Apple LC520 Especificações

 Developer Note Developer Press© Apple Computer, Inc. 2000  Developer Note Macintosh LC 520 Computer

x PREFACE Supplemental Reference Documents 0 To supplement the information in this developer note, developers should have copies of the appropriate

xi PREFACE To order products or to request a complimentary copy of the APDA Tools Catalog , contact APDA Apple Computer, Inc. P.O. Box 319Buffalo,

xii PREFACE Here are other abbreviations used in this developer note:mA milliamperes µs microsecondsµA microamperes ns nanoseconds MB megabytes sec.

CHAPTER 1 Introduction 1Figure 1-0Listing 1-0Table 1-0

CHAPTER 1 Introduction 2 Summary of Features The Macintosh LC 520 computer is an integrated Macintosh computer with a built-in color display. It is a

CHAPTER 1 IntroductionIntegrated Design 3 integrated case larger than that of the Macintosh Color Classic RAM expandable to 36 MB instead of 10

CHAPTER 1 Introduction 4 Built-in Color Display Figure 1-1 Front view of the Macintosh LC 520 computer Back View 1Figure 1-2 shows the back of the Ma

CHAPTER 1IntroductionBuilt-in Color Display 5Figure 1-2 Back view of the Macintosh LC 520 computerThe display screen in the Macintosh LC 520 computer

CHAPTER 1Introduction6 Power On and OffVideo RAM 1The Macintosh LC 520 computer comes with 512 KB of VRAM and a socket for a SIMM with an additional 2

CHAPTER 1IntroductionPower Saver 7Power Saver 1The power saver is an optional feature that automatically turns off the display whenever the Macintosh

 Apple Computer, Inc.© 2000, Apple Computer, Inc.All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, o

CHAPTER 1Introduction8 RAM ExpansionRAM Expansion 1The Macintosh LC 520 computer comes with 4 MB of RAM built in. By installing a SIMM, the user can e

CHAPTER 1IntroductionRAM Expansion 9Figure 1-5 RAM expansion SIMM R 1.57 ± 0.1[.062 ± .004]10.16 ± 0.20[.400 ± .008]107.95 ± 0.20[4.25 ± .008]101.19 ±

CHAPTER 1Introduction10 PDS Expansion SlotPDS Expansion Slot 1The Macintosh LC 520 computer has a single internal 114-pin expansion connector that pro

CHAPTER 1IntroductionSCSI Bus 11The Macintosh LC 520 computer includes a new feature that automatically provides the proper termination when no extern

CHAPTER 1Introduction12 Floppy Disk DriveComparison of SCSI Arrangements 1There are now three arrangements of SCSI cabling and termination used in Mac

CHAPTER 1IntroductionSerial I/O Ports 13Serial I/O Ports 1The Macintosh LC 520 computer has two serial ports, one for a printer and one for a modem. T

CHAPTER 1Introduction14 Serial I/O PortsFigure 1-6 Serial port socketsThe extra pin on the modem connector provides +5V power from the ADB power suppl

CHAPTER 1IntroductionADB Ports 15ADB Ports 1The ADB ports are functionally the same as those on other Macintosh computers. The Apple Desktop Bus is a

CHAPTER 1Introduction16 KeyboardMicrophone 1The Macintosh LC 520 computer has a built-in microphone at the front of the case. The microphone is conne

CHAPTER 1IntroductionKeyboard 17NoteThe user must hold down a key combination for at least 1 second to allow the ADB microcontroller enough time to re

iiiContents Figures and Tables vii Preface About This Note ixContents of This Note ixSupplemental Reference Documents xConventions and Abbreviations

CHAPTER 2Architecture 2Figure 2-0Listing 2-0Table 2-0

CHAPTER 2Architecture20 Block DiagramThis chapter describes the architecture of the Macintosh LC 520 computer. It describes the main components on the

CHAPTER 2ArchitectureBlock Diagram 21Figure 2-1 Block diagram A31–0D31–0D31–0A21–2D31–0DFAC IIADBtransceiverCuda(68HC05)ADBmicro-controllerRA10–0D15

CHAPTER 2Architecture22 Block DiagramCombo Custom IC 2In the Macintosh LC 520 computer, the functions of two interface ICs, the SCC (85C30) and the SC

CHAPTER 2ArchitectureAddress Map 23One way of using sound record with playthrough is in the recording of sounds from a CD or CD-ROM. IMPORTANTAs in th

CHAPTER 2Architecture24 Address MapFigure 2-2 24-bit and 32-bit address maps $FFFF FFFF$F000 0000$7000 0000$50FF FFFF$4000 0000Video RAMRAM$0000 00

CHAPTER 2ArchitectureVideo Display Timing 25Video RAM 2The Macintosh LC 520 computer uses separate video RAM (VRAM) to store the screen buffer. The vi

CHAPTER 2Architecture26 Video Display TimingFigure 2-3 Standard video timingVideo224 dots 640 dots864 dotsBack porch = 96 dotsHorizontal sync pulse =

CHAPTER 2ArchitectureVideo Display Timing 27When the Apple IIe Card for the Macintosh is installed in the expansion slot, the Macintosh LC 520 compute

iv Chapter 2 Architecture 19Block Diagram 20MC68030 Microprocessor 20Ardbeg Custom IC 20Ariel Custom IC 20Combo Custom IC 22Cuda ADB Controller 22Sou

CHAPTER 2Architecture28 Video Display TimingFigure 2-4 Video timing for the Apple IIe card Video144 dots 560 dots704 dotsBack porch = 80 dotsHorizonta

CHAPTER 3Expansion 3Figure 3-0Listing 3-0Table 3-0

CHAPTER 3Expansion30 Expansion SlotThe expansion feature of the Macintosh LC 520 computer is a processor-direct slot that connects directly to the MC6

CHAPTER 3ExpansionExpansion Slot 31Table 3-1 Signals on the 96-pin section of the expansion connectorPin number Row A Row B Row C1 SNDOUT Analog GND /

CHAPTER 3Expansion32 Expansion SlotAll the signals on the expansion connector are capable of driving at least one TTL load (1.6 mA sink, 400 µA source

CHAPTER 3ExpansionExpansion Slot 33/CPU.BG Processor bus grant; signal from the external device can become bus master following completion of current

CHAPTER 3Expansion34 The PDS Expansion Card▲WARNINGThe SNDOUT pin must not be grounded; doing so will short-circuit the +5V power to the sound ciruitr

CHAPTER 3ExpansionThe PDS Expansion Card 35restrictions for the expansion card. Foldout 3 shows how the card is installed on the main logic board. Ex

CHAPTER 3Expansion36 The PDS Expansion CardPower for the Expansion Card 3The PDS card uses power supplied through the 96-pin connector. The maximum cu

CHAPTER 4Software 4Figure 4-0Listing 4-0Table 4-0

v The Screen Driver 42Screen Driver Calls 42Open 43Control 43Status 44 Chapter 5 Internal Storage Devices 45Storage Device Slide-In Bays 46Front Driv

CHAPTER 4Software38 ROM SoftwareThe first part of this chapter describes the software in the Macintosh LC 520 computer’s ROM. The second part describe

CHAPTER 4SoftwareROM Software 39One-Second Interrupt 4As on the Macintosh Color Classic and Macintosh LC III computers, the one-second interrupt on th

CHAPTER 4Software40 System SoftwareSystem Software 4The Macintosh LC 520 computer requires System 7.1 or a later version of system software. The disk

CHAPTER 4SoftwareSystem Software 41Sound Control Panel 4The Sound control panel on the Macintosh LC 520 computer is able to update its slider to reflec

CHAPTER 4Software42 System SoftwareScreen Control Panel 4The Screen control panel has sliders for adjusting brightness and contrast. The user can adju

CHAPTER 4SoftwareSystem Software 43Because the Screen driver is opened at startup and is never closed, and because there is nothing to read or write,

CHAPTER 4Software44 System SoftwarecsCode values:High-level call:Control(refNum: INTEGER; csCode: INTEGER; csParamPtr: Ptr) : OSErrStatus 4PBStatus (p

CHAPTER 5Internal Storage Devices 5Figure 5-0Listing 5-0Table 5-0

CHAPTER 5Internal Storage Devices46 Storage Device Slide-In BaysThis chapter describes the internal storage devices in the Macintosh LC 520 computer.

CHAPTER 5Internal Storage DevicesStorage Device Slide-In Bays 47Front Drive Bezel 5The front drive bezel has openings for access to removable media.

CHAPTER 5Internal Storage Devices48 Internal CD-ROM DriveConnector Adapters 5As Figure 5-1 illustrates, the Macintosh LC 520 computer uses special ada

CHAPTER 5Internal Storage DevicesInternal CD-ROM Drive 49Figure 5-4 Connector locations on the hard disk driveFigure 5-5 Dimensions of the CD-ROM driv

CHAPTER 5Internal Storage Devices50 Internal CD-ROM DriveMounting Method for the CD-ROM Drive 5Figure 5-6 shows the AppleCD 300i CD-ROM drive mounted

CHAPTER 5Internal Storage DevicesInternal CD-ROM Drive 51NoteThe AppleCD 300i CD-ROM drive connects to the internal SCSI bus. The drive does not have

APPENDIX General Information 53AppleCD 300i Specifications AThis Appendix describes the performance and capabilities of the AppleCD 300i drive, the int

APPENDIX AAppleCD 300i Specifications54 SpecificationsCD-ROMModes supported CD-ROM (Mode 1 and Mode 2), CD-ROM XA (Mode 2, Form 1 and Form 2), and CD-I

55IndexNumerals24-bit addressing 2332-bit addressing 23, 3868HC05 microcontroller 22Aabbreviations xi to xiiaccess to the logic board 4ADB (Apple Desk

INDEX56P, Qparameter RAM 22PDS (processor-direct slot) 10, 34PDS card 34addresses 35card select signal 35compatibility with Macintosh LC II 30connect

vii Figures and Tables Chapter 1 Introduction 1 Figure 1-1 Front view of the Macintosh LC 520 computer 4 Figure 1-2 Back view of the Macintosh LC 520

Foldouts 6Figure 6-0Listing 6-0Table 6-0

Expansion card design gui062-0487-BFOLDOUT 1

Expansion card component062-0487-BFOLDOUT 2

Expansion card assembly062-0487-BFOLDOUT 3

viii Chapter 5 Internal Storage Devices 45 Figure 5-1 Installation of the internal CD-ROM drive 46 Figure 5-2 Front drive bezel 47 Figure 5-3 Conne

ix PREFACE About This Note This developer note provides information about the Macintosh LC 520 computer, an integrated model with a built-in 14-inch