Pinouts), pin 8 on the mac end should be grounded to emulate RS232C; I did it, but I note that Halff@utah-cs says it isn't necessary. You should be able to set DIP switches on your modem to make either of these work. bill -- William Cox Computer Sciences Department University of Wisconsin, Madison WI bill@wisc.crys.edu ...{ihnp4,seismo,allegra}!uwvax!bill
ramin@rtgvax.UUCP (ramin firoozye) (02/13/86)
In article <599@aaec.OZ>, tjm@aaec.OZ (Tom Moss) writes: > > We are useing a non-Apple modem to connect our Mac to the > outside world. Does anyone know the D9 pin assignments nesescary to make up a D9to D25 cable. > > Tom Moss. > Australian Atomic Energy Commission. > . The following connections have worked for a Mac to Racal-Vadic modem link: DB-25 DB-9 ----- ----- 6 2 7 3 2 5 20 6 5 7 8 (jumpered to 5) 7 1 8 3 9 The remaining DB-25 pins should be unconnected. If this doesn't work you can always try plugging in your Applewriter cable. I had to make a cable by hand for a Mac w/ MacTerminal to VAX connection a while back. Hope it helps. ramin shasta!ramin@rtgvax.ARPA
halff@utah-cs.UUCP (Henry M. Halff) (02/16/86)
In article <22@rtgvax.UUCP>, ramin@rtgvax.UUCP (ramin firoozye) writes: > In article <599@aaec.OZ>, tjm@aaec.OZ (Tom Moss) writes: > > > > ... Does anyone know the D9 pin assignments nesescary to make up a D9to D25 cable. > > you can always try plugging in your Applewriter cable. The Applewirter cable is wired as a null modem. That is, pins 2 and 3 are reversed. It's perfect for sending data to another computer's RS-232 interface, but it won't work with a modem. -- Henry M. Halff Halff Resources, Inc. halff@utah-cs.ARPA 4918 33rd Road, N., Arlington, VA 22207