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- Path: sparky!uunet!cis.ohio-state.edu!ucbvax!gnh-starport.cts.com!sbennett
- From: sbennett@gnh-starport.cts.com (Stephen Bennett)
- Newsgroups: comp.sys.apple2
- Subject: Re: Question about //e serial ports
- Message-ID: <m0moSv1-0000VnC@crash.cts.com>
- Date: 9 Nov 92 14:07:16 GMT
- Sender: daemon@ucbvax.BERKELEY.EDU
- Distribution: world
- Organization: The Internet
- Lines: 72
- X-Unparsable-Date: Sun Nov 08 92 at 20:37:48 (EST)
-
- morton@ceres.fccc.edu (Dan Morton) writes:
- > I'd like to hook up a modem to a //e. The //e
- > currently has a serial printer connected to a
- > super serial card. My questions are:
- >
- > 1) Is there any problem using this card for
- > a modem connection?
-
- It'll work fine, as long as you have the settings correct (see below) and
- the proper cable (same) :)
-
- > 2) Does the port support 9600 baud (I have
- > a Concord Data Systems modem)?
-
- Yup, it will: Here's how to set it. There's a black jumper block on the
- right side of the SSC as you look at the components. This is how you switch
- it between use for a modem or printer. Pull out the jumper, and put it in
- so that the point of the triangle is pointing UP (there should be the word
- MODEM over the block) instead of down (where the SSC should say TERMINAL).
- You also need to move switches 1-5, 1-6 and 1-7 to ON, and 2-7 to OFF.
- (There are two types of switches that have been used on the SSC. If you
- have rocker switches, the switch is ON when the top of the switch is pushed
- in. If you have sliding switches, the switch is ON when the switch has been
- slid to the top.)
-
- > 3) How do you select the speed?
-
- Switches 1-1 through 1-4 are for the baud rate settings. For 9600 baud,
- you should set them as: 1-1 through 1-3 OFF, 1-4 ON.
-
- Other switch information you may need is:
-
- Switch 2-1 should be set ON for 1 stop bit, OFF for 2 stop bits.
-
- Switch 2-2 should be set ON for 8 data bits, OFF for 7 data bits.
-
- Switches 2-3 through 2-4 control parity bits. For parity to be Even, set
- both 2-3 and 2-4 OFF, for parity to be Odd, set switch 2-3 ON and switch
- 2-4 OFF, and for No parity, set 2-4 ON (and switch 2-3 is ignored).
-
- For most communications uses, you can set switches 2-1 through 2-4 ON
- for N,8,1 parity and data bits... This may be different for your
- particular communication program, you'll have to see.
-
- Switch 2-5 should be set ON to automatically generate LF after carriage
- returns, OFF otherwise (I believe that you'll want this to be OFF).
-
- Switch 2-6 controls forwarding of interrupts to the Apple II. I believe
- that this should be set to OFF for the //e, so that interrupts won't be
- forwarded to the computer.
-
- > 4) What are the pinouts?
-
- It's a standard DB-25 connector, and if you've switched the jumper, that has
- the effect of having switched the Transmit Data and Receive Data pins (pins
- 2 and 3, as I recall) that's normally done in the modem cable, so you can
- use a standard straight through DB-25 cable, probably the same one as you
- were using to the printer, if I remember all of this correctly (It's been
- awhile since I've done much with SSCs, but this should be correct).
- If I'm incorrect about the cable, I'm sure someone will correct me, I'm
- pretty sure everything else is correct... :)
-
- > ----------------------------------------------------------------------------
- > Internet: morton@fccc.edu Fox Chase Cancer Center
- > Phone: (215) 728-3633 7701 Burholme Ave
- > Fax: (215) 728-2513 Philadelphia, PA 19111
- > ----------------------------------------------------------------------------
- ___________________________________________________________________________
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