IBM PC CONVERTIBLE Technical Reference page 236

083B F3/ AA REP STOSB
0830 A2 0096 R MOV KLFLAG_3 ,AL ; CLEAR ADDITIONAL FLAGS
0840 89 3E 0082 R MOV BUFFEILEND,DI
; SET UP BUFFER_END ADDR
,
; SETUP UP DEFAULT KEYBOARD BUFFER POINTERS
;
0844 BE OOlE R MOV SI,OFFSET KB_BUFFER ; SETUP KEYBOARD PARAMETERS
0847 89 36 OOlA R MOV BU FFER_H EAD, S I
084B
89 36 OOlC R MOV
BUFFER_TAIL,SI
084F 89 36 0080 R MOV BUFFER_START ,SI
0853 BF 00B4 R
0856 B9 0019
0859 F3/ AA
085B C3
085C
INITIALIZE KEYBOARD NMI CONTROL AREA AND BUFFER (KB-AREA2)
MOV
MOV
REP
RET
DI,OFFSET KB-AREA2
CX, KB-AREALLNG
STOSB
KYBD_RESET ENDP
Set Data Segment (DDS)
085C
085C 50
0850 B8 R
0860 8E 08
0862 58
0863 C3
0864
; *********************************************************************
ROUTINE-NAME: DDS
FUNCTION: SET DATA SEGMENT (OS) TO BIOS DATA AREA
ENTRY CONDITIONS:
INPUT CONDITIONS: NONE
RESTRI CTIONS: NONE
EXIT CONDITIONS: OS
=
SET TO BIOS DATA SEGMENT
REGISTERS MODI FlED: OS
; *********************************************************************
DDS PROC NEAR
PUSH AX
SAVE AX
MOV AX,DATA
MOV DS,AX
SET SEGMENT
POP AX RESTORE AX
RET
DDS ENDP
Calculate Absolute Vector Offset
(GET _ VECTOR@)
0864
0864 50
0865 2A E4
0867 E4 72
0869 24 BF
086B E6 72
0860 E4 63
**************************************************
ROUTINE: GELVECTOR@
FUNCTION: CALCULATE ABSOLUTE VECTOR OFFSET OF
HARDWARE INTERRUPT LEVELS.
INPUT: CL = HARDWARE INTERRUPT LEVEL # 0-7
OUTPUT: SI = ABSOLUTE OFFSET ADDRESS OF VECTOR
REGISTERS MODIFIED: SI
***************************************************
GELVECTOR@ PROC NEAR
PUSH AX
SUB AH,AH
IN AL,CLOCLCTL
AND AL,OBFH
OUT CLOCLCTL,AL
IN AL,63H
SET READ INTERRUPT REG 0
READ CURRENT I RPT TYPE BITS
ROM BIOS 2-211