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Hard Disk Drive Type Byte (Hex 012): This byte defines the type
of hard disk drive installed. Hex 00 indicates that no hard disk drive
is installed.
Figure
2-26. Hard Disk Drive Type Byte
Bit
Drive Type
7–4
Hard disk drive 0
3–0
Hard disk drive 1
Reserved Bytes (Hex 013): These bytes are reserved.
Equipment Byte (Hex 014): This byte defines the basic equipment
in the system for the power-on diagnostic tests.
Figure 2-27. Equipment Byte
Bit
Description
7, 6
Number of diskette drives
5, 4
Display operating mode
3, 2
Reserved
1
Coprocessor presence
0
Diskette drive 0 presence
Bits 7, 6
These bits indicate the number of installed diskette
drives.
Figure
2-28. Installed Diskette Drive Bits
Bits 7,6
Number of Diskette Drives
0 0
One drive
0 1
Reserved
1 0
Reserved
1 1
Reserved
Bits 5, 4
These bits indicate the operating mode of the display
attached to the video port.
Figure
2-29. Display Operating Mode Bits
Bits 5,4
Display Operating Mode
0 0
Reserved
0 1
40-column mode
1 0
80-column mode
1 1
Monochrome mode
System Board
2-27
Содержание ThinkPad 770
Страница 1: ...05L1739 S05L 1739 00...
Страница 6: ...vi...
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Страница 133: ...Function Declaration C Language Smapi BIOS function typedef WORD far SMB FPINPARM FPOUTPARM SMAPI BIOS B 57...
Страница 148: ...IBM Part Number 05L1739 Printed in the United States of America...