IBM 5170 Technical Reference page 229

TITLE SIDT_I3LD 6/10/83 PROTECTED MODE INTERRUPT TABLE
SIOT_BLD Include fi les
INCLUDE SYSOATA.INC
INCLUDE ACCESS. INC
INCLUDE SYSOATA.MAC
I NGLUDE I APX286. MAC
.l15T
I NCLUDE SEGMENT. SRC
r---..,
0000 CODE SEGMENT BYTE PUBU C
ASSUME CS: CODE
ASSUME S5: NOTH I NG
ASSUME OS; NOTH I NG
ASSUME ES: NOTH I NG
PUBLIC SlOT BLO
0000 5 I OT_IJLD PROC NEAR ­
BUILD TilE lOT. THE lOT WILL CONTAIN VECTORS FOR
EXCEPTION HANDLERS
0000
BE 0066 R MOV Sl,OfFSET SYS lOT OFFSETS ; MAKE DS;SI POINT TO
0003
Be
G8 MOV
AX, CS - - I NT ERRU PT ENTRY PO I NTS
0005
0007
8E 08
BF DOAD
MOV
MOV
OS,AX
OI,SYS_IOT_LOC POINT TO SYS_IDT_LOC
DODA
Dooe
28 CO
8E
co
SUB
MOV
AX,AX
ES,AX WHERE THE lOT WILL BE.
OOOE
0011
BS 0040
B6 87
MOV
MOV
ex,
SYS_ROM_CS
DH, TRAP GATE
CS I S THE SAME FOR ALL I NTERRU PTS
ACCESS RIGHTS BYTE FOR THE GATE
0013 B2 00 MOV
OL,D
THE WORD COUNT FIELD IS UNUSED
0015 B9 0020 MOV CX,32 THERE ARE 32 RESERVED INTERRUPTS
0018
LOW_ lOT: THIS LOOP BUILDS 32 DESCRIPTORS IN THE
lOT FOR THE RESERVED INTERRUPTS
0018
A5 MOVSW GET A ROUT I NE ENTRY PO I NT
AND PUT I TIN THE OFFSET FIELD
0019
0018
88 C3
AB
MOV
STOSW
AX,
ex
GET THE SYSTEM CODE SEGMENT SELECTOR
AND PUT I TIN THE SELECTOR FIELD
OOlC
88 C2 MOV
AX, OX
GET THE
I
NTERRUPT GATE BYTE
~OlE AB STOSW AND PUT IT IN THE ACCESS RIGHTS FIELD
DOlF
0022
B8 DODO
AB
MOV
STOSW
AX,O ZERO OUT
THE RESERVED POST I T IONS
0023 £2 F3. LOOP LOW_lOT AND REPEAT AS 0 I RECTED
0025
0028
B9 ODED
so
OOA6 R
MOV
MOV
CX,256-32
SP,OFFSET FREE_INTS
256 TOTAL - 32
DONE =
WHATEVER I S LEfT
THERE IS A COPY OF AN UNINITIALIZEO
I NTERRU PT DESCR
I
PTOR AT FREe
I
NTS
PAGE
0028
HIGH lOT:
~
0028 8B f5 MOV S I, BP DS:SI
-->
FREE DESCRIPTOR
(ES:DI LEfT OFF AT INT 32)
0020
A5 MOVSW
MOVE THE OFFSET OF THE IRET INSTRUCTION
002E
A5 MOVSW MOVE THE CS SELECTOR
GOZf A, MOVSW MOVE THE ACCESS RIGHTS BYTE
0030 AB STOSW ZERO OUT THE RESERVED WORD
0031 £2 F8
LOOP
FILL THE REMAINDER OF THE TABLE
INITIALIZE THE ENTRY POINTS rOR POST TEST
0033 26:
C7 06 D1AO 0000 E
MOV WORD PTR ES: (SYS_I DT_LOC+( 032*DESC_LEN) ENTRY_PO I NT), OFFSET SYS_32
D03A
26: C7 06 alAS 0000 E
MOV WORD PTR ES; ( SYS_' OT_LOC+( 033*DESC_LEN I. ENTRY_PO
HH
I, OFFSET SYS_33
0041
26: C7 06 D1 BO 0000 E
MOV WORD PTR ES:(SYS_IOT_LOC+(034*DESC_LENI.ENTRY_POINT),OFFSET SYS_34
0048
26: C7 06 01 B8 0000 E
MaY WORD PTR ES: ( SYS_ I DT _LOC+( 035*DESC_LEN) • ENTRY_PO I NT), OFFSET SYS_35
004F 26; C7 06 01 CO 0000 E
MOV WORD PTR ES: (SYS_I DT_LOC+( 036*DESC_LEN). ENTRY_POI NTI.OFFSET SYS_36
0056 26: G7 06 Dl G8 0000 E
MOV WORD PTR ES: (SYS_I DT_LOC+( 037*DESC_LEN). ENTRY_PO I NT I, OFFSET SYS_37
0050 26: C7 06 Dl DO 0000 E
MOV WORD PTR ES: ( SYS_I DT_LDC+( 038*DESC_LEN) • ENTRY_PO I NT), OF fSET SYS_38
0064
C3 RET
PAGE
0065 I RET_ADOR LABEl WORD FOR UNIN1TlAliZED INTERRUPTS
0065
CF I RET
EXTRNS FOR THE fIRST 32 SYSTEM 1NTERRUPTS
EXTRN EXC 00 NEAR
EXTRN EXC-Ol NEAR
EXTRN EXC-02 NEAR
EXTRN EXC-03 NEAR
EXTRN EXC=04 NEAR
EXTRN EXC 05 NEAR
EXTRN EXC-06 NEAR
EXTRN EXC-07 NEAR
EXTRN EXC=08 NEAR
EXTRN EXC_09 NEAR
EXTRN EXC_10 NEAR
EXTRN EXC 11 NEAR
EXTRN EXC::::12 NEAR
EXTRN EXC 13 NEAR
EXTRN EXC-14 NEAR
EXTRN EXC-'5 NEAR
EXTRN EXC-'6 NEAR
EXTRN EXC-'7 NEAR
EXTRN EXC-18 NEAR
EXTRN EXC-' 9 NEAR
EXTRN EXC:::::20 NEAR
EXTRN EXC 21 NEAR
EXTRN EXC-22 NEAR
EXTRN EXC-23 NEAR
EXTRN EXC-24 NEAR
EXTRN EXC-25 NEAR
EXTRN EXC-26 NEAR
EXTRN EXC=27 NEAR
SIDT.JJLD
5-87