IBM PC CONVERTIBLE Technical Reference page 71

05A6 F6 06 0016 R 20
05AB 74 1A
,
; RELOAD
,
05AD
80 26 0016 R OF
05B2
IE
05B3
07
05B4 BF 0067 R
05B7 B4 19
05B9 B9 0004
05BC
05BC E8 0747
05BF AA
05CO FE C4
05C2 E2 F8
05C4 E9 0647
TEST
BIOS_STATUS,KYBD--ACTIVE ; HAS KEYBOARD BEEN ACTIVE?
JZ
RTCINL12 ; JUMP I F KEYBOARD NOT ACTIVE
INACTIVITY COUNTS FROM RTC RAM TO SYSTEM RAM
AND
BIOS_STATUS,NOT KYBD--ACTIVE ; RESET KBD ACTIVE FLAG
PUSH OS
; SET ES TO DATA
POP
ES
MOV DI,OFFSET DSP_BLANICCTR
MOV AH, RTCLCD_INACT
; START WITH LCD INACTIVITY COUNT
MOV
CX,4 ; TRANSFER 4 BYTES
RTCINL11:
CALL GELRTCNMI
STOSB
INC
LOOP
JMP
AH
RTCINL11
RTCINL14
STORE IN COUNTER SAVE AREA
GET NEXT BYTE
EXIT LEVEL
CHECK FOR DISKETTE MOTORS ON AND IF SO THEN RELOAD COUNT
05C7
RTCINL12:
05C7 BA 03F7
MOV DX,DRIVE_SENSE ; CHECK DISKETTE MOTOR STATUS
05CA EC
IN AL,DX ;
05CB A8 78
TEST AL, DRO_SELSENSE+DRLSEL_SENSE+DRO_MOT _SENSE +DRLMOT _SENSE
05CD 74 07
JZ RTCINL1L1 ; JUMP IF NOT
05CF 80 OE 0016 R 20
OR
JMP
BIOS_STATUS,KYBD--ACTIVE ; CAUSE RELOAD OF COUNTERS
0504 EB 71
SHORT RTCINL14 ; EXIT
CHECK DISPLAY BLANK COUNT
0506
RTCINL1L1:
0506 83 3E 0067 R 00 CMP DSP _BLANK_CTR, 0
05DB 74 06
0500 FF OE 0067
05El 74 36
05E3
05E3 83 3E 0069
05E8 74 50
05EA
FF OE 0069
05EE 74 46
05FO 83 3E 0069
05F5 75 50
;
05F7 E8 076E R
05FA E8 0759 R
05FD BB 003C
0600 B9 0081
0603 E8 0000
0606 B9 050A
0609 E2 FE
060B BB 0030
060E B9 00A1
0611 E8 0000
0614 E8 0762
0617 EB 2E
0619
0619 BO 00
061B E6 74
0610 E4 75
061F 24 BF
0621 E6 75
JE RTCINL13
DEC
JZ
DSP _BLANK_CTR
DSP _BLANK
CHECK SYSTEM POWER OFF COUNT
RTCINL13:
R 00 CMP SYS_OFFJTR,O
JE RTCINL14
DEC
SYS_OFF _CTR
JZ DEACLSYSTEM
IE CMP SYS_OFF_CTR,30
JNE RTCINL14
30 SECONDS TO POWER OFF SO RING ALARM
CALL NMLCYCLE
CALL SPKR_ON
MOV BX,60
MOV CX,129
CALL KB_NOISE
MOV CX,5*MS_DELAY
LOOP
$
MOV BX,48
MOV CX,161
CALL
KB_NOISE
CALL SPKR_RESTORE
JMP
SHORT RTCINL14
LCD/CRT MUST BE BLANKED
DSP _BLANK:
MOV AL,O
OUT
LCD_INDX,AL
IN
AL,LCD_DATA
AND
AL, NOT PANEL_ENABLE
OUT
LCD_DATA,AL
2-46 ROM BIOS
AT THE 30 SECOND MARK?
NO THEN EX IT
CYCLE NMI AND RESTORE INT FLAGS
TURN ON SPEAKER
TONE LENGTH (60 MSECS)
1/2 CYCLE FREQUENCY FOR 1KHZ TONE
SOUND BEEPER
DELAY BETWEEN SOUNDS
TONE LENGTH (60 MSECS)
1/2 CYCLE FREQ FOR 800 HZ TONE
SOUND BEEPER
RESTORE SPEAKER STATE
EXIT
TURN OFF PANEL