Pin 1 (Carrier Detect) on Null Modem Cable

Hewitson · 15 December 2012, 14:32

With my current setup my null modem cable no longer reaches the 2000. I was looking for a longer one on ebay when I discovered that none of them seem to have pin 1 connected to anything, is this a concern?

Ed Cruse · 15 December 2012, 17:39

Quote:

Originally Posted by Hewitson

With my current setup my null modem cable no longer reaches the 2000. I was looking for a longer one on ebay when I discovered that none of them seem to have pin 1 connected to anything, is this a concern?

I think for a null-modem cable it probably isn't a problem. The only time I know of that a program would want to look at the carrier detect is when connected to a modem, which usually requires a straight cable instead of a null-modem cable. Going from computer to computer it shouldn't be needed.

prowler · 15 December 2012, 20:42

The Amiga Explorer null-modem cables use the Data Carrier Detect signal (DB9 Pin 1, DB25 Pin 8), though admittedly it's doubled up with the Data Set Ready signal (DB9 Pin 6, DB26, Pin 6).

http://www.amigaforever.com/kb/13-105

orange · 15 December 2012, 21:00

I (also) think it depends on software whether you need it. most of time simple 3-wire cable is enough (but more is desirable, ofc).

15 December 2012, 14:32	#1
Hewitson Registered User Join Date: Feb 2007 Location: Melbourne, Australia Age: 41 Posts: 3,773	Pin 1 (Carrier Detect) on Null Modem Cable With my current setup my null modem cable no longer reaches the 2000. I was looking for a longer one on ebay when I discovered that none of them seem to have pin 1 connected to anything, is this a concern?

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15 December 2012, 20:42	#3
prowler Global Moderator Join Date: Aug 2008 Location: Sidcup, England Posts: 10,300	The Amiga Explorer null-modem cables use the Data Carrier Detect signal (DB9 Pin 1, DB25 Pin 8), though admittedly it's doubled up with the Data Set Ready signal (DB9 Pin 6, DB26, Pin 6). http://www.amigaforever.com/kb/13-105

15 December 2012, 21:00	#4
orange Registered User Join Date: Apr 2007 Location: Belgrade Posts: 567	I (also) think it depends on software whether you need it. most of time simple 3-wire cable is enough (but more is desirable, ofc).

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