Matt Burke <m...@9track.net> wrote: > Whilst experimenting with a new device on VAX/VMS V4.5 I got a fatal > bugcheck (exception whilst above ASTDEL). The problem turned out the be > a reserved operand fault and I traced it back to the following code > (shown here from the VMS 3.0 source listings): > > MOVL PCB$L_PHD(R0),R0 ; Get PHD address > MOVB PHD$B_ASTLVL(R0),R0 ; And fetch ASTLVL > MTPR R0,#PR$_ASTLVL ; Update current value
FWIW, the sequence does not appear to be present in 3.7-dev, 4.0 or 7.3 sources. (For 3.x and 4.x I checked only ASTDEL, not ASMP code -- speaking on which, would not it be fun to emulate 11/782 or 11/784?) Is this exact sequence actually indicated by the instruction trace when running 4.5? Thanks,Sergey
_______________________________________________ Simh mailing list Simh@trailing-edge.com http://mailman.trailing-edge.com/mailman/listinfo/simh
