icu.h,v

来自「TCP-IP红宝书源代码」· H,V 代码 · 共 47 行

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date	97.09.21.19.26.19;	author dls;	state Dist;
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date	94.04.30.04.05.15;	author dls;	state Works;
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@pre-3e code
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@/* icu.h */

#define	ICU1	0x20		/* I/O port address, 8259A #1		*/
#define	ICU2	0xA0		/* I/O port address, 8258A #2		*/

#define	OCR	ICU1		/* Operation Command Register		*/
#define	IMR	(ICU1+1)	/* Interrupt Mask Register		*/

#define	EOI	0x20		/* non-specific end of interrupt	*/
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@Initial revision
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