Re: LINUX is obsolete
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Re: LINUX is obsolete
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Subject: Re: LINUX is obsolete
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From: ast@cs.vu.nl (Andy Tanenbaum)
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Date: 29 Jan 92 18:03:01 GMT
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Newsgroups: comp.os.minix
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Organization: Fac. Wiskunde & Informatica, Vrije Universiteit, Amsterdam
In article <1992Jan29.141212.29636@epas.toronto.edu> meggin@epas.utoronto.ca (David Megginson) writes:
>
>Why does the
>Intel architecture _not_ allow drivers to be independent programs?
The drivers have to read and write the device registers in I/O space, and
this cannot be done in user mode on the 286 and 386. If it were possible
to do I/O in a protected way in user space, all the I/O tasks could have
been user programs, like FS and MM.
Andy Tanenbaum (ast@cs.vu.nl)