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- Path: sparky!uunet!cs.utexas.edu!swrinde!mips!mips!munnari.oz.au!jabaru.cec.edu.au!tanus!d10590
- From: d10590@tanus.oz.au (Robert Chalmers)
- Newsgroups: comp.os.coherent
- Subject: COM1..4 setup/addition to FAQ
- Message-ID: <1992Aug22.054509.25306@jabaru.cec.edu.au>
- Date: 22 Aug 92 05:45:09 GMT
- Sender: root@jabaru.cec.edu.au (Superuser)
- Organization: Pro-Net Australia
- Lines: 98
-
- Apart from the following information, the biggest problem is the init strings
- set to yo~rur modem by /etc/modemcap.
- Problems with the ports under Coherent seem to be the biggest
- single cause for concern that users have, at least initially.
- In an attempt to help, I have put together the following information
- based on my setup, which I think is not too different from the 'norm'.
- Coherent V4.0/4.01.
-
- Firstly:
- If you follow the installation instructions, and choose their defaults,
- you will end up with a ttys file very similar to the following.
-
- 0lPcom1l <--|
- 0lPcom2l | -- The four standard COM1, COM2,
- 0lPcom3l | COM3 & COM4 ports. NOT CONFIGURED.
- 0lPcom4l <--| See the notes below for configuration.
- 1lPmono0 <--|
- 1lPmono1 | -- The terminal virtual consoles.
- 1lPmono2 | These REPLACE the V3.x's 1Pconsole
- 1lPmono3 <--| entry in that versions ttys file.
- You dont have to touch these.
-
- On my system I have the following hardware.
- One standard HDD/FDD Controller (IDE) with COM1, COM2 and LPT1
- on board, and enabled. These live at 3F8 - IRQ4, and 2F8 - IRQ3.
- LPT1 uses 378 and IRQ7.
-
- One standard Taiwan Multi I/O card with 2 COM ports, one printer
- port, and one game port. This card can be configured as COM1/2
- or COM3/4, and LPT1 or LPT2. I have the jumpers set for the
- following. COM3 at 3E8 - IRQ4 and COM4 at 2E8 - IRQ3, with the
- second printer, LPT2 at 278 - IRQ5.
-
- Now, setting them up, as applied to this type of 2 board setup.
- If you are not sure if your installation configured the ports correctly,
- then follow the instructions in the Release Notes and Installation Guide
- under 'Asy' exactly as they appear, regarding the making of the devices.
- Dont change anything. yet.
- Now, the thing to note is the rule on IRQs and Polling. If you are using
- COM2 as your modem port, (seems to be the most used option), and COM1
- as a terminal connection, and both are using IRQs, then the other two
- must be Polled. COM3 and COM4 must be Polled. Observe my settings listed,
-
- 0lPcom1l <--- Serial terminal on COM1. IRQ4
- 1rLcom2r <--- Modem, incoming, on COM2. IRQ3
- 0lLcom2l <--- Modem, outgoing (the same modem) on COM2. IRQ3
- 0lPcom3pl <--- Serial terminal on COM3. Polled
- 0lPcom4pl <--- Serial terminal on COM4. Polled
- 1lPmono0 <-|
- 1lPmono1 |
- 1lPmono2 | --virtual screens.
- 1lPmono3 <-|
-
- The Serial terminals are shown as 'disabled' in the above listing,
- but when they are connected, you simply type 'enable com3pl' and
- presto!, you get a login prompt on that terminal.
- In SUMMARY:
- Install with all defaults.
- Run the three configuration commands in the Asy entry.
- The asyxxx entries in your /dev directory are the prototypes for
- the comxx devices, so you can ignore them for the purposes of this.
- Decide which lines you will use, and check your IRQ/Poll combination.
- Check your physical wiring. You only need three wires.
-
- D25 connectors. TXD to RXD, RXD to TXD, Common Ground.
- 2 --> 3
- 3 <-- 2
- 7 <-> 7
- D9 connectore. TXD to RXD, RXD to TXD, Common Ground.
- 2 --> 3
- 3 <-- 2
- 5 <-> 5
-
- In the above setting, to call out on the modem, you MUST type
- 'disable com2r' before you can call out on com2l. When you are
- finished, type 'enable com2r' to put your modem back on line.
-
- Other things of note: Old Xt's with a com port and any version of
- TELIX/PROCOMM/etc etc make good cheap terminals. So do old terminals
- that businesses throw away as obsolete.
-
- Windows 3.1's Terminal will emulate a vt100, and its 'almost!' like
- having Xterm running Coherent in a Term window. You can even cut and
- paste between Word for Windows etc and vi. So who needs X I ask.
-
- One of these days I will get lucky and own an 8-port serial board,
- but until then, we make do.
- Hope that helps.
- Bob.
-
-
- _________________________________________________________________________
- |Robert Chalmers. d10590@tanus.oz.au Mackay, Queensland. Australia|
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