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From: Dave Horsfall <>
To: Computer Old Farts Followers <>
Subject: Re: [COFF] DEC terminal line driver chips?
Date: Fri, 30 Apr 2021 17:42:04 +1000 (EST)
Message-ID: <> (raw)
In-Reply-To: <>

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On Thu, 29 Apr 2021, Clem Cole wrote:

> That said before you open up the case, I make sure you are cabled 
> correctly.   If you are using so-called 3-wire cables, then you need to 
> ensure RTS/CTS [4-5] are strapped and DSR/DCD/DTR [6/8/20] are also 
> strapped.   The terminal will ignore any I/O unless it sees these pins 
> asserted. 

I used to do that so often for so many terminals that I could practically 
do it in my sleep...  Having the correct crimping tool also helped :-)

-- Dave, who has yet to see a full implementation of RS-232 i.e. the 
secondary channel etc

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COFF mailing list

  reply	other threads:[~2021-04-30  7:42 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-29  7:02 Tom Ivar Helbekkmo via COFF
2021-04-29 12:21 ` Brad Spencer
2021-04-30  7:34   ` Dave Horsfall
2021-04-30 11:55   ` Tom Ivar Helbekkmo via COFF
2021-04-29 13:17 ` Clem Cole
2021-04-30  7:42   ` Dave Horsfall [this message]
2021-04-30 12:12   ` Tom Ivar Helbekkmo via COFF
2021-04-30 16:49   ` Derek Fawcus

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