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D-14 Compaq AlphaServer ES40 Service Guide
D.7
Interrupt Summary Register (ISUM)
The interrupt summary register (ISUM) is a read-only register that
records all pending hardware, software, and AST interrupt requests
that have their corresponding enable bit set.
If a new interrupt (hardware, serial line, crd, or performance counters) occurs
simultaneously with an ISUM read, the ISUM read returns zeros. That
condition is normally assumed to be a passive release condition. The interrupt is
signaled again when the PALcode returns to native mode. The effects of this
condition can be minimized by reading ISUM twice and ORing the results.
31 0
FM-05849.AI
4
SL
63 32
CR
14 345
7
9
8
1011
PC[1:0]
SI[15:1]
ASTU
ASTS
ASTE
ASTK
630 29 28 13 2
333839
EI[5:0]
- AlphaServer ES40 1
- Contents 5
- Chapter 5 Error Logs 7
- Appendix C DPR Address Layout 9
- Appendix D Registers 9
- Examples 10
- Intended Audience 17
- Document Structure 17
- Documentation Titles 19
- Information on the Internet 19
- Chapter 1 21
- System Overview 21
- System Architecture 22
- System Enclosures 24
- Orientation) 26
- System Chassis—Rear View 27
- I/O Ports and Slots 28
- 2 3 4 5 6 30
- System Motherboard 32
- CPU Card 34
- 256 Data + 32 Check Bits 36
- Address Arrays 2 & 3 36
- Address Arrays 0 & 1 36
- Dual-Port RAM (DPR) 41
- ➋ +5 V Auxiliary 45
- Figure 1–13 System Fans 46
- Table 1–1 Fan Descriptions 47
- Removable Media Storage 48
- Hard Disk Drive Storage 49
- System Access 50
- Console Terminal 52
- Chapter 2 53
- Troubleshooting 53
- Questions to Consider 54
- Diagnostic Tables 55
- Table 2–1 Power Problems 56
- Table 2–4 Boot Problems 59
- Service Tools and Utilities 61
- 2.3.4 AlphaBIOS Menus 62
- 2.3.7 Crash Dumps 63
- Information Resources 65
- 2.4.4 Fail-Safe Loader 66
- 2.4.5 Software Patches 66
- 2.4.7 Supported Options 67
- Chapter 3 69
- Power-Up Diagnostics 69
- System Power-Up Sequence 71
- Power-Up Displays 74
- P00>>> 80
- 3.3.4 SRM Console Event Log 87
- Power-Up Error Messages 90
- 3.4.3 No MEM Error 94
- 3.4.4 RMC Error Messages 96
- 3.4.5 SROM Error Messages 98
- Figure 3–2 Function Jumpers 100
- Updating the RMC 102
- Chapter 4 105
- SRM Console Diagnostics 105
- Diagnostic Command Summary 106
- (Continued) 107
- Example 4–1 buildfru 108
- Example 4–2 more el 112
- Example 4–3 clear_error 114
- UNIX and OpenVMS systems 115
- Example 4–5 exer 120
- Example 4–6 floppy_write 125
- Example 4–7 grep 126
- Example 4–8 hd 128
- Arguments 129
- Example 4–9 info 0 130
- Example 4–10 info 1 131
- Example 4–11 info 2 132
- Example 4–12 info 3 133
- Example 4–13 info 4 134
- Example 4–15 memexer 136
- Example 4–16 memtest 138
- Example 4–18 nettest 145
- Example 4–20 show error 150
- ➊➋➌ ➍ ➎ ➏ 153
- ➊➋➌➍➎➏ ➐ 156
- Example 4–23 sys_exer 158
- Example 4–24 test -lb 160
- Chapter 5 163
- Error Logs 163
- 5.1.2 Invoking the GUI 166
- 5.1.3 Problem Found Report 168
- Fault Detection and Reporting 174
- Machine Checks/Interrupts 176
- AlphaServer 182
- Error Logs 5-25 187
- Error Logs 5-29 191
- Error Logs 5-31 193
- Chapter 6 195
- System Configuration 195
- and Setup 195
- System Consoles 196
- Example 6–1 set ocp_text 201
- (Continued) 207
- =Express ESC=Exit 216
- Setting Automatic Booting 218
- 6.7.2 Setting Up Serial Mode 225
- Setting SRM Security 229
- Example 6–3 set secure 230
- Example 6–4 clear password 230
- Setting Windows NT Security 232
- Configuring Devices 234
- 6.10.2 Memory Configuration 236
- Unstacked DIMMs 237
- Stacked DIMMs 237
- 6.10.3 PCI Configuration 240
- 10-Slot System 241
- 6-Slot System 241
- 00111222 242
- Chapter 7 247
- Using the Remote 247
- Management Console 247
- RMC Overview 248
- DPR Error Repository 249
- Remote Serial Terminal 250
- 7.2.1 Bypass Modes 252
- ➊ and a terminal is 255
- Connecting to the RMC CLI 256
- RMC Command-Line Interface 259
- Example 7–1 set com1_mode 261
- Example 7–2 status 262
- Field Meaning 263
- Example 7–3 env 264
- 7.6.4 Dumping DPR Data 266
- Example 7–5 power on/off 268
- Example 7–6 halt in/out 269
- Example 7–7 reset 269
- Example 7–10 set escape 275
- Troubleshooting Tips 278
- Chapter 8 281
- FRU Removal 281
- and Replacement 281
- Table 8–1 FRU List 282
- 8.1.1 Power Cords 285
- 8.1.2 FRU Locations 286
- Pedestal 290
- ➋ at the top and the 291
- V @ >240VA 296
- Power Supply 300
- ➍ out of the system 301
- Figure 8–10 Replacing Fans 302
- ➎ and ➏) or the PCI card cage 303
- ➊,➋,➌, and ➍) 303
- Hard Disk Drives 304
- Memory DIMMs 308
- Verification — SRM Console 311
- ➋ into the connector 313
- OCP Assembly 314
- Floppy Drive 318
- I/O Connector Assembly 320
- PCI Backplane 322
- ➊, if present 327
- Power Harness 330
- Appendix A 333
- SRM Console Commands 333
- SRM Console Commands A-3 335
- Appendix B 337
- Jumpers and Switches 337
- Figure B–2 TIG/SROM Jumpers 340
- Jumpers on PCI Board 344
- Setting Jumpers 346
- Appendix C 347
- DPR Address Layout 347
- Appendix D 359
- Registers 359
- Ibox Status Register (I_STAT) 360
- (MM_STAT) 362
- ECC_ERR_LD 364
- ECC_ERR_ST 364
- TPERR_P1 364
- TPERR_P0 364
- Cbox Read Register 366
- PC[63:32] 368
- PC[31:2] 368
- Register (IER_CM) 370
- PAL Base Register (PAL_BASE) 374
- Registers D-17 375
- Name Extent Type Description 375
- Ibox Control Register (I_CTL) 376
- Registers D-19 377
- Continued on next page 377
- Registers D-21 379
- Registers D-23 381
- Registers D-25 383
- PK1417-99 384
- (Continued) 386
- Register (DIRn, n=0,1,2,3) 387
- Access RW 390
- RAZ Rev0 391
- Check Logout Frames 395
- DPR 680 Fatal Registers 399
- Check Logout Frame 400
- Logout Frame 402
- (680 Correctable) 403
- Registers D-47 405
- Registers D-49 407
- Registers D-51 409
- Registers D-53 411
- Registers D-55 413
- Registers D-57 415
- Appendix E 417
- Isolating Failing DIMMs 417
- DIMM Isolation Procedure 419
- EV6 Single-Bit Errors 432
- SCSI breakouts, 1-9 441
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