[TUHS] v7 K&R C

Rich Morin rdm at cfcl.com
Tue May 19 01:13:32 AEST 2020

> On May 17, 2020, at 09:24, Paul Winalski <paul.winalski at gmail.com> wrote:
> ...  The PDP-10 addressed memory in 36-bit units.  The character manipulating
> instructions could deal with a variety of different byte lengths:  you could
> store ... five ASCII 7-bit characters (with a bit left over) ...

IIRC, this format was called 5/7 IOPS ASCII.  The PDP-7, 9, and 15 computers used
a variant of this format, but they had to start with a pair of (18-bit) words.
Around 1970, I wrote a pair of (assembly language) routines to extract and insert
characters, because our PDP-15 did NOT have character manipulating instructions.


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