IBM PC CONVERTIBLE - Page 244

Error Message Routine (SYS_CHK)
OB3D
OB3D
40 73
OB3F
20 71
OB41 10 75
0843
0843
B4 OE
0845
E8 07AA R
0848
B9 0003
OB4B BE 0830 R
084E
084E
2E: 84 04
0851 75 OA
OB53 83 C6 02
0856 E2 F6
0858 2B CO
085A EB 00 90
0850
0850
2E: 8B lC
0860
32 C3
0862 E8 07C8 R
0865 B4 50
0867 8A C7
; SET ERROR CODE
0869
0869
C3
086A
*********************************************************************
ROUTINE-NAME: SYS_CHK
FUNCT ION: TH I S ROUTI NE DSPL YS ERROR MESSAGES ACCORD I NG TO FLAGS SET
IN THE RTCDIAG_STAT SAVE AREA. ONCE THE FLAG HAS BEEN FOUND
IT IS CLEARED IF AN ASSOCIATED ERROR CODE IS PRESENT.
ENTRY CONDITIONS:
PURPOSE OF ENTRY:
INPUT CONDITIONS:
RESTRICTIONS:
EXIT CONDITIONS:
DISPLAY ERROR MESSAGES
DS:DATA
NONE
NORMAL EX IT CONDITIONS: RETURN
ERROR EXIT CONDITIONS: NON FATAL ERROR RETURN CODE WITH ERROR CODE
I F ASSOCIATED BIT SET. RE_DISPATCH FLAG SET
IF ALL BITS IN RTCDIAG_STAT NOT YET CHECKED.
REGISTERS MODIFIED:
AX, BX, CX, OX
*********************************************************************
ERROR_TABLE LABEL WORD
DB BAD_RTCSIG,73H
DB BAD_STORJKSUM, 7lH
DB LCD-ALLFAILED,75H
RTC SIGNATURE BAD
STG CHECKSUM BAD ON RESUME
ALTERNATE LCD MODE FAILED
SYS_CHK PROC NEAR
MOV AH,RTCDIAG_STAT
CALL GELRTCREG
MOV CX,3 ; THREE
ENTRI ES IN TABLE
MOV SI,OFFSET ERROR_TABLE
SYS_LP:
TEST
JNZ
ADD
LOOP
SUB
JMP
AL, BYTE
SYS_ERR
SI,2
SYS_LP
AX,AX
SYS_EXIT
PTR CS: [SI] ; CHECK FOR BIT ON
; CLEAR ERROR CODE
ERROR MATCH FOUND SO CHECK FOR ERROR CODE
SYS_ERR:
FROM TABLE
MOV
XOR
CALL
MOV
MOV
SYS_EXIT:
BX,WORD PTR CS: [SI] ; GET CODE FROM TABLE
AL, BL ; RESET ERROR BIT
PULRTCREG ; SAVE IN RTCDIAG STAT
AH,NON_FATAL_ERR+RE_DISPATCH ; SET ERR AND REDISP
AL, BH
RET
SYS_CHK ENDP
ROM BIOS 2-219