PERFORCE change 42357 for review

[Peter Wemm]

http://perforce.freebsd.org/chv.cgi?CH=42357

Change 42357 by peter at peter_daintree on 2003/11/14 11:05:42

	Update comments (from i386)

Affected files ...

.. //depot/projects/hammer/sys/amd64/isa/icu.h#10 edit

Differences ...

==== //depot/projects/hammer/sys/amd64/isa/icu.h#10 (text+ko) ====

@@ -107,9 +107,9 @@
 #define	OCW2_R		0x80		/* EOI mode */
 
 /* Operation control word type 3.  Bit 3 (0x08) must be set. Even address. */
-#define	OCW3_RIS	0x01
-#define	OCW3_RR		0x02
-#define	OCW3_P		0x04
+#define	OCW3_RIS	0x01		/* 1 = read IS, 0 = read IR */
+#define	OCW3_RR		0x02		/* register read */
+#define	OCW3_P		0x04		/* poll mode command */
 /* 0x08 must be 1 to select OCW3 vs OCW2 */
 #define	OCW3_SEL	0x08		/* must be 1 */
 /* 0x10 must be 0 to select OCW3 vs ICW1 */