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- Newsgroups: comp.sys.apple2
- Path: sparky!uunet!usc!elroy.jpl.nasa.gov!nntp-server.caltech.edu!toddpw
- From: toddpw@cco.caltech.edu (Todd P. Whitesel)
- Subject: Re: HELP: 9600bps modem won't work (2nd request)
- Message-ID: <1992Aug13.093716.27916@cco.caltech.edu>
- Sender: news@cco.caltech.edu
- Nntp-Posting-Host: bartman
- Organization: California Institute of Technology, Pasadena
- References: <1992Aug12.060048.21300@cco.caltech.edu> <1992Aug13.052733.11609@nuscc.nus.sg>
- Date: Thu, 13 Aug 1992 09:37:16 GMT
- Lines: 47
-
- isc10327@nusunix3.nus.sg (ONG TAT-WEE) writes:
-
- > Do you think you can post your modem cable pinouts here for me?
- >Seems that everyone is saying that high-speed modems need hardware
- >handshaking. I would like to compare your cable pinouts with mine.
-
- I bought my cable surplus, and the voltmeter is packed away right now, so
- here's a pinout that was posted to the net earlier:
-
- ===========================================================================
- In <53454.539217028@kcbbs.gen.nz>
- Corey_Murtagh@kcbbs.gen.nz (Corey Murtagh) writes:
-
- > Does anyone out there in Net.Land have the pin connections to use for a
- >CTS/RTS handshake compatible serial cable for the GS? I am currently using
- >one that I hacked together based on the diagram in the Hardware Ref. for the
- >GS, but some programs tend to barf quite badly on it, 'cause it doesn't
- >support the hardware handshakes.
- > Oh, yeah. please post here (to CSA2), as I think others may be interested.
-
- In Greg Schaefer's ProTERM v3.0 manual, the suggested wiring for an Apple
- IIgs/IIc+ modem cable is (and it works -- I got ranges of 2690-3264 cps
- downloading textfiles from the Hayes BBS with an Intel 14.4ex):
-
- Computer Port Modem Signal Name
- (Male MINI DIN-8) (Male DB25)
- 3 2 TD (transmit data)
- 5 3 RD (receive data)
- 4 7 GND (signal ground)
- Short 8 to 4 GND (signal ground)
- 2 5 CTS (clear to send)
- 1 4 RTS (ready to send)
- Short 4 to 20 DTR (data terminal ready)
- 7 8 DCD (data carrier detect)
-
- NOTE: This cable requires that "short circuits" be placed in the cable. This
- consists of creating a "Y" connection between the three pins. On the MINI
- DIN-8 end, pins 4 and 8 should be connected to each other as well as to pin
- 7 of the DB25. On the DB 25 end, pins 4 and 20 should be connected to each
- other as well as to pin 1 of the MINI DIN-8.
- ==========================================================================
-
- Let me know if it works. When I find the voltmeter I will check my cable and
- see what its pinout is.
-
- Todd Whitesel
- toddpw @ tybalt.caltech.edu
-