mkg@lzsc.ATT.COM (Marsh Gosnell) (10/23/89)
Is there any difference (other than a wait state) between a 68020 and the MMU and a 68030? This question came up at a user group meeting and I'd like to get the answer. Thanks. Marsh Gosnell mkg@lzma.att.com
alms@cambridge.apple.com (Andrew L. M. Shalit) (10/24/89)
In article <1178@lzsc.ATT.COM> mkg@lzsc.ATT.COM (Marsh Gosnell) writes:
Is there any difference (other than a wait state) between a 68020 and
the MMU and a 68030? This question came up at a user group meeting and
I'd like to get the answer.
The 68030 is missing some of the features of the 68851. I'm not sure
of the details. I've never heard anyone complain about these missing
features being essential.
-andrewngg@bridge2.ESD.3Com.COM (Norman Goodger) (10/25/89)
Re; Mac WareHouse..
oops..not kelly..."Kerry"...
--
Norm Goodger SysOp - MacInfo BBS @415-795-8862
3Com Corp. Co-SysOp FreeSoft RT - GEnie.
Enterprise Systems Division (I disclaim anything and everything)
UUCP: {3comvax,auspex,sun}!bridge2!ngg Internet: ngg@bridge2.ESD.3Com.COMAdam.Frix@f200.n226.z1.FIDONET.ORG (Adam Frix) (10/25/89)
Hmmm, Norm prefers Kerry over Donna. Perhaps this gives more credence to the idea that the general public prefers no glasses (Kerry) to glasses (Donna) on a woman. Corporations, of course, don't see no glasses (Kerry) as being smart enough, and hence require glasses (Donna) in their ads. TASTES GREAT! LESS FILLING! --Adam-- -- Adam Frix via cmhGate - Net 226 fido<=>uucp gateway Col, OH UUCP: ...!osu-cis!n8emr!cmhgate!200!Adam.Frix INET: Adam.Frix@f200.n226.z1.FIDONET.ORG
daveh@cbmvax.UUCP (Dave Haynie) (10/27/89)
in article <1178@lzsc.ATT.COM>, mkg@lzsc.ATT.COM (Marsh Gosnell) says: > Is there any difference (other than a wait state) between a 68020 and > the MMU and a 68030? This question came up at a user group meeting and > I'd like to get the answer. They're practically the same, software-wise. There are some 68851 instructions and addressing modes that aren't supported by the 68030 (these can be emulated, but it's better to use the 68030 subset, and most folks do), and the 68030 has two transparent translation registers that aren't supported by the 68851. The big change in MMUs comes with the 68040.... > Marsh Gosnell mkg@lzma.att.com -- Dave Haynie Commodore-Amiga (Systems Engineering) "The Crew That Never Rests" {uunet|pyramid|rutgers}!cbmvax!daveh PLINK: hazy BIX: hazy Too much of everything is just enough