IBM PC CONVERTIBLE Technical Reference page 94

0083 F9
0084 CD 15
0086 73 60
0088 8A EO
STC
INT
JNC
MOV AH,AL
PRE SET CARRY FOR INTERCEPT CHECK
IF NO CARRY THEN VECTOR INTERCEPT
ELSE PROCESS KEY HERE:
SAVE SCAN CODE IN AH ALSO
KEYPAD /,
*
MAKES
008A F6 06 009 R 02
008F 74 21
0091 80 36 0096 R 02
0096 80 FC 35
0099 74 05
0098 80 FC 37
009E 75 12
OOAO
OOAO F6 06 0018 R 08
00A5 75 03
00A7
E9 0320 R
OOAA
80 26 0018 R F7
OOAF E9 0396 R
TEST
JZ
XOR
CMP
JE
CMP
JNE
K6_1:
TEST
JNZ
JMP
K6_5:
JMP
KB_FLAL3, LCHC
K9_1
KB_FLAL3, LCHC
AH, P60_SLASH_SC
K6_1
AH, P60J.STRICSC
K9_1
HAS AN EOH 8EEN PROCESSED?
NO, JUMP
YES, RESET FLAG
KEYPAD / KEY?
YES, JUMP
KEYPAD
*
KEY?
NO, JUMP
KLFLAL1,HOLD_STATE ; IN HOLD STATE?
K6_5 ; YES,AROUND
K55 ; NO,JUMP LEAVING /,
*
AS IS
AND KLFLAG_1,NOT HOLD_STATE; RST HLD ST, DISCARD KEY
KY8DLEXIT ; EXIT INT9 ROUTINE
-----
-
-------------
- ---
,
; HIDDEN CODE - EOH -
00B2 3C EO KL1: CMP AL,HIDN_CODE_EO ; IS P60 SC A HIDDEN CODE?
00B4 75 08 K1O_1 NO, JUMP
00B6 80 OE 0096 R 02
JNE
OR
JMP
KBJLAG_3,LCHC ; SET FLAG
OOBB E9 0396 R
OOBE 3C FF
OOCO 75 03
00C2 E9 0386 R
00C5
00C5 3C 54
00C7 75 10
KYBD9_EXIT ; EXIT ROUTINE
, --------
- -- - - -
- -- - -
- - - --
; OVERRUN SC - FFH
,
K10_1: CMP AL ,OFFH
JNZ K14_S1
JMP K62
; IS THIS AN OVERRUN CHAR
; NO, TEST FOR SYS REQ KEY
; BUFFERJULL_BEEP
-
- --
- - -
- - - - - - -
- - - - - - - - -
- -
- - - - - - - - - - --
- - -
- - - - -- - - -
- - - --
; SYSTEM REQUEST MAKE/BREAK (INT 15H FUNCTION 85H) -
K14_S1 :
CMP
JNE
AL,SYSREQ~AKE
K14_S2
00C9 F6 06 0018 R 04 TEST KB_FLAL1, SYS_SHI FT
K14_S4
SYSTEM REQUEST KEY MAKE
NO, GO LOOK FOR BREAK
ALREADY DEPRESSED?
OOCE 75 18
0000 80 OE 0018 R 04
0005 BO 00
0007 EB OB
0009
0009 3C 04
OODB 75 OE
0000 80 26 0018 R FB
00E2 BO 01
00E4
00E4 B4 85
00E6 CD 15
00E8
00E8 E9 0396
OOEB
OOEB 24 7F
OOED OE
OOEE 07
OOEF
BF 0000
00F2 B9 0000
00F5 F2/ AE
00F7 8A C4
00F9
74 03
OOFB
E9 0187
JNZ
OR
MOV
JMP
K14_S2 :
CMP
JNE
AND
MOV
K14_S3 :
MOV
INT
K14_S4 :
JMP
KB_FLAG_1, SYS_SHI FT
AL,OO
SHORT K14_S3
IF SO THEN THROW AWAY MAKE
SET SYS REQ DEPRESSED FLAG
SET MAKE FLAG
GO DO THE INT 15H
AL,SYSREQ_BREAK SYSTEM REQUEST KEY BREAK?
K16 ; NO, GO TEST FOR SHIFT KEYS
KB_FLAG_1,NOT SYS_SHIFT ; RESET SYS REQ DEPRESSED FLAG
AL,Ol SET REQUEST BREAK FLAG
AH,85H SET SYSTEM REQUEST NOTI FI CAT! ON
15H
KYBD9_EXIT
EXIT
TEST FOR SHI FT KEYS
K16:
AND AL,07FH
PUSH
CS
POP ES
MOV DI,OFFSET K6
MOV CX,OFFSET K6L
REPNE SCASB
MOV AL,AH
JE K17
JMP
K24_0
SHI FT KEY FOUND
TESLSHIFT
TURN OFF THE BREAK BIT
ESTABLISH ADDRESS OF SHIFT TABLE
SHI FT KEY TABLE
LENGTH
LOOK THROUGH THE TABLE FOR A MATCH
RECOVER SCAN CODE
JUMP I F MATCH FOUND
IF NO MATCH, THEN SHIFT NOT FOUND
OOFE 81 EF 000 E K17: SUB DI,OFFSET K6+1 ADJUST PTR TO SCAN CODE MTCH
0102 2E: 8A A5 0000 E MOV AH,cs:K7[DI] ; GET MASK INTO AH
ROM BIOS 2-69