[Info-vax] Off-Topic: UNISYS problems

Scott Dorsey kludge at panix.com
Fri Nov 11 15:23:26 EST 2022


=?UTF-8?Q?Arne_Vajh=c3=b8j?=  <arne 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."



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