Path: utzoo!utgpu!watmath!clyde!att!lzaz!bds
From: bds@lzaz.ATT.COM (B.SZABLAK)
Newsgroups: comp.os.minix
Subject: Re: (IBM V1.3) tty1 performance?  Really Virtual Memory for pc minix
Summary: ST Implementation a guide for large model PC MINIX?
Keywords: virtual memory
Message-ID: <286@lzaz.ATT.COM>
Date: 30 Nov 88 13:23:03 GMT
References: <5687@louie.udel.EDU> <760@sdcc15.ucsd.edu> <6149@fluke.COM>
Organization: AT&T ISL Lincroft NJ USA
Lines: 21

In article <6149@fluke.COM>, dcd@tc.fluke.COM (David Dyck) writes:
# 
# John J Marco had a suggestion:
# 
# > .........  (An even better idea would be for
# > somebody to implement virtual memory for MINIX so that programs could
# > be as large as memory.  ...
# 
# Back in Jan '88  MBECK@ai.ai.mit.edu (Mark E. Becker) posted
# 
# ... To overcome this memory constraint one could
# rewrite Minix based upon a larger memory model, a very messy proposition
# indeed, ...

Given a compiler that supports the large model for the PC, it seems to
me that the one would just have to implement the "shadow" technique
and change the exec code to handle relocation - nothing not already
found in ST MINIX.

Unfortunately, performance would suffer in those cases where large model
is overkill...