IRQs, inteerupts, and the 8259

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1 total messages Started by c3q Fri, 24 Jul 1992 00:54

#98

Author: c3q
Date: Fri, 24 Jul 1992 00:54

12 lines
689 bytes

For a given IRQ (n) either hard-wired or set on a board, the corresponding
interrupt is n+8.  The 8259 interrupt mask is 0..010..0 (8 bits) with the "1"
located in bit n.

EX:	IRQ: 3
	Int: # 0Bh = 11 decimal
	mask: 00001000b

For more information, see Ray Duncan's _Advanced MS-DOS Programming_
                      
- Travis J.I. Corcoran

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