LPX-40_Dev_Note.pdf

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Developer Note
Apple Logic Board Design LPX-40
Developer Note
© Apple Computer, Inc. 1996
Apple Computer, Inc.
© 1996 Apple Computer, Inc.
All rights reserved.
No part of this publication may be
reproduced, stored in a retrieval
system, or transmitted, in any form or
by any means, mechanical, electronic,
photocopying, recording, or otherwise,
without prior written permission of
Apple Computer, Inc., except to make a
backup copy of any documentation
provided on CD-ROM. Printed in the
United States of America.
The Apple logo is a trademark of
Apple Computer, Inc.
Use of the “keyboard” Apple logo
(Option-Shift-K) for commercial
purposes without the prior written
consent of Apple may constitute
trademark infringement and unfair
competition in violation of federal and
state laws.
No licenses, express or implied, are
granted with respect to any of the
technology described in this book.
Apple retains all intellectual property
rights associated with the technology
described in this book. This book is
intended to assist application
developers to develop applications only
for Apple-labeled or Apple-licensed
computers.
Every effort has been made to ensure
that the information in this manual is
accurate. Apple is not responsible for
printing or clerical errors.
Apple Computer, Inc.
1 Infinite Loop
Cupertino, CA 95014
408-996-1010
Apple, the Apple logo, AppleLink,
Apple SuperDrive, GeoPort,
LaserWriter, LocalTalk, Mac, Macintosh,
Performa, PlainTalk, PowerBook, and
Power Macintosh are trademarks of
Apple Computer, Inc., registered in the
United States and other countries.
Adobe Illustrator and PostScript are
trademarks of Adobe Systems
Incorporated, which may be registered
in certain jurisdictions.
Helvetica and Palatino are registered
trademarks of Linotype Company.
The word SRS is a registered trademark
of SRS Labs, Inc.
ITC Zapf Dingbats is a registered
trademark of International Typeface
Corporation.
PowerPC is a trademark of
International Business Machines
Corporation, used under license
therefrom.
Simultaneously published in the United
States and Canada.
LIMITED WARRANTY ON MEDIA AND
REPLACEMENT
If you discover physical defects in the
manual or in the media on which a software
product is distributed, ADC will replace the
media or manual at no charge to you
provided you return the item to be replaced
with proof of purchase to ADC.
ALL IMPLIED WARRANTIES ON THIS
MANUAL, INCLUDING IMPLIED
WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR
PURPOSE, ARE LIMITED IN DURATION
TO NINETY (90) DAYS FROM THE DATE
OF THE ORIGINAL RETAIL PURCHASE
OF THIS PRODUCT.
Even though Apple has reviewed this
manual, APPLE MAKES NO WARRANTY
OR REPRESENTATION, EITHER EXPRESS
OR IMPLIED, WITH RESPECT TO THIS
MANUAL, ITS QUALITY, ACCURACY,
MERCHANTABILITY, OR FITNESS FOR A
PARTICULAR PURPOSE. AS A RESULT,
THIS MANUAL IS SOLD “AS IS,” AND
YOU, THE PURCHASER, ARE ASSUMING
THE ENTIRE RISK AS TO ITS QUALITY
AND ACCURACY.
IN NO EVENT WILL APPLE BE LIABLE
FOR DIRECT, INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL
DAMAGES RESULTING FROM ANY
DEFECT OR INACCURACY IN THIS
MANUAL, even if advised of the possibility
of such damages.
THE WARRANTY AND REMEDIES SET
FORTH ABOVE ARE EXCLUSIVE AND IN
LIEU OF ALL OTHERS, ORAL OR
WRITTEN, EXPRESS OR IMPLIED. No
Apple dealer, agent, or employee is
authorized to make any modification,
extension, or addition to this warranty.
Some states do not allow the exclusion or
limitation of implied warranties or liability
for incidental or consequential damages, so
the above limitation or exclusion may not
apply to you. This warranty gives you
specific legal rights, and you may also have
other rights which vary from state to state.
Contents
Figures and Tables
vii
ix
Preface
About This Note
Contents of This Note
ix
Supplemental Reference Documents
ix
The
Apple Developer Catalog
x
Apple Developer World Web Site
x
Conventions and Abbreviations
x
Typographical Conventions
xi
Standard Abbreviations
xi
Chapter 1
Introduction
1
3
Summary of Features
2
Comparison With Power Macintosh 6400 Computer
Compatibility Issues
4
MFM Floppy Drive
5
DRAM Expansion
5
DRAM DIMM Dimensions
6
Cache Expansion
6
ATA (IDE) Hard Disk and ATAPI CD-ROM Drive
PS/2 Keyboard Support
6
Video Display RAM
6
6
Chapter 2
Architecture
9
Block Diagram and Main ICs
10
Main Processor
10
PowerPC 603e Microprocessor
PowerPC 604e Microprocessor
Memory Subsystem
11
RAM
11
ROM
11
Second-Level Cache (Optional)
System RAM
13
Custom ICs
13
PSX IC
13
O’Hare IC
15
AWACS Sound IC
15
10
10
11
iii
CudaLite IC
16
ATI 264VT-A4S2 IC
Display RAM DIMM
16
16
Chapter 3
I/O Features
19
Board Layout
20
Serial I/O Ports
22
Apple Printer and Modem Ports
22
PS/2 Keyboard and Mouse Ports
24
ADB Port
26
Apple ADB Keyboard
27
Disk Drives
28
Floppy Disk Drives
28
GCR Floppy Disk Drive
28
MFM Floppy Disk Drive
29
ATA (IDE) Hard Disk
30
Hard Disk Specifications
30
Hard Disk Connectors
32
Pin Assignments
32
ATA (IDE) Signal Descriptions
33
CD-ROM Drive
33
SCSI Bus
34
SCSI Connector
34
SCSI Bus Termination
35
Sound
35
Sound Output
35
Sound Input
36
Sound Input Specifications
37
Digitizing Sound
38
Sound Modes
38
Built-in Video
38
Video Connectors
39
Video Display Sense Codes
41
Video Display Resolution
44
Power Supply
44
Power Specifications
45
Power Supply Connectors
46
Chapter 4
Expansion Features
DRAM DIMMs
48
DRAM DIMM Connectors
RAM Address Multiplexing
47
50
53
iv
RAM Devices
54
RAM Refresh
54
RAM DIMM Dimensions
Second-Level Cache DIMM
Video RAM
58
Video RAM DIMM Card
PCI Expansion Slot
62
54
56
61
Chapter 5
MFM Floppy Disk Device Driver
65
About the MFM Floppy Disk Driver
66
Using the MFM Floppy Disk Driver
67
MFM Floppy Driver API Reference
67
Read and Write Prime Routines
67
Control Calls
69
Status Calls
77
Copy Protection and MFM Floppy Disk Controllers
Floppy Drive Gestalt Selector
81
80
Index
83
v

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