IBM PC CONVERTIBLE

CHECK FOR PRINT SCREEN
-
EOI THEN INT 5H - SHIFT + */PRTSC
0204
K45:
0204 3C 37
CMP Al, P60--ASTRLSC PRINT SCREEN KEY?
0206 75 09 JNE K46
NO, JMP
0208 BO 20 MOV Al, EOI EOI TO AllOW MORE INTERRUPTS
02DA E6 20 OUT INTAOO,Al
02DC CD 05
INT 5H ISSUE PRINT SCREEN INTERRUPT
02DE E9 039B R
JMP KYBDLRET
GO TO NON_EO I EX IT
CHECK FOR FUNCTION KEY [[[ SHIFT + (Fl-FlO) ]]]
02El K46:
02El 3C 3B
CMP Al, FLKEY Fl - FlO KEY?
02E3 72 06 JB K47
NO, JMP
02E5 BB 0000 E
MOV BX,OFFSET K12 BX SHIFT F1-FlO EXT ASCII TBl
02E8 E9 037C R
JMP K63
GO XLATE & BUilD PSEUDO SC
KEY IS IN TYPEWRITER REGION [[[ SHIFT + TYPEWRITER KEY]]]
02EB K47 :
02EB BB 0000 MOV BX,OFFSET Kll ; BX=UPPERCASE ASCI I CODE TBl
02EE EB 40
JMP
SHORT K56 ; GO TRANSLATE TO ASCI I CODE
--- -- - - - - - - - - - - - - - - - - - --- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - --
; KEYPAD KEY: NOT IN AlT OR CTl SHIFT:DETERMINE IF KEYPAD OR PG/CUR
------------ -- - - - - - - - - --- - - - - - - - - - -- - - - - -- - - - - - - - - - - - - - - - - - -- - - - - - --
02FO K48:
02FO F6 06 0017 R 20 TEST KBJlAG,NUM_STATE ; IN NUM_STATE?
02F5 75 20 JNZ K52
; YES, JMP
02F7 F6 06 0017 R 03 TEST KBJlAG, lEFLSHI FT +RIGHLSHI FT ; NUM_STATE?
02FC 75 20 JNZ K53 ; YES, GO PROCESS
BASE CASE KEYPAD (PAGE/CURSOR)
KEY -PAGE/CURSOR, DEL,
-, + ---
02FE K49 :
02FE 3C 4A
CMP Al,KYPDJ1INUS
KEYPAD MINUS KEY?
0300 74 OB
JE K50 YES, JMP
0302 3C 4E
CMP
Al, KYPD_PlUS KEYPAD PLUS KEY?
0304 74 OC
JE K51
YES, JMP
0306 2C 47
SUB Al,71
ADUST SC FOR TABLE OFFSET
0308 BB 0000
MOV
BX,OFFSET K15 BX=KEYPAD AREA BASE CASE TBl
030B EB 71
JMP
SHORT K64 GO TRANSLATE & BUilD PSEUDO SC
0300 K50:
0300
B8 4A2D MOV
AX,74*256+'-
,
BlD EXT ASCI I CODE FOR MINUS
0310 EB 22
JMP
SHORT K57 BUFFEILFIll
0312 K51 :
0312 B8 4E2B MOV
AX, 78*256+' +'
BlD EXT ASCI I CODE FOR PLUS
0315 EB 10
JMP SHORT K57 BUFFEILFIll
IN NUM_STATE - CHECK IF TEMPORARilY SHIFTED OUT
0317 K52 :
0317 F6 06 0017 R 03 TEST KB_FlAG, lEFT _SHI FT +RI GHT _SHI FT ; NOT NUM STATE?
031C 75 EO
JNZ K49
; YES, JMP TO BASE
; KEYPAD XlAT
031E K53:
[[[ KEYPAD 0-9, ., -, + ]]]
031E 2C 46
SUB
Al,70 ADJUST SC FOR TABLE OFFSET
0320 BB 0000 MOV
BX ,OFFSET K14 BX=KEYPAD KEYS' ASCI I CODES
0323 EB OB
JMP
SHORT K56 GO XLATE & BUilD ASCII CODE
----------------------------------------------------- --
; NOT IN ANY SHI FT STATE
; KEYPAD REGION HAS BEEN PROCESSED (SC 69 & UP) -
CHECK FOR
F1-F10 [[[ BASE Fl - FlO ]]]
0325 K54:
0325
3C 3B CMP
Al,FLKEY FUNCTI ON KEY?
0327 72 04
JB
K55 NO, JMP
0329 BO 00 MOV Al,O SCAN CODE IN AH ALREADY
032B EB 37 JMP SHORT K61
BUFFER_Fill
KEY MUST
BE
FROM TYPEWRITER REGION -- BASE TYPEWRITER KEY ---
2-74 ROM BIOS