Digital Equipment Corporation VAXstation 4000 Model 90 Service Information EK-KA490-SV. A01 Digital Equipment Corporation First Edition, August 1992 The information in this document is subject to change without notice and should not be construed as a commitment by Digital Equipment Corporation. Digital Equipment Corporation assumes no responsibility for any errors that may appear in this document. The software described in this document is furnished under a license and may be used or copied only in accordance with the terms of such license. No responsibility is assumed for the use or reliability of software on equipment that is not supplied by Digital Equipment Corporation or its affiliated companies. Restricted Rights: Use, duplication, or disclosure by the U. S. Government is subject to restrictions as set forth in subparagraph ( c ) ( 1 ) ( ii ) of the Rights in Technical Data and Computer Software clause at DFARS 252.227–7013. Copyright © by Digital Equipment Corporation 1992 All Rights Reserved. Printed in U.S.A. The following are trademarks of Digital Equipment Corporation: DEC, DIGITAL, MicroVAX, MicroVMS, ThinWire, TURBOchannel, ULTRIX, VAX, VMS, and the DIGITAL logo. Contents Preface 1 System Module Introduction . 1–1 System Overview . 1–2 Central Processor Unit . 1–5 Interrupts and Exceptions . 1–14 Cache Memory . 1–20 Main Memory System . 1–24 ROM Memory . 1–25 Graphics Controller . 1–26 Network Interface Controller . 1–28 Serial Line Controller . 1–29 Time-of-Year Clock . 1–30 SCSI Controller . 1–31 DSW21 Synchronous Communications Adapter . 1–33 2 Firmware Overview . 2–1 Power-Up Initialization Code . 2–2 Console Mode . 2–5 Extended Self-Test . 2–6 Utilities . 2–8 System Test . 2–10 System ROM . 2–11 Option ROM . 2–16 Configuration Table . 2–20 Driver Descriptor . 2–27 Interfacing to Diagnostic Drivers . 2–29 Console Driver Interface . 2–31 3 System Configuration Overview . 3–1 System Box . 3–2 4 Using the Console Overview . 4–1 Contents–iii System Console Commands . 4–2 Alternate Consoles . 4–25 5 Diagnostic Testing Overview . 5–1 Diagnostic Functions . 5–3 System Power-Up Test . 5–4 Displaying System Configuration . 5–8 Displaying Additional Error Information . 5–12 Setting Up the Diagnostic Environment . 5–13 Device Tests . 5–15 Self-Test Descriptions . 5–19 System Test Environment Configuration . 5–31 System Test Monitor . 5–32 Utilities . 5–43 MIPS/REX Emulator . 5–53 Product Fault Management . 5–56 Using MOP Ethernet Functions . 5–84 User Environmental Test Package . 5–88 FEPROM Firmware Update . 5–91 Updating Firmware On Tape . 5–98 6 FRUs Removal and Replacement Overview . 6–1 Precautions . 6–2 System FRU Removal . 6–3 System Preparation . 6–5 Mass Storage Drive Removal . 6–8 Power Supply Removal . 6–21 Module Removal . 6–23 SPXg 8-Plane Option . 6–28 SPXgt 24-Plane Option . 6–34 CPU Module . 6–39 DSW21 Removal and Replacement . 6–41 Bezel Removal . 6–42 Clearing System Password . 6–47 Testing the VAXstation 4000 Model 90 System . 6–48 TURBOchannel Option . 6–50 Shipping Contents . 6–51 TURBOchannel Adapter and Option Modules . 6–54 Contents–iv Installing the TURBOchannel Option . 6–55 TURBOchannel Specifications . 6–63 Appendix A Diagnostic Error Codes Overview . A–1 Error Messages . A–3 Self-Test Error Messages . A–8 System Test Error Messages . A–84 Utility Error Messages ..