Resume (Resume) - IBM PC CONVERTIBLE Technical Reference

SAVE NMI AND SPEAKER CONTROL REGISTER
08E9 E4 61 IN AL,NMLCNTL
08EB AA STOSB
08EC BO 00 MOV AL,O
08EE E6 61 OUT NMLCNTL ,AL
; DISABLE SPEAKER
SAVE COMMUNICAYTIONS CONTROLLER(S) CURRENT STATE
08FO B3 01 MOV BL ,01
; SET SUSPEND PARAMETER FOR
08F2 E8 OB04 CALL ASYNCSUSPEND
; SAVING ASYNC DEVICES
CHECKSUM LOWER 128K OF STORAGE
08F5 2B DB
SUB BX, BX
SET ACCUMULATOR
08F7 BE 053A MOV SI,53AH
STARTING OFFSET
08FA
B9 7063 MOV CX,7D63H CHECKSUM 32K WORDS
08FD SUS_OlO :
08FD AD LODSW
08FE 03 08 ADD BX,AX
0900 E2 FB LOOP SUS_OlO
0902 B9 8000 MOV CX ,8000H
CHECKSUM NEXT 32K WORDS
0905 8C 08 MOV AX,DS
0907 80 C4 10 ADD AH,10H
OFFSET TO NEXT SEGMENT
090A
8E 08
MOV DS,AX
090C SUS_Oll :
090C AD LODSW
0900 03 08
ADD
BX,AX
090F E2 FB LOOP SUS_Oll
CANNOT USE SYSTEM STACK FROM HERE ON
09ll BO 23 MOV AL, RTCBMEMJKSL ADDRESS CHECKSUM LOW SAVE AREA
0913 E6 70 OUT RTCR_PORT, AL OUTPUT ADDRESS
0915 8A C3 MOV AL, BL
0917 E6 71 OUT RTCD_PORT ,AL OUTPUT DATA
0919 BO 24 MOV AL, RTCBMEM_CKSH
ADDRESS CHECKSUM HI SAVE AREA
091B E6 70 OUT
RTCR_PORT, AL
OUTPUT ADDRESS
0910 8A C7 MOV AL, BH
091F E6 71
OUT RTCD_PORT, AL OUTPUT DATA
SET SUSPEND FLAG
ASSUME
DS:DATA
0921
B8 ----
MOV AX, DATA
; SET OS BACK TO DATA AREA
0924 8E 08 MOV DS,AX
On6
C7 06 0072 R 5678 MOV RESELFLAG,SYS_SUSPEND ; SET SUSPEND SUCCESSFUL
onc
SUSP _HL T:
onc
BO 00 MOV AL, CLOCLSTOP ; STOP SYSTEM CLOCKS
OnE E6 72 OUT CLOCLCTL, AL
0930 EB FA JMP
SUSP _HL T
0932 SUSPEND ENDP
Resume (RESUME)
0932
0932 E8 0000 E
0935 B4 20
0937 E8 0747 R
SUBTTL RESUME SYSTEM STATE
****************************************************************
RESUME: SUBROUTINE TO RESTORE SYSTEM FOR APPLICATION RESUME
****************************************************************
RESUME
ASSUME
CALL
MOV
CALL
PROC NEAR
OS: DATA
DISABLE_NMI
AH, RTCDSP _CON
GELRTCNMI
DISABLE ALL INTERRUPTS
GET LCD TYPE
ROM BIOS 2-55