Re: LINUX is obsolete Linux Inside
[Prev][Next][Index][Thread]

Re: LINUX is obsolete



 in article <12605@star.cs.vu.nl>, ast@cs.vu.nl (Andy Tanenbaum) says:
 
 > 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.
 
 The standard way of doing that is to trap on i/o space protection
 violations, and emulate the i/o for the user.
 -- 
 BURNS,JIM (returned student)
 Georgia Institute of Technology, 30178 Georgia Tech Station,
 Atlanta Georgia, 30332            | Internet: gt0178a@prism.gatech.edu
 uucp:	  ...!{decvax,hplabs,ncar,purdue,rutgers}!gatech!prism!gt0178a