Hello Darryl,
Darryl Gregorash wrote to Jan Wagemakers :
 JW>> Because the following has worked with only MSDOS Himem.sys loaded.
 JW>> /* mov     ax,0 mov     ds,ax       ;DS = mov     word ptr
 JW>> [ds:0b8142h],8403h
 DG> Out of idle curiosity, what happens if you try this without himem.sys
 DG> loaded?
The computer locks up. The only thing you can do is pressing the
reset-button ;-)
Regards                                - Jan Wagemakers - 
 
o_o You don't have to sleep to see nightmares.                     (Anne 
Clark) 
--- Terminate 5.00/Pro /Linux.DosEmu.JanW-DOS(PTS)
---------------