Subject: Re: Behavior of DTR changed between 1.3.3 and 1.4.1???
To: der Mouse <mouse@Rodents.Montreal.QC.CA>
From: Dave McGuire <email@example.com>
Date: 10/04/1999 13:55:30
On Mon, 04 Oct 1999, der Mouse wrote:
>I once got a library to dig up a copy of RS-232C. I don't know about
>earlier revs, but the standard I read definitely did not use TTL signal
>levels. I no longer have it at hand, but to the extent that my memory
>can be relied upon, this paragraph is right:
>> Indeed what it all boils down to is that a logic "1" value is
>> represented by a voltage between +3 and +25 VDC, and a logic "0"
>> value is represented by a voltage between -3 and -25 VDC.
Umm, I believe those levels are inverted. A "1" is represented by the
negative voltage, and a "0" was represented by the positive. That stuck in my
mind from way back because it's...well, inverted. :-)