Did you check the motherboard com port pinouts? I ran into a problem once
upon a time where I took the harness (25 pin serial) and tried to run a
modem off it in another motherboard. Didn't work. It seemed that the
original Motherboard manufacturer used a non-standard pinout and cable
wiring (had to swap 2 wires at the connector to make it work).
The only way to "see" what going on is to get the breakout box with the
LED's. It seems that it probibly is a cable/connector problem. You did
test both com ports (with a modem or whatnot) before you began???
Paul D. Farber II
Farber Technology
717-628-5303
[EMAIL PROTECTED]
On Tue, 28 Jul 1998, Joseph Martin wrote:
> Hello,
> I did have baud speed misconfigured. Although I fixed that, the
> terminal still does not work. When I type "show modem" in C-Kermit this is
> the output:
> Modem is not ready: DSR is off
> no carrier detect: CD is off (set carrier is off)
> no Clear to send: CTS is off
>
> With the serial config shown below shouldn't I have a modem ready status?
>
> PC male DB25 Terminal DB25
> TxD Transmit Data 2 --> 3 RxD Receive Data
> RxD Receive Data 3 <-- 2 TxD Transmit Data
> RTS Request To Send 4 --> 5 CTS Clear To Send
> CTS Clear To Send 5 <-- 4 RTS Request To Send
> DSR Data Set Ready 6
> |
> DCD Carrier Detect 8 <-- 20 DTR Data Terminal Ready
> SG Signal Ground 7 --- 7 SG Signal Ground
> 6 DSR Data Set Ready
> |
> DTR Data Terminal Ready 20 --> 8 DCD Carrier Detect
>
> Joseph Martin
>
> --
> [EMAIL PROTECTED] **************
> http://users.exis.net/ * Powered by *
> * GNU Linux *
> "Think different" **************
>
> On Tue, 28 Jul 1998, Paul Farber wrote:
>
> ::Do you have the correct baud rates and parity info set on the DOS
> ::terminal??
> ::
> ::Go buy yourself a breakout box with LED indicators and put that on your
> ::cable to see if any indo is going back and forth (green LED = high, red
> ::LED = low) and see if in fact you have any data going through. The bax
> ::might cost $10 or so but worth is.
> ::
> ::Paul D. Farber II
> ::Farber Technology
> ::717-628-5303
> ::[EMAIL PROTECTED]
> ::
> ::On Tue, 28 Jul 1998, Joseph Martin wrote:
> ::
> ::> Hello,
> ::> I have been trying to set up a terminal for my dad. He is using an old
> ::> 386 with a bootdisk running C-Kermit for MSDOS. I am running Linux 2.0.34
> ::> (Slackware 3.4). I am trying to use a null modem cable to connect out two
> ::> serial ports together. We are using the 25 pin serial ports. The null modem
> ::> adapter I bought at CompUSA did not work, so my dad took apart the serial
> ::> cable and rewired it to these specs:
> ::>
> ::> PC male DB25 Terminal DB25
> ::> TxD Transmit Data 2 --> 3 RxD Receive Data
> ::> RxD Receive Data 3 <-- 2 TxD Transmit Data
> ::> RTS Request To Send 4 --> 5 CTS Clear To Send
> ::> CTS Clear To Send 5 <-- 4 RTS Request To Send
> ::> DSR Data Set Ready 6
> ::> |
> ::> DCD Carrier Detect 8 <-- 20 DTR Data Terminal Ready
> ::> SG Signal Ground 7 --- 7 SG Signal Ground
> ::> 6 DSR Data Set Ready
> ::> |
> ::> DTR Data Terminal Ready 20 --> 8 DCD Carrier Detect
> ::>
> ::> The connect still does not work! I have Linux using agetty for the serial
> ::> connection. It ran for half an hour without any errors, but the terminal
> ::> showed nothing on the screen. Is that the right config for a serial PC-PC
> ::> connection? How can I test if the serial ports and cable actually work?
> ::>
> ::> Joseph Martin
> ::>
> ::> --
> ::> [EMAIL PROTECTED] **************
> ::> http://users.exis.net/ * Powered by *
> ::> * GNU Linux *
> ::> "Think different" **************
> ::>
> ::>
> ::
>
>
