Firmware Power-Up Diagnostics; Serial Rom Diagnostics - Digital Equipment 3300R Service Manual

Firmware Power-Up Diagnostics

After successful completion of AC and DC power-up sequences, the processor performs
diagnostics to verify system operation, loads the system console, and tests the core system
(CPU, memory, and system board), including all boot path devices. These tests are
performed as two distinct sets of diagnostics:
1. Serial ROM diagnostics—These tests check the basic functionality of the system and
load the console code from the FEPROM on the system board into system memory.
Failures during these tests are indicated by error beep codes (Table 2-1) and messages
in the console event log.
2. Console firmware diagnostics—These tests are executed by the console code. They
test the core system, including all boot path devices.
Failures during these tests are reported to the console terminal through the power-up
screen or console event log.

Serial ROM Diagnostics

The serial ROM diagnostics are loaded into the CPU's instruction cache from the serial
ROM on the CPU daughter board. The diagnostics test the system in the following order:
1. The CPU and backup cache on the CPU daughter board.
2. The CPU module's system bus interface.
3. The system bus to PCI bus bridge and system bus to EISA bus bridge. If the PCI
bridge or EISA bridge fails, an error beep code (3-3-1) sounds. Testing continues
despite these errors.
4. The onboard SCSI controller. If the controller fails, an error beep code (3-3-3) sounds.
5. First 32 Mbytes of memory. If the memory test fails, the failing bank is mapped out
and memory is reconfigured and re-tested. Testing continues until good memory is
found. If good memory is not found, an error beep code (1-3-3) is generated and the
power-up tests are terminated.
6. The data path to the FEPROM on the system board.
Power-Up Diagnostics and Display
DIGITAL Server 3300/3300R 2–25