On Monday April 27 1998 at 12:09, Denis Tonn wrote to Coridon Henshaw:
 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).
8259 PIC functions 0xC0-0xC7: IRQ lowest prority.
Sets one IRQ to the lowest priority.  Commands 0xC0 through 0xC7 relate to 
making IRQ 0 through 7 the lowest priority.  The action is summarized as 
follows.
        Priority (IRQ #)
Command Loweset  Highest
0xC0    0 7 6 5 4 3 2 1
0xC1    1 0 7 6 5 4 3 2
0xC2    2 1 0 7 6 5 4 3
0xC3    3 2 1 0 7 6 5 4
0xC4    4 3 2 1 0 7 6 5
0xC5    5 4 3 2 1 0 7 6
0xC6    6 5 4 3 2 1 0 7
0xC7    7 6 5 4 3 2 1 0
Source: The Undocumented PC by Frank van Gilluwe, published by Addison-Wesley 
(1994).  ISBN 0-201-62277-7.
--- GoldED/2 2.50+
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