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define offsets into "register window" instead of absolute ISA addresses 

for better use in a bus-ified environment
This commit is contained in:
drochner 1998-01-19 11:38:00 +00:00
parent da2013ac86
commit 94343e637a
1 changed files with 5 additions and 5 deletions
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10
sys/dev/ic/i8253reg.h
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@ -1,4 +1,4 @@
/* $NetBSD: i8253reg.h,v 1.4 1994/10/27 04:18:17 cgd Exp $ */
/* $NetBSD: i8253reg.h,v 1.5 1998/01/19 11:38:00 drochner Exp $ */
/*-
* Copyright (c) 1993 The Regents of the University of California.
@ -79,10 +79,10 @@
/*
* Macros for specifying values to be written into a mode register.
*/
#define TIMER_CNTR0 (IO_TIMER1 + 0) /* timer 0 counter port */
#define TIMER_CNTR1 (IO_TIMER1 + 1) /* timer 1 counter port */
#define TIMER_CNTR2 (IO_TIMER1 + 2) /* timer 2 counter port */
#define TIMER_MODE (IO_TIMER1 + 3) /* timer mode port */
#define TIMER_CNTR0 0 /* timer 0 counter port */
#define TIMER_CNTR1 1 /* timer 1 counter port */
#define TIMER_CNTR2 2 /* timer 2 counter port */
#define TIMER_MODE 3 /* timer mode port */
#define TIMER_SEL0 0x00 /* select counter 0 */
#define TIMER_SEL1 0x40 /* select counter 1 */
#define TIMER_SEL2 0x80 /* select counter 2 */