|
Technical
Reference
57
contents
of
each
byte
in
the
CMOS
RAM
are
listed
below:
Address
Description
00
Seconds
01
Second
alarm
02
Minutes
03
Minute
alarm
04
Hours
05
Hour
alarm
06
Day
of
week
07
Date
of
month
08
Month
09
Year
0A
Status
register
A
0B
Status
register
B
0C
Status
register
C
0D
Status
register
D
0E
Diagnostic
status
byte
0F
Shutdown
status
byte
10
Diskette
drive
type
byte,
drive
A
and
B
11
Fixed
disk
type
byte,
drive
C
12
Fixed
disk
type
byte,
drive
D
13
Reserved
14
Equipment
byte
15
Low
base
memory
byte
16
High
base
memory
byte
17
Low
expansion
memory
byte
18
High
expansion
memory
byte
19
‐
2D
Reserved
2E
‐
2F
2
‐
byte
CMOS
checksum
30
Low
actual
expansion
memory
byte
31
High
actual
expansion
memory
byte
32
Date
century
byte
33
Information
flags
(set
during
power
on)
34
‐
7F
Reserved
for
system
BIOS
