IBM PC CONVERTIBLE Technical Reference page 52

0000 05 [
OOOA
OOOC
OOOE
0010
0012
0014
0016
0018
0000
08 [
0010 ??
DOll 1?
0012
=
0200
=
OOEC
=
OOEE
0000
0000 50
0001 BO 07
0003 E6 72
0005 53
0006 51
0007 52
0008 55
0009 56
OOOA 57
OOOB 06
OOOC IE
0000
0000 FC
OOOE
B8 ---- R
DOll 8E 08
0013 8B EC
0015 E4 62
0017 24 OF
0019 74 46
001B 8A 08
OOlD E4 61
001F DC 08
0021 E6 61
ENTRY CONDITIONS:
PURPOSE OF ENTRY: SERVICE NON-MASKIBLE INTERRUPT
INPUT CONDITIONS: NON-MASKIBLE INTERRUPT OCCURRED
RESTRICTIONS: NONE
INTERNALLY REFERENCED ROUTINES:
DSKLRESYNC KYBD_PREP KYBD_CLR
KYBD_XL T RTCALARM_NMI LOW_BAT _CHK
CHAN_CHK SUSPEND RESUME
EXTERNALL Y REFERENCED ROUTI NES: REFER TO EXTRN LIST
CHANGE ACTIVITY: NONE
**********************************************************************
????
1???
REGSAVE STRUC
OW 5 DUP(?)
DXSAVE OW
CXSAVE OW
BXSAVE OW
AXSAVE OW
OFFSAVE OW
SEGSAVE OW
FLGSAVE OW
REGSAVE ENDS
REGLSAV STRUC
OW 8 DUP(?)
ALSAVE DB
AHSAVE DB
REGLSAV ENDS
LFLAG
IrLINSTR
OULINSTR
EQU
EQU
EQU
0200H
OECH
OEEH
ASSUME DS:DATA,ES:NOTHING
NMLFLIH PROC FAR
OX SAVE AREA ON STACK
CX SAVE AREA ON STACK
BX SAVE AREA ON STACK
AX SAVE AREA ON STACK
OFFSET SAVE AREA ON STACK
SEGMENT SAVE AREA ON STACK
FLAGS SAVE AREA ON STACK
AL SAVE AREA ON STACK
AH SAVE AREA ON STACK
INTERRUPT FLAG IN FLAGS
REGISTER
OBJECT CODE FOR IN AL,DX INSTR
OBJECT CODE FOR OUT DX,AL INSTR
PUSH AX ; SAVE REGISTERS
MOV AL,DISABLLSLEEP+CLOCICRUN ; DISABLE NMIS
OUT CLOCICCTL, AL
PUSH BX
PUSH CX
PUSH OX
PUSH BP
PUSH SI
PUSH 01
PUSH ES
PUSH OS
NMLREDRIVE:
CLD
MOV
MOV
MOV
IN
AND
JZ
MOV
IN
OR
OUT
AX ,DATA
DS,AX
BP,SP
AL,NMLSRC
AL,NOT TIMERLSN
NMIH_OUT
BL,AL
AL,NMLCNTL
AL, 0 I S...ALARM
NMLCNTL,AL
CLEAR DIRECTION
SET BP TO STACK PTR
READ NMI SOURCE FLAGS
SAVE ALL BUT TIMER SENSE
BL
<---
NMI SOURCE FLAGS
DISABLE RTC ALARM· NMI
ROM BIOS 2-27