Original from  Coridon Henshaw  to Denis Tonn on 04-29-1998
Original Subject: Adsl,Dhcp &Ddns
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  CH>>  Does OS/2 reprogram the PICs' priority settings?
 
  DT> You can't really change the PIC's priorities, they are determined by
  DT> the hardware wiring connected to the PIC(s).
 
CH> 8259 PIC functions 0xC0-0xC7: IRQ lowest prority.
CH> 
CH> Sets one IRQ to the lowest priority.  Commands 0xC0 through 
CH> 0xC7 relate to making IRQ 0 through 7 the lowest priority.  
CH> The action is summarized as follows.
CH> 
CH>         Priority (IRQ #)
CH> Command Loweset  Highest
CH> 0xC0    0 7 6 5 4 3 2 1
CH> 0xC1    1 0 7 6 5 4 3 2
CH> 0xC2    2 1 0 7 6 5 4 3
CH> 0xC3    3 2 1 0 7 6 5 4
CH> 0xC4    4 3 2 1 0 7 6 5
CH> 0xC5    5 4 3 2 1 0 7 6
CH> 0xC6    6 5 4 3 2 1 0 7
CH> 0xC7    7 6 5 4 3 2 1 0
 In that case, I have no idea.. I can take a look at the code involved
next time I get a chance, but I don't expect that to be soon.. 
   Denis       
 All opinions are my very own, IBM has no claim upon them
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