IBM PC CONVERTIBLE

OOBA B4 OE
MOV
AH,RTCDIALSTAT
ADDRESS AND
OOBC
E8 0000
CALL GELRTCNMI
GET RTCDIAG_STAT (RegE)
OOBF 24 7F
AND
AL,NOT RTCTIMLBAD
RESET RTCTIME_BAD FLAG (=0)
OOCl E8 0000 E
CALL
PULRTCNMI
PUT BACK RTCDIAG_STAT (RegE)
00C4 E9 0018 R
JMP TOD_NRET
NORMAL RTN AFTER SETTING TIME
; -------G E T
R T
C
D A T E---------
FUNCTION 04H ----------------
00C7
RTC4:
00C7
E8 01FE R
CALL
UPD_IN_PR
CLOCK OPERATING?
OOCA 73 03
JNC RTC4A
YES, GO AROUND
OOCC
E9 0026 R JMP TOD_ERET
NO, ERROR RETURN
OOCF
RTC4A:
OOCF B4 07
MOV AH,RTCMDAY ADDRESS AND
00D1 E8 0000 E
CALL GELRTCNMI
GET RTCMDAY (Reg?)
00D4 8A DO
MOV
DL,AL
DL RETURNS DAY OF MON. DATA
00D6
B4 08 MOV AH,RTCMON
ADDRESS AND
00D8
E8 0000 CALL GELRTCNMI
GET RTL...MON (Reg8)
OODB 8A FO
MOV DH,AL
DH RETURNS MONTH DATA
OODD B4 09
MOV
AH,RTCYEAR ADDRESS AND
OODF E8 0000
CALL GELRTCNMI
GET RTCYEAR (Reg9)
00E2 8A C8 MOV
CL,AL
CL RETURNS YEAR DATA
00E4
B4 32 MOV
AH, RTCCENTURY
ADDRESS AND
00E6
E8 0000 CALL
GELRTCNMI
GET RTCCENTURY (Reg50/32H)
00E9 8A E8
MOV
CH ,AL
CH RETURNS CENTURY DATA
OOEB E9 0018 R
JMP TOD_NRET
NORMAL RETURN WITH DATE
:-------CHECK FOR
FUNCTION REQUESTS 4,
5, AND 6----------------------
OOEE
RTCCHK2:
OOEE FE CC
DEC
AH I F PARAMETER AH=4
OOFO 74 D5
JZ
RTC4 THEN GET RTC DATE
00F2 FE CC
DEC
AH I F PARAMETER AH=5
00F4 74 07
JZ
RTC5 THEN SET RTC DATE
00F6 FE CC
DEC
AH I F PARAMETER AH=6
00F8 74 3B
JZ
RTC6 TH EN SET RTC ALARM
OOFA
EB 59 90
JMP RTCCHK3 GO CHECK FOR REMAINING
FUNCT
;-------S
E T
R T
C D A T E--------- FUNCTION 05H ----------------
OOFD
RTC5:
OOFD E8 01FE R
CALL UPD_IN_PR
CLOCK OPERATING?
0100 73 03
JNC
RTC5A YES, GO AROUND
0102 E8 01E5 R
CALL IN ITIALI ZE_STATUS
NO, INIT CONTROL/STATUS
REG.S (A-D)
0105
RTC5A:
0105
B4 06
MOV AH,RTCWDAY ADDRESS AND
0107
BO 00 MOV
AL,O CLEAR
0109 E8 0000
CALL
PULRTCNMI RTCWDAY (Reg6)
OlOC B4 07
MOV
AH,RTCMDAY ADDRESS AND SET
OlOE 8A C2
MOV
AL,DL RTCMDAY (Reg?) = TO
0110 E8 0000
CALL PULRTCNMI DAY OF MON. PARAMETER,
DL
0113
B4 08
MOV
AH, RTC...MON ADDRESS AND SET
0115 8A C6 MOV
AL,DH RTC...MON (Reg8) = TO
0117
E8 0000 CALL
PULRTCNMI MONTH PARAMETER, DH
OllA
B4 09 MOV
AH,RTCYEAR ADDRESS AND SET
OllC 8A Cl MOV
AL,CL RTC YEAR (Reg9) = TO
OllE E8 0000 E
CALL PULRTCNMI
YEAR PARAMETER, CL
0121 B4 OB MOV
AH,RTCMODE ADDRESS AND
0123
E8 0000 CALL
GELRTCNMI GET RTCMODE (RegB)
0126 24 7F
AND AL,NOT SELCLOCK
TURN OFF SET -MODE ONLY
0128
E8 0000 CALL PULRTCNMI
ADDR AND SET RTC...MODE (RegB)
012B B4 32
MOV AH, RTCCENTURY
ADDRESS AND SET
012D 8A C5 MOV
AL,CH RTCCENTURY (Reg50/32H) = TO
012F E8 0000
CALL PULRTCNMI CENTURY PARAMETER, CH
2-158 ROM BIOS