Specifications

vii
PREFACE
About This Note
This note is a supplement to Macintosh Developer Notes, Number 2, Macintosh
Duo System, APDA publication number R0457LL/A. It describes the design
features of the PowerBook Duo 270c computer, which is basically a
PowerBook Duo computer with an active-matrix color display, expanded
hard disk capabilities, higher capacity batteries, and an integrated
floating-point unit (FPU).
This note provides the hardware or software developer with the additional
information needed to design hardware and software elements for the
PowerBook Duo 270c computer. This publication assumes you are familiar
with the functionality and programming requirements for Apple Macintosh
computers. It contains the following three chapters and an appendix:
■
Chapter 1, “Introduction to the PowerBook Duo 270c Computer”
■
Chapter 2, “Hardware Modifications”
■
Chapter 3, “Software Modifications”
The chapters and appendix are followed by an index.
Conventions Used In This Book 0
This developer note uses the following conventions:
IMPORTANT
A note like this contains information that is essential to an
understanding of the text, and of the PowerBook Duo 270c computer.
▲
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WARNING
A note like this directs your attention to something that could cause
injury to staff, damage to equipment, or loss of data.
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A slash in front of a signal name (/RESET) indicates an active low signal.