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From: pnakada@oracle.com (Paul Nakada)
Newsgroups: comp.sys.apple2
Subject: Re: apple // and multitasking, perfect together! (??????????)
Message-ID: <PNAKADA.90Mar6163032@pnakada.oracle.com>
Date: 7 Mar 90 00:35:07 GMT
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In-reply-to: tbrakitz@phoenix.Princeton.EDU's message of 6 Mar 90 19:40:57 GMT


This is actually kind of cool, the concept of all memory acces being
done through load and store instructions.  That would allow
implementation of virtual memory quite easily though these
instructions.  Just map all of the pseudo machine's memory into non
volatile (above $0800) and use any additional memory for paging.  

I think that some sort of elementary VM is necessary for any type of
multiprocess OS on the //.  

Will your BISC instruction set be a p-machine? (interpreted) or
compiled directly to assembly.  The former is more suited to a VM
environment.

-Paul Nakada
pnakada@oracle.com