IBM 770 manual Description, computer, System Overview

Description

The IBM ThinkPad 770 computer (hereafterThinkPadcalled the
computer		or thecomputer) 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:

ŸInterrupt 15H

Ÿ Function code (AH)=23H and (AL)=10H.

ŸReturns (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	Model	Byte	Submodel Byte	System	Clock
	(Hex)		(Hex)
770	FC	01		33	MHz
Figure	1-1. Model	and Submodel	Bytes

For a listing of the other systems,IBM Personalrefer to the System/2 and Personal Computer BIOS Interface.

1-2 System Overview