Lenovo ThinkPad 600E Technical Reference Manual for the ThinkPad 600 - Page 47

Diskette Drive Type Byte Hex 010, Hard Disk Drive Type Byte Hex 011, Bits 7-4, System Board

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Diskette Drive Type Byte (Hex 010): This byte indicates the type of the installed diskette drive. Bit Drive Type 7-4 Diskette drive type 3-0 Reserved Figure 2-22. Diskette Drive Type Byte (Hex 010) Bits 7-4 These bits indicate the diskette drive type. Bits 7-4 Description 0 1 1 0 Diskette drive (2.88MB) 0 1 0 0 Diskette drive (1.44MB) Note: Combinations not shown are reserved. Figure 2-23. Diskette Drive Type Bits 7-4 Bits 3-0 These bits are reserved. Hard Disk Drive Type Byte (Hex 011): This byte defines the type of hard disk drive installed. Hex 00 indicates that no hard disk drive is installed. Bit Drive Type 7-4 Hard disk drive type 2 3-0 Hard disk drive type 3 Figure 2-24. Hard Disk Type Byte (Hex 011) Bit 7-4 0 0 0 0 1 1 1 1 Description No drive installed for hard disk drive 2 Use CMOS 1BH for hard disk drive 2 Figure 2-25. Hard Disk Drive Type 2 (Bits 7-4) Bit 3-0 0 0 0 0 1 1 1 1 Description No drive installed for hard disk drive 3 Use CMOS 1CH for hard disk drive 3 Figure 2-26. Hard Disk Drive Type 3 (Bits 3-0) System Board 2-25

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Diskette Drive Type Byte (Hex 010):
This byte indicates the type
of the installed diskette drive.
Figure
2-22.
Diskette Drive Type Byte (Hex 010)
Bit
Drive Type
7–4
Diskette drive type
3–0
Reserved
Bits 7–4
These bits indicate the diskette drive type.
Figure
2-23.
Diskette Drive Type Bits 7–4
Bits 7–4
Description
0 1 1 0
0 1 0 0
Diskette drive (2.88MB)
Diskette drive (1.44MB)
Note:
Combinations not shown are reserved.
Bits 3–0
These bits are reserved.
Hard Disk Drive Type Byte (Hex 011):
This byte defines the type
of hard disk drive installed.
Hex 00 indicates that no hard disk drive
is installed.
Figure
2-24.
Hard Disk Type Byte (Hex 011)
Bit
Drive Type
7–4
3–0
Hard disk drive type 2
Hard disk drive type 3
Figure
2-25.
Hard Disk Drive Type 2 (Bits 7–4)
Bit 7–4
Description
0 0 0 0
1 1 1 1
No drive installed for hard disk drive 2
Use CMOS 1BH for hard disk drive 2
Figure
2-26.
Hard Disk Drive Type 3 (Bits 3–0)
Bit 3–0
Description
0 0 0 0
1 1 1 1
No drive installed for hard disk drive 3
Use CMOS 1CH for hard disk drive 3
System Board
2-25