1 files changed, 66 insertions, 0 deletions

diff --git a/private/ntos/nthals/halx86/i386/ixcmos.inc b/private/ntos/nthals/halx86/i386/ixcmos.inc
new file mode 100644
index 000000000..1f78de8e7
--- /dev/null
+++ b/private/ntos/nthals/halx86/i386/ixcmos.inc
@@ -0,0 +1,66 @@
+;/*
+;++
+;
+;   Copyright (c) 1989  Microsoft Corporation
+;
+;   Module Name:
+;
+;       ixcmos.inc
+;
+;   Abstract:
+;
+;       This module contains common definitions used by the CMOS.
+;
+;   Author:
+;
+;       Landy Wang (corollary!landy) 04-Dec-1992
+;
+;               (Moved from ixclock.asm)
+;
+;--
+
+;
+;	_HalpAcquireCmosSpinLock and _HalpReleaseCmosSpinLock
+;	must be called before accessing the CMOS in both uniprocessor
+;	and multiprocessor systems.
+
+RTCIRQ                  EQU     8       ; IRQ number for RTC interrupt
+CMOS_CONTROL_PORT       EQU     70h     ; command port for cmos
+CMOS_DATA_PORT          EQU     71h     ; cmos data port
+
+;
+; CMOS_READ
+;
+; Description: This macro reads a byte from the CMOS register specified
+;        in (AL).
+;
+; Parameter: (AL) = address/register to read
+; Returns: (AL) = data
+;
+
+CMOS_READ       MACRO
+        OUT     CMOS_CONTROL_PORT,al    ; ADDRESS LOCATION AND DISABLE NMI
+        IODelay                         ; I/O DELAY
+        IN      AL,CMOS_DATA_PORT       ; READ IN REQUESTED CMOS DATA
+        IODelay                         ; I/O DELAY
+ENDM
+
+;
+; CMOS_WRITE
+;
+; Description: This macro reads a byte from the CMOS register specified
+;        in (AL).
+;
+; Parameter: (AL) = address/register to read
+;            (AH) = data to be written
+;
+; Return: None
+;
+
+CMOS_WRITE      MACRO
+        OUT     CMOS_CONTROL_PORT,al    ; ADDRESS LOCATION AND DISABLE NMI
+        IODelay                         ; I/O DELAY
+        MOV     AL,AH                   ; (AL) = DATA
+        OUT     CMOS_DATA_PORT,AL       ; PLACE IN REQUESTED CMOS LOCATION
+        IODelay                         ; I/O DELAY
+ENDM