Developer Note Macintosh Performa 6400 Computer © Apple Computer, Inc.
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.
Contents Figures and Tables Preface vii About This Note ix Contents of This Note ix Supplemental Reference Documents For More Information x Conventions and Abbreviations xi Typographical Conventions xi Standard Abbreviations xii Chapter 1 Introduction ix 1 Summary of Features 2 Comparison With Power Macintosh 5400 Computer External Features 5 Front View 5 Back View 6 Access to the Logic Board 6 Front Panel Push Button 7 Rear Panel Subwoofer Volume Control 7 Power On and Off 7 Optional Features 7 T
PowerPC 603eV Microprocessor Memory Subsystem 14 ROM 14 Second Level Cache (Optional) System RAM 16 Custom ICs 16 PSX IC 16 O’Hare IC 17 AWACS Sound IC 18 Cuda IC 19 Valkyrie-AR IC 19 Display RAM 20 Chapter 3 I/O Features 14 14 21 Serial I/O Ports 22 ADB Port 23 Disk Drives 24 Floppy Disk Drive 24 ATA (IDE) Hard Disk 25 Hard Disk Specifications 25 Hard Disk Connectors 27 Pin Assignments 27 ATA (IDE) Signal Descriptions 28 CD-ROM Drive 28 SCSI Bus 29 SCSI Connectors 29 SCSI Bus Termination 30 Sound 30
RAM DIMM Connectors 43 RAM Address Multiplexing 46 RAM Devices 47 RAM Refresh 47 RAM DIMM Dimensions 47 Level-2 Cache DIMM 49 PCI Expansion Slot 52 The DAV Connector 53 Pin Assignments 56 Signal Levels 57 Using the YUV Bus 58 Video Data Format 58 The PCI-Bus Communications Slot 59 PCI-Bus Communications Slot Connector Universal Serial Modem Card 62 Expansion Bay for SCSI Devices 66 Mechanical Specifications 66 Plastic Carrier 66 Expansion Bay Door 67 Connector Specifications 67 Power Connector 67 SCSI Conne
Figures and Tables Chapter 1 Chapter 2 Chapter 3 Chapter 4 Introduction 1 Figure 1-1 Figure 1-2 Front view of the computer Back view of the computer Table 1-1 Comparison with the Power Macintosh 5400 series computer Architecture 13 Figure 2-1 System block diagram I/O Features 21 Figure 3-1 Figure 3-2 Figure 3-3 Serial port sockets 22 Maximum dimensions of the hard disk Video timing diagram 36 Table 3-1 Table 3-2 Table 3-3 Table 3-4 Table 3-5 Table 3-6 Table 3-7 Table 3-8 Table 3-9 Table 3
Table 4-1 Table 4-2 Table 4-3 Table 4-4 Table 4-5 Table 4-6 Table 4-7 Table 4-8 Table 4-9 Table 4-10 Table 4-11 Table 4-12 Table 4-13 Table 4-14 viii Memory sizes and configurations 42 Pin assignments on the RAM DIMM connectors 43 RAM DIMM signals 46 Address multiplexing modes for various DRAM devices 46 Address multiplexing in noninterleaved banks 47 Pin and signal assignments for level-2 cache DIMM connector 49 Signal descriptions for level-2 cache DIMM connector 50 PCI signals 52 Pin assignments on the
P R E F A C E About This Note This developer note describes the Apple Macintosh Performa 6400 computer and emphasizes features that are new or different from previous Macintosh models. It is intended to help experienced Macintosh hardware and software developers design compatible products. If you are unfamiliar with Macintosh computers or would simply like more technical information, you may wish to read the related technical manuals listed in the section “Supplemental Reference Documents.
P R E F A C E For information about the digital video interface, refer to the SAA7140 Philips Desktop Video Handbook. Developers may also need copies of the appropriate Apple reference books. You should have the relevant books of the Inside Macintosh series. You should also have Designing PCI Cards and Drivers for Power Macintosh Computers. These books are available in technical bookstores and through the Apple Developer Catalog.
P R E F A C E Conventions and Abbreviations 0 This developer note uses the following typographical conventions and abbreviations. Typographical Conventions 0 New terms appear in boldface where they are first defined. Computer-language text—any text that is literally the same as it appears in computer input or output—appears in Courier font. Hexadecimal numbers are preceded by a dollar sign ($). For example, the hexadecimal equivalent of decimal 16 is written as $10.
P R E F A C E Standard Abbreviations 0 When unusual abbreviations appear in this book, the corresponding terms are also spelled out. Standard units of measure and other widely used abbreviations are not spelled out. Here are the standard units of measure used in this developer note: A amperes mA milliamperes dB decibels µA microamperes GB gigabytes MB megabytes Hz hertz MHz megahertz in.
P R E F A C E IR infrared LS TTL low-power Schottky TTL (a standard type of device) MMU memory management unit MOS metal-oxide semiconductor NTSC National Television Standards Committee (the standard system used for broadcast TV in North America and Japan) NMI nonmaskable interrupt PAL Phase Alternating Line system (the standard for broadcast TV in most of Europe, Africa, South America, and southern Asia) PCI Peripheral Component Interconnect PDS processor-direct slot PWM pulse-width mod
C H A P T E R Figure 1-0 Listing 1-0 Table 1-0 1 Introduction 1
C H A P T E R 1 Introduction The Macintosh Performa 6400 computer is a new Macintosh model that incorporate a PowerPC™ 603e microprocessor running at 160, 180, and 200 MHz, a second-level cache expansion slot, two Peripheral Component Interconnect (PCI) card expansion slots, enhanced AV features (audio and video input and output), and a new PCI-based communications slot (comm slot II).
C H A P T E R 1 Introduction ■ Processor bus: 64-bit wide, 40 MHz, supporting split address and data tenures. ■ Standard Macintosh I/O ports: two serial ports, sound input and output jacks, a SCSI port, and an ADB port. ■ GeoPort: supported on both the modem and printer port. ■ PCI-based communications slot: a 112-pin connector accepts an optional modem or ethernet interface. This is the same type of communications slot found in the Power Macintosh 5400 computer.
C H A P T E R 1 Introduction Table 1-1 4 Comparison with the Power Macintosh 5400 computer (continued) Features Power Macintosh 5400 Macintosh Performa 6400 Video RAM 1 MB (DRAM) 1 MB (DRAM) Video input Optional card for video input, capture, and overlay Optional card for video input, capture, and overlay Video output Built-in 15-inch display; Optional mirror connector supports an external monitor operating in mirror mode; built-in video supports up to 832-by-624 pixel resolution at 8 bits p
C H A P T E R 1 Introduction External Features 1 The Performa 6400 computer has a new tower design featuring more clearance at the bottom of the enclosure to provide better cooling and enhance the low frequency sound quality of a small built-in subwoofer. The tower also includes an expansion bay at the top of the enclosure for addtional SCSI devices. Front View 1 Figure 1-1 is a front view of a Performa 6400 computer.
C H A P T E R 1 Introduction Back View 1 The back panel includes the power socket, the monitor power socket, the standby power button, the I/O ports, and the openings for I/O access to the expansion modules: the I/ O expansion card, the communications card, and the video input card. Figure 1-2 shows the back view of a Performa 6400 computer.
C H A P T E R 1 Introduction Volume Control 1 The Macintosh Performa 6400 computer has a push button on the front panel to control the sound volume of the internal speaker. Sound volume can also be controlled with the Sound component of the Monitors and Sound control panel. A knob located below the monitor port on the back of the computer controls the low frequency volume of the subwoofer.
C H A P T E R 1 Introduction The features of the FM radio tuner are ■ the ability to receive and display FM radio frequencies ■ the ability to scan and search stations up and down the frequency spectrum ■ step frequency ■ a DX mode to tune out harmonic spillover from other stations ■ a stereo/mono station indicator ■ preset station programming The TV and FM radio tuner module is available in versions for NTSC, PAL, and SECAM television systems. The TV picture appears in its own window.
C H A P T E R 1 Introduction The software allows the user to capture or freeze a single frame of video or record a segment of video as a QuickTime Movie. The TV window cannot be resized while the computer is recording a movie. Video Input 1 The optional video input card accepts video from an external source and displays the video in a window on the computer’s display.
C H A P T E R 1 Introduction other external devices, such as a VCR, without an optional video out card. For more information, see the section “The DAV Connector” beginning on page 53. Communications 1 The main logic board in the Macintosh Performa 6400 computer has a communications slot that allows the computer to support a communications module without occupying one of the PCI expansion slots. A communications card can be installed by either the user or the dealer.
C H A P T E R 1 Introduction DAV Slot 1 The digital audio video (DAV) slot in the Macintosh Performa 6400 computer is compatible with Power Macintosh 5400, 7600, 8500, and 9500 computers. However, it is not compatible with the DAV slot in the Macintosh Quadra 660AV, Macintosh Quadra 840AV, Power Macintosh 6100, 7100, and 8100 computers, nor is it direct plug-in compatible with the DVA (digital video application) slot in the Power Macintosh 5200 and 6200 computers.
C H A P T E R 1 Introduction IMPORTANT The JEDEC MO-161 specification shows three possible heights for the 8-byte DIMM. For Power Macintosh computers, developers should use only the shortest of the three: 1.100 inches. Taller DIMMs put excessive pressure on the DIMM sockets due to mechanical interference inside the case. ▲ Cache Expansion 1 On the Macintosh Performa 6400 computer, the optional 256K L2 cache includes an integrated cache controller.
C H A P T E R Figure 2-0 Listing 2-0 Table 2-0 2 Architecture 2
C H A P T E R 2 Architecture This chapter describes the architecture of the Macintosh Performa 6400 computer. It describes the major components of the main logic board: the microprocessor, the custom ICs, and the display RAM. It also includes a simplified block diagram. Block Diagram and Main ICs 2 The architecture of the Macintosh Performa 6400 computer is based on the PowerPC 603e. Figure 2-1 shows the system block diagram.
C H A P T E R 2 Architecture Figure 2-1 System block diagram Address 32 Data 64 Second-level cache slot 603e PowerPC ROM 4 MB Processor clock Bus clock 8 MB RAM soldered on PSX ASIC Valkyrie-AR video/graphics controller 2 DRAM DIMMs 1 MB video DRAM RGB to monitor Video clock PCI clocks PCI slots 7140 scaler Video-in board plugs into video slot TEA 6330 Clock generator PCI bus 33 MHz Sound clock DAV slot 7110 decoder RCA sound jacks S video jack RCA video jack 33 MHz Communications sl
C H A P T E R 2 Architecture System RAM 2 The Macintosh Performa 6400 computer has 8 MB of DRAM memory soldered on the main logic board. All RAM expansion is provided by DRAM devices on 8-byte JEDEC-standard DIMMs (dual inline memory modules). Two 168-pin DIMM sockets are used for memory expansion. Available DIMM sizes are 8, 16, 32, and 64 MB. The DIMM sockets support both single- and double-sided DRAM modules. The PSX custom IC provides memory control for the system RAM.
C H A P T E R 2 Architecture The PCI bus bridge in the PSX IC runs asynchronously so that the processor bus and the PCI bus can operate at different rates. The processor bus operates at a clock rate of 40 MHz and the PCI bus operates at 33 MHz. The PCI bus bridge generates PCI parity as required by the PCI bus specification, but it does not check parity or respond to the parity error signal.
C H A P T E R 2 Architecture the PCI bus architecture. It provides power management control functions for Energy Star–compliant features included in the Macintosh Performa 6400 computer. The O’Hare IC is connected to the PCI bus and uses the 33 MHz PCI bus clock. The O’Hare IC includes circuitry equivalent to the IDE, SCC, SCSI, sound, SWIM3, and VIA controller ICs.
C H A P T E R 2 Architecture ■ the ADB interface ■ management of system resets ■ management of the real-time clock ■ on/off control of the power supply (soft power) ■ the programming interface to devices on the IIC (interintegrated circuit) bus The devices on the IIC bus include the AWACS sound IC, the digital video decoder and scaler (DESC) on the video input module, and the Cyclops IC, which is the controller for the remote control receiver.
C H A P T E R 2 Architecture Display RAM 2 The display memory in the Macintosh Performa 6400 computer is separate from the main memory. To reduce the cost of the computer, the display memory is implemented with DRAM devices instead of more expensive VRAM devices. The display memory consists of 1 MB of 60 nanosecond (ns) DRAM devices configured to make a 32-bit data bus. The display memory cannot be expanded. The display memory contains three separate frame buffers.
C H A P T E R Figure 3-0 Listing 3-0 Table 3-0 3 I/O Features 3
C H A P T E R 3 I/O Features This chapter describes both the built-in I/O devices and the interfaces for external I/O devices. It also describes the types of external video monitors that can be used with the Macintosh Performa 6400 computer. Serial I/O Ports 3 The Macintosh Performa 6400 computer has two serial ports, one for a printer and one for a modem. Both serial ports have 9-pin mini-DIN sockets that accept either 8-pin or 9-pin plugs. Both serial ports support the GeoPort serial protocol.
C H A P T E R 3 I/O Features Pin 9 on each serial connector provides +5 V power from the ADB power supply. An external device should draw no more than 100 mA from that pin. The total current available for all devices connected to the +5 V supply for the ADB and the serial ports is 500 mA. Excessive current drain will cause a fuse to interrupt the +5 V supply; the fuse automatically resets when the load returns to normal. Both serial ports include the GPi (general-purpose input) signal on pin 7.
C H A P T E R 3 I/O Features Disk Drives 3 The Macintosh Performa 6400 computer has one internal high-density floppy disk drive, one internal ATA (IDE) hard disk drive, and an internal SCSI CD-ROM drive. Floppy Disk Drive 3 The Macintosh Performa 6400 computer has one internal high-density floppy disk drive (Apple SuperDrive). The drive is connected to a 20-pin connector on a cable that is connected to the main logic board by the internal chassis connector.
C H A P T E R 3 I/O Features Table 3-3 Pin assignments on the floppy disk connector (continued) 17 +12V +12 volts 18 WR Write data 19 +12V +12 volts 20 n.c. Not connected ATA (IDE) Hard Disk 3 The Macintosh Performa 6400 computer has an internal hard disk that uses the standard ATA-2 interface. This interface, used for ATA drives on IBM AT–compatible computers, is also referred to as the IDE interface.
C H A P T E R 3 I/O Features Maximum dimensions of the hard disk IDE connector Power 25.4 (1.00) Figure 3-2 A A Mounting hole 6-32, .22" min. full thread, 4X B 44.40 (1.75) 3 60.30 (2.37) 60.00 (2.36) 2x 101.6 (4.00) 2x 146.0 (5.75) 6.40 (.252)2x 16.00 (.63) 2x Mounting hole 6-32, through 6x 3.20 (.125) 2 95.25 (3.75) 101.6 (4.
C H A P T E R 3 I/O Features Hard Disk Connectors 3 The internal hard disk has a standard 40-pin ATA connector and a separate 4-pin power connector. The 40-pin connector cable is part of the cable harness attached to the main logic board by the internal chassis connector. The power cable is attached directly to the power supply.
C H A P T E R 3 I/O Features ATA (IDE) Signal Descriptions 3 Table 3-5 describes the signals on the ATA (IDE) hard disk connector. Table 3-5 Signal name Signals on the ATA (IDE) hard disk connector Signal description DA(0–2) ATA device address; used by the computer to select one of the registers in the ATA drive. For more information, see the descriptions of the CS0 and CS1 signals. DD(0–15) ATA data bus; buffered from IOD(16–31) of the computer’s I/O bus.
C H A P T E R 3 I/O Features second and a data buffer that further enhances performance. Table 3-6 is a summary of the specifications of the CD-ROM drive.
C H A P T E R 3 I/O Features Table 3-7 Pin assignments for the SCSI connectors (continued) Pin number (internal 50-pin) Pin number (external 25-pin) Signal name Signal description 16 13 /DB7 Bit 7 of SCSI data bus 18 20 /DBP Parity bit of SCSI data bus 25 – n.c.
C H A P T E R 3 I/O Features records sound from several sources: a microphone connected to the sound input jack, the video input module, or a compact disc in the CD-ROM player. With each sound input source, sound playthrough can be enabled or disabled. Sound Output 3 The Macintosh Performa 6400 computer has one built-in speaker/subwoofer and two sound output jacks, one on the front and one on the back.
C H A P T E R 3 I/O Features Routing of the Sound Signals 3 All audio sources are routed to the AWACS custom IC. The AWACS IC can enable the input sources in two groups: the sound input jack (external microphone) or (CD-ROM, TV/FM tuner, modem, DAV card, cross-platform card). Digitizing Sound 3 The Macintosh Performa 6400 computer digitizes and records sound as 16-bit samples.
C H A P T E R 3 I/O Features Note The user must hold down a key combination for at least 1 second to allow the ADB microcontroller enough time to respond to the NMI or hard-reset signal. ◆ Table 3-8 Reset and NMI key combinations Key combination Function Command-Power (x-p) NMI (always active) Control-Command-Power (Control-x-p) Reset Note The NMI function can always be activated from the keyboard.
C H A P T E R 3 I/O Features Table 3-9 Pin assignments for the external video connector (continued) Pin number Signal name Description 5 GRN.VID Green video signal 6 GRN.GND Green video ground 7 SENSE1 Monitor sense signal 1 9 BLU.VID Blue video signal 10 SENSE2 Monitor sense signal 2 11 GND CSYNC and VSYNC ground 12 /VSYNC Vertical synchronization signal 13 BLU.GND Blue video ground 14 HSYNC.
C H A P T E R 3 I/O Features Video Timing Parameters 3 The Macintosh Performa 6400 computer supports several different types of monitors and screen sizes, as listed in Table 3-10.
C H A P T E R 3 I/O Features Figure 3-3 Video timing diagram Horizontal timing White Video Black H sync space H image space HBLANK H line length /HSYNC H back porch H sync pulse H front porch Vertical timing White Video Black V sync space V image space VBLANK V line length /VSYNC V back porch V sync pulse V front porch 36 Video Timing Parameters
C H A P T E R 3 I/O Features Table 3-13 lists the timing parameters for the smaller monitors listed: the 12-inch color monitor, the 14-inch color monitor, and a standard VGA monitor. Table 3-12 Video timing parameters for smaller monitors Monitor type and dimensions Parameter 12-inch color (512 by 384) 14-inch color (640 by 480) VGA (640 by 480) Dot clock 15.67 MHz 30.24 MHz 25.18 MHz Dot time 63.83 ns 33.07 ns 39.72 ns Line rate 24.48 kHz 35.00 kHz 31.47 kHz Line time 40.
C H A P T E R 3 I/O Features Table 3-13 lists the timing parameters for SVGA monitors running at 60 and 72 frames per second and for the 16-inch color monitor. Table 3-13 Video timing parameters for larger monitors Monitor type and dimensions 38 Parameter SVGA (800 by 600 at 60 frames per second) SVGA (800 by 600 at 72 frames per second) 16-inch color (832-by-624) Dot clock 40.00 MHz 50.00 MHz 57.2832 MHz Dot time 25.00 ns 20.00 ns 17.46 ns Line rate 37.88 kHz 48.08 kHz 49.
C H A P T E R 3 I/O Features Table 3-14 lists the timing parameters for EVGA monitors running at 60 and 70 frames per second. Table 3-14 Video timing parameters for 1024-by-768 EVGA monitors Monitor type and dimensions Parameter EVGA (1024 by 768 at 60 frames per second) EVGA (1024 by 768 at 70 frames per second) Dot clock 65.0 MHz 75.0 MHz Dot time 15.38 ns 13.33 ns Line rate 48.36 kHz 56.48 kHz Line time 20.68 µs (1344 dots) 17.
C H A P T E R Figure 4-0 Listing 4-0 Table 4-0 4 Expansion Features 4
C H A P T E R 4 Expansion Features This chapter describes the expansion features of the Macintosh Performa 6400 computer: the RAM expansion slot, the L2 cache expansion slot, the PCI expansion slot, the DAV connector on the video input module, the communications slot, and the expansion bay for SCSI devices.
C H A P T E R 4 Expansion Features The 8-byte DIMMs can be installed one or more at a time. The Macintosh Performa 6400 computer supports only linear memory organization, therefore no performance gains are seen when two DIMMs of the same size are installed. Any size DIMM can be installed in either DIMM slot, and the combined memory of all of the DIMMs installed will be configured as a contiguous memory space. RAM DIMM Connectors 4 Table 4-2 gives the pin assignments for the RAM DIMM connectors.
C H A P T E R 4 Expansion Features Table 4-2 Pin number Pin assignments on the RAM DIMM connectors (continued) Signal name Pin number Signal name 24 Reserved 108 Reserved 25 Reserved 109 Reserved 26 VCC 110 VCC 27 /WE(0) 111 Reserved 28 /CAS(0) 112 /CAS(1) 29 /CAS(2) 113 /CAS(3) 30 /RAS(0) 114 /RAS(1) 31 /OE(0) 115 Reserved 32 VSS 116 VSS 33 A(0) 117 A(1) 34 A(2) 118 A(3) 35 A(4) 119 A(5) 36 A(6) 120 A(7) 37 A(8) 121 A(9) 38 A(10) 122 A(11)
C H A P T E R 4 Expansion Features Table 4-2 Pin number Pin assignments on the RAM DIMM connectors (continued) Signal name Pin number Signal name 55 DQ(18) 139 DQ(50) 56 DQ(19) 140 DQ(51) 57 DQ(20) 141 DQ(52) 58 DQ(21) 142 DQ(53) 59 VCC 143 VCC 60 DQ(22) 144 DQ(54) 61 Reserved 145 Reserved 62 Reserved 146 Reserved 63 Reserved 147 Reserved 64 Reserved 148 Reserved 65 DQ(23) 149 DQ(55) 66 Reserved 150 Reserved 67 DQ(24) 151 DQ(56) 68 VSS 152 VSS 6
C H A P T E R 4 Expansion Features Table 4-3 describes the signals on the RAM DIMM connector.
C H A P T E R 4 Expansion Features Table 4-5 shows how the address signals to the RAM devices are multiplexed during the row and column address phases for noninterleaved banks.
C H A P T E R 4 Expansion Features Figure 4-1 Dimensions of the RAM DIMM 27.94 (1.1) maximum + + Optional holes 2XO / 3.00 ± 0.10 (0.118 ± 0.004) Optional tabs 11.43 (0.450) 10 11 115.57 (4.550) 36.83 (1.450) 138.32–138.58 (5.445–5.456) Component area 43.18 (1.700) 40 41 3.175 (0.125) 133.22–133.48 (5.245–5.255) 127.35 (5.01) 54.61 (2.150) 84 + 4.00 (0.157) minimum 3.00 (0.118) 1.27 ± 0.10 (0.50 ± 0.004) 17.78 (0.700) Note: Dimensions are in millimeters (inches). 48 RAM DIMMs 4.00 ± 0.
C H A P T E R 4 Expansion Features Second-Level Cache DIMM 4 The Macintosh Performa 6400 computer has a slot for a second-level (L2) cache on a DIMM. The L2 cache DIMM contains the cache controller, tag, and data-store memory. It is a lookaside cache, which is connected to the PowerPC processor bus. Several signals are also included to control cache operation. These signals include /L2_DIS, /MEM_INHIBIT, /L2_BR, /L2_BG, and L2_PRSNT.
C H A P T E R 4 Expansion Features Table 4-6 Pin and signal assignments for the L-2 cache DIMM connector (continued) Pin Signal name Pin Signal name Pin Signal name Pin Signal name 21 /L2_BR 61 +3.3 V 101 /TBST 141 SHD 22 /L2_BG 62 D15 102 GND 142 D47 23 TC0 63 D14 103 /CI 143 D46 24 TC1 64 D13 104 /RSRV 144 GND 25 +3.
C H A P T E R 4 Expansion Features Table 4-7 Signal descriptions for the L-2 cache DIMM connector (continued) Signal name Description /AACK Address acknowledge, same as AACK_ signal on PowerPC 603 /ARTRY Address retry, same as ARTRY_ signal on PowerPC 603 /ABB Address bus busy, same as ABB_ signal on PowerPC 603 /CI Cache inhibit, same as CI_ signal on PowerPC 603 /CPU_BG Bus transaction granted, same as BG_ signal on PowerPC 603 /CPU_BR Bus transaction requested, same as BR_ signal on Pow
C H A P T E R 4 Expansion Features PCI Expansion Slot 4 The Macintosh Performa 6400 computer uses the industry-standard peripheral component interconnect (PCI) bus for an I/O expansion bus. The PCI bus is a 32-bit multiplexed address and data bus. The PCI expansion slot has a 33.33 MHz system clock. PCI I/O expansion cards are mounted horizontally in a 90-degree straight-through adapter board, which is installed in the PCI expansion slot on the main logic board.
C H A P T E R 4 Expansion Features Table 4-8 PCI signals (continued) Signal name Description RST# Reset; used to bring registers and signals to a known state INTA#, INTB#, INTC#, INTD# Interrupt request pins; wired together on each slot LOCK# Lock; indicates an operation that may require multiple transactions to complete PERR# Parity error; used to report data parity errors during PCI transactions excluding a Special Cycle transaction SERR# System error; used to report address parity errors,
C H A P T E R 4 Expansion Features Figure 4-2 B 6.3 [0.25] DAV connecting cable Key 45° B 108.7 [4.28] 177.8 [7.00] Fold option A 63.8 A [2.51] PIN 1 (red stripe) Key 10.0 A [0.39] Fold option B Note: Dimensions are in millimeters [inches]. Cable fold option A, shown in Figure 4-2, is used for tower and mini-tower models such as the Power Macintosh 7500 and 8500; fold option B is used in the Macintosh Performa 6400 and all-in-one models such as the Power Macintosh 5400.
C H A P T E R 4 Expansion Features Note The interface of the 60-pin DAV connector is a superset of the interface on the 34-pin DVA connector on the Power Macintosh 5200, Power Macintosh 6200, and Macintosh Quadra 630 computers. An adapter cable is provided with the Macintosh Performa 6400 video-in cards to connect 34-pin DVA compatible cards developed for the Power Macintosh 5200 and 6200 computers to the new 60-pin DAV connector.
C H A P T E R 4 Expansion Features DAV Connector Pin Assignments 4 The DAV connector on the video-in card for the Macintosh Performa 6400 computer is a 60-pin dual-row type with 0.100-inch pin spacing. The pin assignments on the DAV connector are shown in Table 4-9.
C H A P T E R 4 Expansion Features Table 4-9 Pin assignments on the DAV connector (continued) Pin number Signal name Pin number Signal name 53 Ground 54 N.C. 55 VID_RET 56 N.C. 57 VID_RET 58 N.C. 59 N.C. 60 N.C. Table 4-10 gives descriptions of the signals on the DAV connector.
C H A P T E R 4 Expansion Features Table 4-11 DAV signal levels (continued) Specification Minimum Maximum Input current drain ± 20 µA Output voltage low 0.4 V Output voltage high Output current Using the YUV Bus 3.5 V ± 400 µA 4 The video input module contains a digital video decoder and scaler (DESC), the Philips SAA7140 IC. Logic on the video input card uses the CVBS port on the DESC and pulls the FLD signal low, disabling the YUV bus.
C H A P T E R 4 Expansion Features Figure 4-5 Video data timing Start of a video line LLCLK vdcCREFB HREF Y 7–0 Y0 Y1 Y2 Y3 Y4 Y5 UV 7–0 U0 V0 U2 V2 U4 V4 Y and UV data valid on the rising edge of LLCLK when HREF and CREFB are high End of a video line LLCLK vdcCREFB HREF Y 7–0 Yn-5 Yn-4 Yn-3 Yn-2 Yn-1 Yn UV 7–0 Un-5 Vn-5 Un-3 Vn-3 Un-1 Vn-1 The PCI Bus Communications Slot 4 The main logic board has a separate slot for an optional communications card.
C H A P T E R 4 Expansion Features PCI Bus Communications Slot Connector 4 The PCI bus based communications slot connector is a 112-pin half-height microchannel connector. A communications card mounts vertically in the connector and its I/O connector is accessed through the communications port access hole on the right hand side of the back panel. The size constraints of a communications card are 1.57 inches (40 mm) wide by 6 inches (152 mm) long. A maximum of 2.
C H A P T E R 4 Expansion Features Table 4-12 Pin assignments for the PCI bus communications slot connector (continued) Odd-numbered pins Even-numbered pins Function 35 A8 Function 36 C/BE(0)~ 37 A10 38 A9 39 GND 40 GND 41 A12 42 A11 43 A14 44 A13 45 C/BE(1)~ 46 A15 47 GND 48 Gnd 49 SERR~ 50 PAR 51 PERR~ 52 SBO~ 53 LOCK~ 54 SDONE 55 +3.3 V 56 +3.
C H A P T E R 4 Expansion Features Table 4-12 Pin assignments for the PCI bus communications slot connector (continued) Odd-numbered pins Function Even-numbered pins 97 Reserved 98 99 GND 100 Reserved‘ 101 CLK 102 Reserved 103 GND 104 Reserved 105 Reserved 106 Reserved 107 Reserved 108 Reserved 109 CommGnd 110 RefGnd 111 AudToSlot 112 AudFromSlot Universal Serial Modem Card Function RST~ 4 The PCI bus communications slot (comm slot II) in the Macintosh Performa 640
C H A P T E R 4 Expansion Features However, the signals on comm slot II in the Macintosh Performa 6400 computer are configured to make it possible to design a universal communications slot card that works in both comm slots if access to the parallel bus is not required (for example, a serial modem card).
same as those on the PCI bus communications slot, listed in Table 4-12, with the PCI bus signals removed and the key slot location added.
C H A P T E R 4 Expansion Features Table 4-13 Pin assignments for a universal serial modem card (continued) Odd-numbered pins Function Even-numbered pins Function 57 Not connected 58 Not connected 59 Not connected 60 Not connected 61 Not connected 62 +5 V 63 Not connected 64 Not connected 65 Not connected 66 Not connected 67 Not connected 68 Not connected 69 Not connected 70 Not connected 71 Not connected 72 Not connected 73 Not connected 74 Not connected 75 GND
C H A P T E R 4 Expansion Features Expansion Bay for SCSI Devices 4 The expansion bay in the Macintosh Performa 6400 computer supports the addition of SCSI devices. The electrical and mechanical guidelines for utilizing the expansion bay are defined in this section. Mechanical Specifications 4 The expansion bay, shown in Figure 4-8, is located at the top of the Macintosh Performa 6400 enclosure. It accomodates a wide range of SCSI devices with a maximum width of 5.25-inch (152.
C H A P T E R 4 Expansion Features the mounting holes on the SCSI device. The SCSI device with carrier slides into the enclosure and snaps into place on the carrier guide. Expansion Bay Door 4 The plastic expansion bay door (Apple part number 815-2344, manufactured by Li Xin Plastic Industries, AppleLink LI.
C H A P T E R 4 Expansion Features SCSI Connector The SCSI connector inside the expansion bay is a 50-pin unshielded, shrouded, keyed SCSI connector. The pin assignments are the same as those listed in Table 3-7 on page 29 for the 50-pin internal SCSI connector. A terminator is also included on the cable.
Index A abbreviations xii to xiii ADB (Apple Desktop Bus) port 23 ADB connector 23 ADB controller 18 Apple SuperDrive 24 ATA (IDE) hard disk 12, 25 to 28 connectors and pin assignments 27 dimensions 25 signals 28 specifications 25 AWACS custom IC 18 B back view 6 big-endian addressing 17 block diagram 15 C cache expansion 12 CD-ROM drive 28 clock speed 14 color lookup table (CLUT) 19 communications modules 10 communications slot 59 compatibility ATA (IDE) hard disk 12 communications slot 10 DAV slot 11 L2
I N D E X access to 6 M, N MC68HC05 microcontroller 18 memory sizes and configurations of 42 subsystem 14 memory control IC.
T H E A P P L E P U B L I S H I N G This Apple manual was written, edited, and composed on a desktop publishing system using Apple Macintosh computers and FrameMaker software. Proof pages were created on an Apple LaserWriter IINTX printer. Final pages were created on the Varityper VT600 imagesetter. Line art was created using Adobe™ Illustrator. PostScript™, the page-description language for the LaserWriter, was developed by Adobe Systems Incorporated.
