IBM PC CONVERTIBLE Technical Reference page 96

0184 KYBD9_EXITl:
0184 E9 0396 R JMP KY BDLEX IT
I NTERRUPLRETURN
; ----- TEST FOR Fll OR Fl2 MAKE
0187
0187 B4 85
0189 3C 57
018B 74 06
0180 FE C4
018F 3C 58
0191 75 32
K24_0:
MOV
CMP
JE
INC
CMP
JNE
AH, FlLBASL.ASCI I
AL,FlLMAKE3C
K24_l
AH
AL, FlLMAKE_SC
K25
AH HAS BASE Fll EXT ASCII
F1l MAKE?
YES, JUMP
AH HAS BASE F12 EXT ASCI I
F12 MAKE?
NO, JUMP
;
-- -- ----- - -- -
----
--
- --
-- --
-- ------ - - ---- --
-
--
-- - -- --
--
- -- -- --- - -- --
; F1l / F12 FOUND - CHECK FOR ALT+, CTL+, SHIFT+ F1l/F12
0193
0193 F6 06 0018 R 08
0198 74 08
019A 80 26 0018 R F7
019F E9 0396 R
01A2
01A2 F6 06 0017 R OF
01A7 74 17
01A9 80 C4 06
OIAC F6 06 0017 R 08
OlBl 75 00
01B3 80 EC 02
01B6 F6 06 0017 R 04
OIBB 75 03
OlBD 80 EC 02
OICO
OICO 2A CO
01C2 E9 0364 R
K24_l:
TEST
JZ
AND
JMP
K24_5:
TEST
JZ
ADD
TEST
JNZ
SUB
TEST
JNZ
SUB
K24_7 :
SUB
JMP
KB_FLAG_l,HOLD_STATE ; HOLD STATE?
K24_5 ; NO, AROUND
KB_FLAG_l,NOT HOLD_STATE; YES, ENTERED KEY ONLY
KYBDLEXIT ; RESETS HOLD STATE
KB_FLAG ,AL LSHI FT +CTL_SHI FT +LEFLSHI FT +RIGHT _SH I FT
K24_7
AH,6
KB_FLAG, AL LSH I FT
K24_7
AH,2
KB-FLAG, CTL_SHI FT
K24_7
AH,2
AL,AL
K6l
ANY SHIFT STATES?
NO, AROUND WITH BASE Fll/Fl2
AH HAS ALT+F1l/F12 EXT ASCII
ALT SHIFT CASE?
YES, JUMP
AH HAS CTL +Fll/F12 EXT ASCII
CTL SH I FT CAS E?
YES, JUMP
AH HAS SHIFT+Fll/F12 EXT ASCII
CLEAR AL TO MAKE AX EXTNDED SC
GO BUFFER Fll/F12 EXT ASCI I
- -- -
--
---
--
-- ----
-- -- -- ---
,
; TEST FOR HOLD STATE
01C5 K25:
NO-SHI FT -FOUND
01C5 8A EO
MOV AH,AL RESTORE AH AFTER Fll/ F12 TEST
01C7 3C 80 CMP AL,80H 8REAK SC?
01C9 73 B9 JAE
KYBDLEXITl ; YES, EOI EXIT
; ««««<
)»»>>
; <
NO BREAK CODES PAST HERE
»
; ««««<
»»»)
OICB F6 06 0018 R 08
TEST KBJLAG....l,HOLD_STATE ; ARE WE IN HOLD STATE
0100 74 OC JZ K28 ; BRANCH AROUND TEST I F NOT
0102 3C 45 CMP AL,NUM-KEY
0104 74 AE JE KYBDLEXITl ; CAN' T END HOLD ON NUtLLOCK
0106 80 26 0018 R F7 AND
KB_FLAG_l,NOT HOLD3TATE ; TURN OFF HOLD STATE BIT
OIDB E9 0396 R JMP KYBDLEXIT
NOT IN
HOLD STATE, TEST FOR SPECIAL CHARS
OlOE
K28: ; NO-HOLD-STATE
OlOE F6 06 0017 R 08 TEST
KB_FLAG,AL LSHI FT ; ARE WE IN ALTERNATE SHI FT
01E3 75 03
JNZ K29 ; JUMP IF ALTERNATE SH 1FT
01E5 EB 60 90 JMP K38
; JUMP I F NOT ALTERNATE
;
- --
-----
--- -- --- -- -- ---
----
--- --
----
-- --- - - - --
--
-- -- -- - --
01E8
01E8 F6 06 0017 R 04
OlEO 74 00
OIEF 3C 53
01F1 75 09
K29:
TEST
JZ
CMP
JNE
KB_FLAG,CTL_SHI FT
K3l
AL,DEL_KEY
K3l
TEST -RESET
ARE WE IN CONTROL SHI FT ALSO
NO_RESET
SHI FT STATE THERE, TEST KEY
NO_RESET
ClL-ALT -DEL ENTERED, DO I/O CLEANUP FOR SOFT START
,
01F3 C7 06 0072 R 1234
01F9 E9 0000 E
MOV
JMP
RESELFLAG, l234H ; SET FLAG FOR RESET FUNCTION
START ; JUMP TO POWER ON DIAGNOSTICS
ROM BIOS 2-71