IBM PC CONVERTIBLE Technical Reference page 37

=
OOOF
=
0010
=
0011
=
0000
=
0001
=
0002
=
0003
=
0013
=
0014
=
0015
=
0016
=
0017
=
0080
=
0040
=
0002
=
0001
=
0018
=
0019
=
001B
---- BEGINNING OF RTC CMOS DATA AREA ----
REGISTERS FROM HERE TO RTCJlEM....END ARE KEPT CHECKSUMMED
RTCMEM....START EQU 15 ; START OF RTC REGISTER STACK
DISKETTE TYPE INDENTIFIER --- UPPER 4 BITS
=
DRV 0, LOWER
=
DRV
RTCDSKLCON
EQU
16 DSKT CONFIG INFO (0 & 1)
RTCDSKLCON2
EQU 17
DSKT CONFIG INFO (2 & 3)
NO_DRIVE
EQU 0
TPL48
EQU
1 48 TRACK PER INCH DRIVE
TPL96
EQU
2 96 TRACK PER INCH DRIVE
TPL135
EQU
3 135 TRACK PER INCH DRIVE
SYSTEM EQUIPMENT WORD (COPY OF EQUIPMENLWORD IN DATA SEGMENT)
RTCEQU I P _LO
RTCEQU I P _H I
EQU
EQU
19
20
; SYSTEM EQUIPMENT FLAG (LOW)
; SYSTEM EQUIPMENT FLAG (HI)
- 15-14 - 13 - 12 - 11-9 - 8 - 7-6 - 5-4 - 3-1 - 0 -
I
I
IPL DSKT INSTALLED
-- UNUSED
INITIAL VIDEO MODE
NUMBER OF DISKETTE DRIVES
I --
UNUSED
-- NUMBER OF COM DEVICES
-- JOYSTICK ATTACHED
INTERNAL MODEM INSTALLED
NUMBER OF PRINTERS ATTACHED
SYSTEM MEMORY SIZE
RTCMEMS_LO
RTC....MEMS_HI
EQU
EQU
SYSTEM PROFILE INFORMATION
SYS_PROF1
21
22
I
15
I
14
I
13-12
I
11-10
I
9
I
8
I
10 MEMORY SIZE LO BYTE (POST)
10 MEMORY SIZE HI BYTE (POST)
7 - 0
I .
-- UNUSED
RS232/PARL AVAIL ON 8ATTERY
-- MODEM AVAILABLE ON BATTERY
-- LCD HIGH INTENSITY MAPPING
- INITIAL VIDEO MODE
ENABLE LOW BATTERY WARNING
SYSTEM WARM START SELECTED
RTC_SYS_PROFl
EQU 23
RESUME_ENABLE
EQU
80H
LOWBALENABLE
EQU
40H
MODEM_BATT
EQU
02
RS23LBATT EQU 01
RTCSYS_PROF2
EQU 24
RTCLCD_INACT
EQU 25
RTCSYS_INACT
EQU 27
SYSTEM PROFI LE BYTE 1
SYSTEM RESUME ENABLE FLAG
LOW BAT WARNING ENABLE FLAG
MODEM AVAILABLE ON BATTERY
RS232/PARALLEL AVAILABLE ON
BATTERY
SYSTEM PROFILE BYTE 2
INACT TIME TO DISPLAY BLANK
(2 BYTES)
INACT TIME TO SYS POWER OFF
(2 BYTES)
2-12 ROM BIOS