Lenovo ThinkPad 770E-ED Technical Reference Manual for the ThinkPad 770 - Page 12

Description, ThinkPad, computer, IBM Personal, System/2 and Personal Computer BIOS Interface

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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: Interrupt 15H Function code (AH)=23H and (AL)=10H. 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. Model 770 Model Byte (Hex) FC Submodel Byte (Hex) 01 System Clock 33 MHz Figure 1-1. Model and Submodel Bytes For a listing of the other systems, refer to the IBM Personal System/2 and Personal Computer BIOS Interface. 1-2 System Overview

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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:
±
Interrupt 15H
±
Function code (AH)=23H and (AL)=10H.
±
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