On Mon, 27 Oct 2014, Clem Cole wrote:

[...] because the CMU 11/40E had special CSV/CRET microcode which we

could not use on the 11/34.

The 40E had microcode whilst the vanilla 40 didn't? I thought only the 60
was micro-programmable; I never did get around to implementing CSV/CRET on
our 60 (Digital had a bunch of them when a contract with a publishing
house fell through).

The other things for those days, that has not yet been brought up was

the famous "NUXI" problem. The PDP-11 byte swapping was idemic in the

code. When the first ports to system that were not the same

"endianess" came about - you would find strange things in memory.

Reminds me of the time when I used 2-char constants in case statements; my
boss yelled at me.

--
Dave Horsfall (VK2KFU) "Bliss is a MacBook with a FreeBSD server."
http://www.horsfall.org/spam.html (and check the home page whilst you're there)