[Info-vax] Off-Topic: UNISYS problems

[John Reagan]

On Friday, November 11, 2022 at 3:23:29 PM UTC-5, Scott Dorsey wrote:
> =?UTF-8?Q?Arne_Vajh=c3=b8j?= <ar... at vajhoej.dk> wrote: 
> > 
> >I think it did on CDC Cyber NOS. 
> > 
> >I remember seeing code adding B0 (always zero) to Xn to 
> >ensure that if Xn contained zero then it was plus zero 
> >not minus zero.
> AARGH! COMPASS! ONE'S COMPLEMENT! ADDRESS REGISTERS LINKED TO X 
> REGISTERS! SIX BIT BYTES! USING FLOATING POINT NORMALIZE INSTRUCTIONS 
> TO PROCESS STRINGS! MAKE IT GO AWAY! I'm hiding under my desk now.
> --scott 
> 
> -- 
> "C'est un Nagra. C'est suisse, et tres, tres precis."
My first assembly language I learned was COMPASS on a CDC-6500 (in 1979).  I still have my COMPASS manual.  Besides traditional "macros", the "micros" were intersting.