System Overview
1-21
Dual-Port RAM (DPR)
The ES40 system features a dual-port RAM—RAM that is shared between the
RMC and the system motherboard logic—to ease communication between the
system and the RMC. This book refers to the dual-port RAM as the DPR.
The RMC reads 256 bytes of data from each FRU EEPROM at power-up and
stores it in the DPR. This data contains configuration and possibly error log
information. The data is accessible via the TIG chip to the firmware for
configuration information during start-up. Remote or local applications can read
the error log and configuration information. The error log information is
written to the DPR by Compaq Analyze (see Chapter 5) and then written back
to the EEPROMs by the RMC. This ensures that the error log is available on a
FRU after power has been lost.
•
Section 1.10.1 describes the SPC logic.
•
Section 1.10.2 describes the RMC logic.
Содержание AlphaServer ES40
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Страница 170: ...5 8 Compaq AlphaServer ES40 Service Guide Figure 5 4 FRU List Designator ...
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Страница 193: ...Error Logs 5 31 Figure 5 14 Deleting an Old Error Frame ...
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Страница 292: ...8 12 Compaq AlphaServer ES40 Service Guide Figure 8 4 Enclosure Panel Removal Pedestal 1 2 PK0234 ...
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Страница 299: ...FRU Removal and Replacement 8 19 Figure 8 8 Covers on the System Chassis Pedestal Rack PK0215 1 4 5 3 2 1 2 ...
Страница 300: ...8 20 Compaq AlphaServer ES40 Service Guide 8 5 Power Supply Figure 8 9 Removing a Power Supply 5 4 3 2 PK0232a 1 ...
Страница 302: ...8 22 Compaq AlphaServer ES40 Service Guide 8 6 Fans Figure 8 10 Replacing Fans Unlock Lock 5 6 1 2 3 4 PK0208 ...
Страница 304: ...8 24 Compaq AlphaServer ES40 Service Guide 8 7 Hard Disk Drives Figure 8 11 Removing a Hard Drive PK0938a 1 2 ...
Страница 310: ...8 30 Compaq AlphaServer ES40 Service Guide Figure 8 14 Aligning DIMM in MMB PK0953a ...
Страница 314: ...8 34 Compaq AlphaServer ES40 Service Guide 8 11 OCP Assembly Figure 8 16 Removing the OCP Assembly 1 2 PK0282 ...
Страница 318: ...8 38 Compaq AlphaServer ES40 Service Guide 8 13 Floppy Drive Figure 8 18 Removing the Floppy Drive 1 2 3 4 4 5 PK0281 ...
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