IBM PC CONVERTIBLE Technical Reference page 241

ERROR EXIT CONDITIONS: NONE
REGISTERS MODIFIED: ES,SI,DI,AX,CX
*********************************************************************
OAOC
OAOC IE
OAOD B9 OOIF
OAIO 2B FF
OAl2 8E C7
OAl4
OAl4 B8 I F23 R
OAl7 83 FF 40
OA1A 74 05
OA1C 83 FF 74
OA1F 75 05
OA21
OA21 83 C7 04
OA24 E2 EE
OA26
OA26 AB
OA27 8C C8
OA29 AB
OA2A E2 E8
OA2C B9 0017
OA2 FOE
OA30 1 F
OA31 BE 1EF3
OA34 BF 0020
OA37
OA37 83 FF 40
OA3A 74 05
OA3C 83 FF 74
OA3F 75 08
OM1
OM1 83 C7 04
OM4 83 C6 02
OM7 E2 EE
0A49
0A49 A5
OMA 83 C7 02
OMD E2 E8
OMF 1 F
VECTOR_SETUP PROC NEAR
ASSUME DS:DATA,ES:ABSO
PUSH
MOV
SUB
MOV
OS
CX,31
01,01
ES,DI
SAVE OS
FILL ALL 31 INTERRUPTS
FIRST INTERRUPT LOCATION
SET ES=ABSO
INITIALIZE FIRST 31 VECTORS TO 011 (TEMPORARY INTERRUPT HANDLER)
VECTORS 0-lEH SET TO 011
SETUP _1:
MOV AX,OFFSET 011
cr~p
01, 10H*4
JE SETUP _lA
CMP 01, 1DH*4
JNE SETUP_1B
SETUP _lA:
ADD 01,4
LOOP SETUP_1
SETUP_IB:
STOSW
MOV AX,CS
STOSW
LOOP SETUP_1
MOVE ADDR OF INTR PROC TO TBL
VIDEO INT 10H?
YES THEN SKIP
VIDEO INT IDH?
YES THEN SKIP
SKI P VECTORS
SET VECTORS
GET ADDR OF INTR PROC SEG
-INITIALIZE BIOS VECTORS 8-1EH FROM VECTOR_TABLE
SKIPPING VIDEO VECTORS 10H AND IDH
MOV
PUSH
POP
MOV
MOV
SETUP_2:
CMP
JE
CMP
JNE
SETUP_2A:
ADD
ADD
LOOP
SETUP_2B:
MOVSW
ADD
LOOP
POP
CX ,23 ; GET VECTOR COUNT
CS ; SETUP OS SEG REG
OS
SI,OFFSET VECTOR_TABLE
DI,OFFSET INLPTR
DI,10H*4
SETUP _2A
DI,lDH*4
SETUP _2B
01,4
SI,2
SETUP _2
01,2
SETUP _2
OS
VIDEO INT lOH?
YES THEN SKIP
VIDEO INT 1DH?
YES THEN SKIP
SKIP VIDEO VECTORS
SET VECTORS
SKI P OVER SEGMENT
RESTORE OS
SET UP NMI,PRINT SCREEN, BASIC SEGMENT, RESUME VECTOR, AND
USER REAL TIME CLOCK ALARM VECTORS
OA50 26: C7 06 0008 R MOV NMLPTR,OFFSET NMLFLIH ; NMI INTERRUPT HANDLER
INT5_PTR,OFFSET PRINLSCREEN ; PRINT SCREEN
0000 E
OA57 26: C7 06 0014 MOV
1 F54 R
OA5E 26: C7 06 0062 MOV
BASICPTR+2,OF600H ; SEGMENT FOR RESIDENT BASIC
F600
ASSUME ES:DATA,DS:DATA
2-216 ROM BIOS