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From: ARMENGAU@FRECP12.BITNET (Joel Armengaud)
Newsgroups: comp.sys.ibm.pc.programmer
Subject: Re: LOADALL instruction
Message-ID: <90128.164353ARMENGAU@FRECP12.BITNET>
Date: 8 May 90 20:43:53 GMT
Lines: 12
Organisation: ECP-Paris France

Just a few words about LOADALL:

   It's used by programs like SMARTDRIVE to access memory above 1Mb
on 80286 processors. Unfortunately, the problem with loadall is that
an interrupt resets the "invalid" cache descriptors: so you have
2 alternatives: keep interrupts disabled (not recommended for a long
period), or reissue a LOADALL whenever an interrupt occurs. This can be done
in a tricky way like in Himem or Smartdrv (sources of Himem are available on
Simtel20). However I don't think it would be realistic to execute a program
above 1Mb in real mode... So on the whole LOADALL is not very usefull.

   -Joel Armengaud