Path: utzoo!attcan!utgpu!watmath!clyde!att!pacbell!ames!joyce!sri-unix!garth!smryan From: smryan@garth.UUCP (s m ryan) Newsgroups: comp.os.misc Subject: Re: Cobol Data Corporation Cyber 180 (was Re: 64 bits) Message-ID: <2387@garth.UUCP> Date: 11 Jan 89 03:41:46 GMT References: <28200249@mcdurb> <451@babbage.acc.virginia.edu> <1951@scolex> <2618@ficc.uu.net> <1128@raspail.UUCP> <2371@garth.UUCP> Reply-To: smryan@garth.UUCP (s m ryan) Organization: intergraph/apd in sunny california Lines: 19 >This has little to do with the operating system, but more to do with >the underlying hardware. UNIX on certain enlightened systems have >both features. It's just hard to implement these things portably >when you may or may not be able to support them on a given architecture. It has alot to do with the operating system. VSOS virtual memory is essentially a flat one-segment model, but the operating system supports file mapping and something akin to segments with Q5MAPIN. (Geez, I didn't think VSOS could teach anything to anybody.) The problem is expecting Unix to run on a PDP-11 and machines with real VM. -- So Loki left for elves of night, -- s m ryan who lived anigh the halls of plight. He found a pike who swam alone -- Andwari's Gem and cast the drowning net of Ron. -- 1/8