Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!uunet!sco!seanf
From: seanf@sco.COM (Sean Fagan)
Newsgroups: comp.sys.m68k
Subject: Re: 68040 not object code compatible?
Message-ID: <4975@scolex.sco.COM>
Date: 25 Feb 90 21:06:33 GMT
References: <300003@hpclkms.HP.COM>
Reply-To: seanf@sco.COM (Sean Fagan)
Organization: The Santa Cruz Operation, Inc.
Lines: 13

In article <300003@hpclkms.HP.COM> ken@hpclkms.HP.COM (Ken Sumrall) writes:
>In the table on page A-3, the CALLM instruction is shown to be implemented
>only on the 68020.  However, on page 1-1, the 68040 is claimed to be
>user object code compatible with previous members of the 68000 family.

Only one member of the 68k family implements the CALLM (and RETM)
instructions:  the 68020.  Nobody used it, apparantly, so it was dropped by
the time the '30 came out.

-- 
Sean Eric Fagan  | "Time has little to do with infinity and jelly donuts."
seanf@sco.COM    |    -- Thomas Magnum (Tom Selleck), _Magnum, P.I._
(408) 458-1422   | Any opinions expressed are my own, not my employers'.