Lenovo ThinkPad 560E TP 560Z Technical Reference Manual - Page 43
Hard Disk Drive Type Byte X, Reserved Bytes X, Equipment Byte X, Bits 7
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Hard Disk Drive Type Byte (X'012'): This byte defines the type of hard disk drive installed. X'00' indicates that no hard disk drive is installed. Bit Drive Type 7-4 Hard disk drive 0 3-0 Hard disk drive 1 Figure 2-26. Hard Disk Drive Type Byte Reserved Bytes (X'013'): These bytes are reserved. Equipment Byte (X'014'): This byte defines the basic equipment in the system for the power-on diagnostic tests. Bit Description 7, 6 Number of diskette drives 5, 4 Display operating mode 3, 2 Reserved 1 Coprocessor presence 0 Diskette drive 0 presence Figure 2-27. Equipment Byte Bits 7, 6 These bits indicate the number of installed diskette drives. Bits 7,6 0 0 0 1 1 0 1 1 Number of Diskette Drives One drive Reserved Reserved Reserved Figure 2-28. Installed Diskette Drive Bits Bits 5, 4 These bits indicate the operating mode of the display attached to the video port. Bits 5,4 0 0 0 1 1 0 1 1 Display Operating Mode Reserved 40-column mode 80-column mode Monochrome mode Figure 2-29. Display Operating Mode Bits ThinkPad 560Z System Board 2-25