[comp.os.minix] IBM != IBM

ast@cs.vu.nl (Andy Tanenbaum) (03/21/90)

Various people have reported that 1.5.5 won't boot on a 6 MHZ IBM AT.
Apparently IBM is not IBM compatible.  It used to work.  Does anyone 
have any more experience, ideas etc?

Andy Tanenbaum (ast@cs.vu.nl)

abrams@cs.columbia.edu (Steven Abrams) (03/26/90)

In article <6062@star.cs.vu.nl> ast@cs.vu.nl (Andy Tanenbaum) writes:
   Various people have reported that 1.5.5 won't boot on a 6 MHZ IBM AT.
   Apparently IBM is not IBM compatible.  It used to work.  Does anyone 
   have any more experience, ideas etc?

   Andy Tanenbaum (ast@cs.vu.nl)

I was one of those people.  The problem is somewhere in the protected
mode code, I'd bet.  1.5.5 will boot an original IBM AT with the
bios_wini.c driver running in real mode.  If I get the chance, I'll
make up a version with at_wini.c to run in real mode and see what
happens.  


~~~Steve
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 *Steven Abrams             abrams@cs.columbia.edu
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