[time-nuts] Lady Heather's Leap Log

[Stanley Reynolds]

At 110 baud the ASR-33 needed a null charter or two as well or you
would get the first two charters on top of each other. So it was
CR,LF,Null,Null.

Stanley

http://www.pdp8.net/asr33/asr33.shtml






________________________________
From: Lester Veenstra <m0ycm at veenstras.com>
To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
Sent: Thursday, January 1, 2009 4:34:19 PM
Subject: Re: [time-nuts] Lady Heather's Leap Log

And at full CR/LF has been standard practice on mechanical printers
(teleprinters) from the beginning, to give the carriage time to return to
the left position. Otherwise, you can wind up with the first character of
the new line being printed in the middle of the line, as it tried to print
with the carriage in flight to the starting position.


Lester B Veenstra  MØYCM K1YCM
lester at veenstras.com
m0ycm at veenstras.com
k1ycm at veenstras.com


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-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Lux, James P
Sent: Thursday, January 01, 2009 4:10 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lady Heather's Leap Log




On 12/31/08 6:06 PM, "Steve Rooke" <sar10538 at gmail.com> wrote:

> 2009/1/1 Mark Sims <holrum at hotmail.com>:
>>
>> Note that there is an error in the first column heading in Lady Heather's
>> Leap Log.  It says UTC...  should be GPS.  The three line hour timestamp
>> comment is correct (UTC).  The distributed version of the program logged
only
>> time-of-week.  I added the HH:MM:SS yesterday but messed up the column
header
>> (boy is Lady Heather gonna be mad when She finds out).  The random
spacing is
>> due to Billy Gates Quality Control...  he still can't figure out where to
put
>> CRs and LFs in an email...
>
> Well, POSIX decided on LF, Mac on CR and Billy Boy decided to hedge
> his bets with both LF and CR. It's little wonder I always get a lot of
> double spacing here then :-)
>

Hardly microsoft's fault. Blame the teletype. Or perhaps DEC.  RT-11 stored
CR/LF in files, and CP/M adopted that convention, followed by DOS, etc.
I imagine RT-11 did CR/LF because
A) it allows use of unmodified KSR/ASR 33 TTYs without having to worry if
the user has the autoLF option
B) with ink on paper, the ability to do overprints (CR w/o LF) is actually
useful. Them newfangled CRT based terminals can't do this (except for the
Tek 401x series)


Jim


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