IBM ThinkPad 770, Reference Manual

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Description
The IBM ThinkPad 770 computer (hereafter called the ThinkPad
computer or the computer) is notebook-size computer that feature
the AT bus architecture. Each computer supports one UltraBay II
and one internal hard disk drive. The ThinkPad 770 computer also
supports an internal CD-ROM drive or an internal DVD drive as an
option.
Programs can distinguish the foregoing computer model from other
ThinkPad models by reading the system ID:
Ÿ
Interrupt 15H
Ÿ
Function code (AH)=23H and (AL)=10H.
Ÿ
Returns
(AL)=27H
The system microprocessor contains an internal cache and cache
controller.
Figure 1-1 lists the model bytes, submodel bytes, and system clock
speed of the system board for each model.
Figure 1-1. Model and Submodel Bytes
Model Model Byte
(Hex) Submodel Byte
(Hex) System Clock
770 FC 01 33 MHz
For a listing of the other systems, refer to the
IBM Personal
System/2 and Personal Computer BIOS Interface.
1-2 System Overview