Trailing-Edge - PDP-10 Archives - bb-ee87a-sb - 10,7/doc/ucode.bwr
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January 1985

Copyright (C)1977,1978,1979,1980,1981,1982,1983,1984,1985
Digital Equipment Corporation, Maynard, Mass.

This software is furnished under a license for use only  on  a  single
computer system and may be copied only with the inclusion of the above
copyright notice.  This software, or any other copies thereof, may not
be provided or otherwise made available to any other person except for
use on such system and to one  who  agrees  to  these  license  terms.
Title  to  and  ownership of the software shall at all times remain in

The information in this software is subject to change  without  notice
and  should  not  be  construed  as  a commitment by Digital Equipment

DEC assumes no responsibility  for  the  use  or  reliability  of  its
software on equipment which is not supplied by DEC.
KL MICROCODE BEWARE FILE -- V2(400)                             Page 2

KL-UCODE.BWR -- v2(400)
January 1985


     Extend instructions will behave differently when  MBZ  fields  in
the  AC  argument  block are not zero.  Previous releases of microcode
treated these errors  as  a  non-skip  return  from  the  instruction.
V2(400) causes an Illegal Instruction trap (UUO) instead.

1.1  Bug Solutions