[Info-vax] Off-Topic: UNISYS problems

[Arne Vajhøj]

On 11/11/2022 3:23 PM, Scott Dorsey wrote:
> =?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.

Switching from Compass to Macro-32 was a huge step forward.

:-)

Arne