From DECsystem-10 / DECSYSTEM-20 Processor Reference Manual (June, 1982)
MOVEI AC,1
SETZ AC+1, ;Big binary integer
MOVEI AC+3,1 ;One digit byte
EXTEND AC,[CVTBDO] ;Convert will abort
TLNE AC+3,200000 ;Test effect on N
JRST KL10 ;KL10 if N set
JRST KS10 ;KS10 if N unaffected
From TOAD-1 System Architecture Reference Manual (April, 1997)
CVTBDO Convert Binary to Decimal Offset
[...]
CVTBDT Convert Binary to Decimal Translated
[...]
Caution: In the KL10 the N and M flags are set up first and
may therefore be affected even by an instruction that is
aborted becuase the binary integer is too large.