IBM Personal System/2 65 SX User Manual

Status Register D (Hex 00D)
Bit Function
7 Valid RAM
6-0 Reserved
Figure 93-14. Status Register D
Bit
7
This
read-only
bit
monitors
the
internal
battery.
When
set
to
1,
this
bit
indicates
that
the
real-time
clock
has
power.
When
set
to
0,
it
indicates
that
the
real-time
clock
has
lost
power.
Bits6-0 These bits are reserved.
CMOS RAM Configuration
The
following
shows
the
bit
definitions
for
the
CMOS
RAM
configuration
bytes.
Diagnostic-Status Byte (Hex 00E)
go
-
Function
Real-Time Clock Chip Power
Configuration Record and Checksum Status
Incorrect Configuration
Memory-Size Mismatch
Fixed Disk Controlier/Drive C Initialization Status
Time-Status Indicator
Adapter-Configuration Miscompare
Adapter-ID Time-Out
OANWOAAON
Figure 3-15. Diagnostic-Status Byte
Bit
7
When
set
to
1,
this
bit
indicates
that
the
real-time
clock
chip
lost
power.
Bit6
When
set
to
1,
this
bit
indicates
that
the
checksum
is
incorrect.
Bits
This
is
a
power-on
check
of
the
equipment
byte
(hex
014).
When set to 1, this bit indicates that the configuration
information is incorrect.
Bit
4
When
set
to
1,
this
bit
indicates
that
the
memory
size
does
not
match
the
configuration
information.
Bit3 When set to 1, this bit indicates that the controller or fixed
disk drive failed initialization.
Model 65 System Board — October 1990 3-17

IBM Personal System/2 65 SX Specifications

General

Brand	IBM
Model	Personal System/2 65 SX
Category	Desktop
Language	English