IBM PC CONVERTIBLE Technical Reference page 46

0080 ?17?
0082 ?17?
0084 07 [
008B ??
=
0080
008C 02 [
0090 ??
0091 ??
=
0097
0092 ??
0093 ??
0094 ????
0096 17
=
0002
0097 ??
--
-
-
- --
--
-
-
--
-
--- --
--
-
----
-- - --
--
--
-
----
,
; ADDITIONAL KEYBOARD DATA AREA
BUFFEILSTART OW
BUFFEILEND OW
KB_BUFFEILEND BY POST
DB 7 DUP(?)
??
DISKETTE LAST DATA RATE INFORMATION
LASLDAT~RATE
DB
RATE_250KBS EQU 80H
OW
2 DUP(?)
PTRS TO 16 BYTE KBD BUFFER
INIT SET TO KB_BUFFER AND
RESERVED
ALWAYS 80H - 250 KBS RATE
250 KB/SEC DATA RATE VALUE
SET BY POST DISKETTE TEST
RESERVED
????
DISKETTE DRIVE MEDIA TYPE CODES (MEDIA TYPE BYTE
=
0 IF NO DRIVE)
17-615141312-01
1
1
1
1
-- MEDIA TYPE CODES (ALWAYS
III FOR 720KB MEDIA)
RESERVED - ALWAYS 0
-- MEDIA TYPE ESTABLISHED - ALWAYS 1
DOUBLE STEP REQUIRED - NOT SUPPORTED ALWAYS 0
DATA TRANSFER RATE FOR THIS DRIVE - ALWAYS 10 (250 KBS)
MEDIA_TYPLDRO DB
MEDIA_TYPE_DRI DB
MEDI~720KB
EQU
DB
LOW BATTERY WARNING COUNTER
DB
97H
DISKETTE MEDIA TYPE DRIVE 0
DISKETTE MEDIA TYPE DRIVE 1
MEDIA TYPE FOR 720 KB DSKT
RESERVED
LOW BATTERY WARNING COUNTER
RESERVED
KEYBOARD CONTROL FLAG 3 USED BY INTERRUPT 9 KEYBOARD PROCESSING
KBJLAIL3 DB
LCHC EQU 02H
DB
KEYBOARD TRACKING FLAG 3
(CLEARED BY KYBD_RESET
ROUTINE IN POST)
LAST CODE HIDDEN CODE FLAG
RESERVED
ROM BIOS 2-21