cottrell@nbs-vms.ARPA (02/12/85)
/* Henry Spencer writes... > Actually, a friend who got one of the first 780's outside DEC, and had > DEC people working with them for a while getting it running, mentioned > one other thing that compatibility mode doesn't support: the MARK > instruction. This omission is (I believe) undocumented, but it's not > surprising that nobody has noticed the absence of the most useless > instruction ever added to the 11... > -- It's WORSE than useless. I suspect the reason DEC shyed away from supporting separate I/D in space in RSX etc. is that it won't work with mark. Mark executes off the stack! Somebody goofed royally. jim */