[TUHS] Command-line options

Greg 'groggy' Lehey grog at lemis.com
Sun Mar 27 16:57:22 AEST 2016

On Sunday, 27 March 2016 at  2:18:33 -0400, Random832 wrote:
> On Sat, Mar 26, 2016, at 22:01, Greg 'groggy' Lehey wrote:
>> All octal from here on.
>> CDC had several different character sets, most called BCD.  They were
>> unlike Fieldata, which in fact bore some resemblance to ASCII (letters
>> starting @ABC.. from 0 (or 40 in ASCII), digits starting at 60, ...)
> Wikipedia mentions one called "CDC display code" that went :ABC..., then
> the digits followed after Z.

Ah, right.  That was on my table too, but I didn't understand it.

> Also, according to Wikipedia, Fieldata was a seven-bit code

Yes, I saw that too.  As used on the big UNIVACs, only the low-order 6
bits were used.  I note that the upper 64 characters include control

> with A at 006 (putting Z at 037) it wasn't ASCII-like at all, except
> for having the letters in a continuous run.

Hmm.  Somewhere I read a different version where the A followed
directly after the @.  I stand corrected.

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