Lenovo ThinkPad 600E Technical Reference Manual for the ThinkPad 600 - Page 46

Diagnostic Status Byte Hex 00E, Shutdown Status Byte Hex 00F, CMOS RAM Configuration, Bit 7, Bits 1

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CMOS RAM Configuration Figure 2-21 shows the bit definitions for the CMOS RAM configuration bytes. Diagnostic Status Byte (Hex 00E) Bit Function 7 Real-time clock power 6 Configuration record and checksum status 5 Incorrect configuration 4 Memory size mismatch 3 Hard disk controller/drive C initialization status 2 Time status indicator 1, 0 Reserved Figure 2-21. Diagnostic Status Byte (Hex 00E) Bit 7 If set to 1, this bit indicates that the real-time clock has lost power. Bit 6 If set to 1, this bit indicates that the checksum is incorrect. Bit 5 This bit indicates the results of a power-on check of the equipment byte (hex 014). If set to 1, this bit indicates that the configuration information is incorrect. Bit 4 If set to 1, this bit indicates that the memory size does not match the configuration information. Bit 3 If set to 1, this bit indicates that the controller or hard disk drive failed initialization. Bit 2 If set to 1, this bit indicates that the time is invalid. Bits 1, 0 These bits are reserved. Shutdown Status Byte (Hex 00F): This byte is defined by the power-on diagnostic programs. 2-24 System Board

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CMOS RAM Configuration
Figure
2-21 shows the bit definitions for the CMOS RAM
configuration bytes.
Diagnostic Status Byte (Hex 00E)
Figure
2-21.
Diagnostic Status Byte (Hex 00E)
Bit
Function
7
Real-time clock power
6
Configuration record and checksum status
5
Incorrect configuration
4
Memory size mismatch
3
Hard disk controller/drive C initialization status
2
Time status indicator
1, 0
Reserved
Bit 7
If set to 1, this bit indicates that the real-time clock has
lost power.
Bit 6
If set to 1, this bit indicates that the checksum is incorrect.
Bit 5
This bit indicates the results of a power-on check of the
equipment byte (hex 014).
If set to 1, this bit indicates
that the configuration information is incorrect.
Bit 4
If set to 1, this bit indicates that the memory size does not
match the configuration information.
Bit 3
If set to 1, this bit indicates that the controller or hard disk
drive failed initialization.
Bit 2
If set to 1, this bit indicates that the time is invalid.
Bits 1, 0
These bits are reserved.
Shutdown Status Byte (Hex 00F):
This byte is defined by the
power-on diagnostic programs.
2-24
System Board