IBM PC CONVERTIBLE Technical Reference page 81

093A BB BICO MOV
BX, SUSPENDJ10NO
; DEFAULT TO LCD AS MONO
093D BA 03B4
MOV DX, MONO_CNTL-4
SET RESUME MODE ACCORDING TO DISPLAY CONFIGURATION
0940 A8 06 TEST AL, DSP _MLCD+DSP _CGA
I F LCD AS MONO OR CGA I NSTALL ED
0942 75 06
JNZ RES_DOl
JMP - RESUME IN MONO MODE
0944
BB B9CO MOV
BX, SUSPEND_COLOR LCD MUST BE COLOR
0947 BA 03D4 MOV DX, CGA_CNTL-4
094A RES_DOl:
094A 8E DB MOV DS, BX
GET SAVE AREA SEGMENT
094C
BE 0007 MOV
SI,7 RETRIEVE LCD INFO
ACCESS LCD FONT AREA WHERE SYSTEM SUSPEND SAVE AREA IS LOCATED
094F BO 00
MOV
AL, LCD_FUNCT
0951 E6 74
OUT
LCD_INDX,AL
; SELECT LCD REG 0
0953 BO 18 MOV
AL, LCD_ENAB+LCD_FONT ; SET ENABLE WITH FONT ACCESS
0955 81 FA 03B4
CMP DX ,MONO_CNTL-4 IS LCD SET IN MONO MODE?
0959 74 02
JE
RES_OOIA
JUMP I F YES
095B DC 02 OR AL, LCD_CGA
NO, USE LCDC AS CGA
095D RES_OOlA:
095D E6 75
OUT
LCD_DATA,AL
SET LCD MODE FOR RESUME
RESTORE LCD CONTROL REGISTERS
;
095F BF 0783 R
MOV DI,OFFSET LCDR_TABLE ; POINT TO LCD REG TABLE
0962 B9 0014 MOV CX, LCDR_L ENGTH
GET LENGTH OF TABLE
0965 RES_002 :
0965 2E: 8A 05 MOV AL,CS: [DI]
; GET REGISTER ADDRESS
0968 47 INC DI
0969 EE OUT DX,AL
OUTPUT REG NUMBER
096A
42 INC DX
GET DATA PORT
096B AC LODSB
RETRIEVE REGISTER VALUE
096C
EE OUT DX,AL
0960 4A
DEC DX
SET DX BACK TO INDEX PORT
096E
E2 F5
LOOP RES_002
RESTORE SYSTEM TIMERS
0970 AC LODSB
GET TIMER 0 MODE
0971
24 3F AND AL,3FH TURN OFF UPPER TWO BITS
0973 8A EO MOV AH,AL
AH HAS TIMER 0 MODE
0975 E6 43 OUT
TIMERJTL ,AL WRITE TIMER 0 MODE
0977 AC
LODSB
0978 8A D8 MOV BL,AL BL HAS TIMER 0 LSB
097A AC
LODSB
097B 8A C8 MOV
CL,AL CL HAS TIMER 2 LSB
097D AC LODSB
097E 8A FO MOV
DH,AL DH HAS TIMER 2 MODE
0980 AC LODSB
0981
8A F8
MOV BH,AL BH HAS TIMER 0 MSB
0983 AC LODSB
0984 8A E8
MOV CH,AL CH HAS TIMER 2 MSB
WRITE TIMER 0 COUNTER
0986 80 E4 30 AND AH,30H
SAVE ONLY READ/WRITE TYPE
0989 80 FC 10
CMP AH,lOH IS IT LSB ONLY?
098C 74 OF
JE RES_003
098E 80 FC 20
CMP AH,20H
IS IT MSB ONLY?
0991 74 10 JE RES_004
0993 8A C3
MOV AL, BL OUT LSB FI RST THEN MSB
0995 E6 40 OUT TIMERO,AL
0997 8A C7
MOV AL,BH
0999 E6 40
OUT TIMERO,AL
099B EB OA JMP SHORT RES_005
0990 RES_003 :
0990 8A C3
MOV AL,BL WRITE LSB ONLY
099F E6 40
OUT TIMERO,AL
2-56 ROM BIOS