2.11BSD, non-split i/d issues
Steven M. Schultz
sms at moe.2bsd.com
Thu Feb 18 11:25:53 AEST 1999
> From: allisonp at world.std.com (Allison J Parent)
> The F11 does not do I&D split but does have user/system.
Correct. Some systems also have an 18bit only MMU which restricts
memory to 248kb max (others have a 22bit MMU and can physically
have more memory).
> It's my understanding that 2.11 will run on F11 systems (pro350 and 11/23)
> if properly configured but the only binaries loose are for split I&D.
Not likely. The kernel won't fit in 48kb that I know of. And there
will be no networking support since that requires supervisor mode
which non-split I/D systems don't have.
> So if properly configured you can get 2.11 to utilize the user/system spaces.
The skeleton of a Makefile for non-split a kernel exists but it
will take much work (it is essentially just a list of file that may
or may not be 100% current) to kick into shape. Also, remember that
programs like 'csh', 'vi' and so on are not only split I/D but
overlaid - they will not run on a non-split machine.
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