[TUHS] re: 6-bit, 7-bit and 9-bit byte UNIXes

dmr at plan9.bell-labs.com dmr at plan9.bell-labs.com
Mon Oct 4 11:56:25 AEST 2004

Greg Lemis wondered,

 > On page 182 of K&R 1st edition there's a reference to an
 > implementation of C on the Honeywell 6000, with 9 bit bytes.  There's
 > no mention of whether it was running UNIX.

That one was a C implementation under GCOS.  There
was another 9-bit one for the PDP-10 (not using Unix).
There was a 4x9 bit version of Unix for the Univac 1100
series, which ran Unix as a guest system over the
native EXEC OS.

The most exotic version was the BBN C-machine, which
had 20-bit words, 10-bit bytes.


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