IBM PC CONVERTIBLE

BIOS Data Areas
0000
0000
04 [
0008 04 [
0010 ????
0012 ??
0080
0040
0020
= 0010
= 0002
= 0001
0013 ????
0015 ??
= 0080
= 0040
= 0020
-- --- - -- - - - --- - - - - - --- - - - - -- - -- - - - - -- - --
; ROM BIOS DATA AREAS
DATA
SEGMENT AT 40H
RS23LBASE
DW
4 DUP(?) ADDR RS232 ADA (COM1-COM4)
????
PRINTEILBASE ow
4 DUP(?) AD DR PRINTERS (LPTl-LPT3)
????
EQUIPMENT WORD
OW ; INSTALLED HARDWARE
I 15-14 I 13 I 12 I 11-9 I 8 I 7 -6 I 5-4 I 3-1 I 0 I
I
I IPL DSKT INSTALLED
-- UNUSED
INITIAL VIDEO MODE
NUMBER OF DISKETTE DRIVES
UNUSED
NUMBER OF COM DEVICES
-- JOYSTICK ATTACHED
INTERNAL MODEM INSTALLED
NUMBER OF PRINTERS ATTACHED
POST STATUS FLAG
POSLSTATUS DB POST ERROR FLAGS AND STATUS
(DURING POST)
FATAL_ERROR
EQU
80H POST DETCD FATAL SYS ERROR
NON-FATAL_ERR
EQU
40H POST HAS DETECTED AN ERROR
(NON_FATAL)
BAD_RTCMEM
EQU
20H RTC MEMORY BAD - DO NOT USE
FEATURE_ERROR
EQU
10H
FEAT DEV FAILED (ROM_SCAN)
MFG~ODE
EQU
02H MANUFACTURING MODE ACTIVE
POSLACTlVE
EQU
01H POST IS CURRENTLY ACTIVE
M E M 0 R Y S I Z ( 1 K B Y T E S )
MEMORLSIZE DW ; MEMORY
SIZE IN K BYTES
BATTERY CONTROL FLAGS
BALSTATUS DB
BATTERY SUPPORT STATUS
LOW_BALSIG
EQU
80H LOW BATTERY SIGNALLED FLAG
LOW_BALHOLO
EQU
40H LOW BATTERY KEY HOLD STATE
LOW_BALPEND
EQU
20H LOW BAT PENDING SECOND SENSE
ROM BIOS 2-17