IBM PC CONVERTIBLE Technical Reference page 43

0016
??
=
0080
=
0040
= 0020
=
0010
=
0004
=
0002
=
0001
0017
0017 ??
=
0080
=
0040
=
0020
=
0010
=
0008
=
0004
=
0002
=
0001
0018
??
=
0080
=
0040
=
0020
=
0010
=
0008
=
0004
0019
??
001A
????
001C ????
001E
10
003E
=
0027
B I
o
S STATUS F LAG
BIOS_STATUS
DB
DSP _BLANKED
EQU 80H
F _RESUME
EQU
40H
KYBD.JICTIVE
EQU 20H
BOOLF1HIT EQU lOH
DCLSUPPORTED EQU 04H
FORCUJCL
EQU
02H
KB_NOISE.JICT
EQU 01H
, --
-
------------
-
--
- --
--
-
- -
-
-
-
-
-
- -
-
-
- - -
--
BIOS STATUS FLAGS
DISPLAY HAS BEEN BLANKED
(KYBD INACTIVE)
FORCE SYSTEM RESUME MODE REQ
KEBD HAS HAD A KEY PRESSED
Fl KEY HIT IN BOOT ROUTINE
DSKT CHANGE LINE SUPPORTED
SYS RESUMED - FORCE DISKETTE
CHANGE LINE ERROR ON NEXT OP
FLAG TO SHOW AUDIO ROUTINE
; KEYBOARD DATA AREAS
KEY
KEY
KEY
????
LABEL BYTE KYBD INT 9 AND INT 16 FLAGS
AND BFR (CLRD BY KYBD_RESET
ROUTINE DURING POST)
BOA R D
r
LAG
KBJLAG DB ;KEYBOARD FLAG STATUS BYTE 1
INS_STATE
EQU 80H INSERT STATE IS ACTIVE
CAPS_STATE
EQU
40H CAPS LOCK STATE TOGGLED
NUM_STATE
EQU
20H NUM LOCK STATE TOGGLED
SCROLL_STATE
EQU
10H
SCROLL LOCK STATE TOGGLED
ALT_SHIFT
EQU 08H AL TERNATE SHI FT KEY PRESSED
CTLSHIFT
EQU
04H CONTROL SHIFT KEY PRESSED
LEFLSHI FT
EQU
02H LEFT SHI FT KEY PRESSED
RIGHLSHIFT
EQU 01H RIGHT SHIFT KEY PRESSED
BOA R 0 F LAG 1
KB_FLAIi-1
DB SECOND BYTE OF KEYBOARD STATUS
INS_SHIFT
EQU
80H INSERT KEY IS DEPRESSED
CAPS_SHIFT
EQU
40H CAPS LOCK KEY IS DEPRESSED
NU~SHIFT
EQU
20H NUM LOCK KEY IS DEPRESSED
SCROLL_SHI FT
EQU
lOH SCROLL LOCK KEY IS DEPRESSED
HOLD_STATE
EQU 08H SUSPEND KEY HAS BEEN TOGGLED
SYS_SHI FT
EQU
04H SYS REQUEST KEY IS DEPRESSED
ALT_INPUT
DB
STORAGE FOR AL T KEYPAD ENTRY
BOA R 0 A SCI I B U F E R AND POINTERS
BUFFER_HEAD OW
; POINTER TO HEAD OF KBD BUFFER
HEAD
=
TAIL INDICATES THAT THE BUFFER IS EMPTY
BUFFEILTAIL OW ; POINTER TO TAIL OF KBD BUFFER
KB_BUFFER
OW 16 DUP (?) ; ROOM FOR 16 ENTRI ES
KLBUFFER_END
LABEL WORD ; LAST BYTE IN KB.JIREALLNG
KB.JIREALLNG
EQU
$-KB.JIREA1 ; LNTH OF KEYBOARD AREA
2-18 ROM BIOS