Console Firmware Diagnostics - Digital Equipment 3300R Service Manual

Power-Up Diagnostics and Display
7. The console program is loaded into memory from the FEPROM on the system board.
A checksum test is executed for the console image. If the checksum test fails, an error
beep code (1-1-4) is generated, the power-up tests are terminated, and the fail-safe
loader is activated.
If the checksum test passes, a single audible beep is issued, control is passed to the console
code, and the console firmware diagnostics are run.

Console Firmware Diagnostics

Console firmware tests are executed once control is passed to the console code in memory.
The console firmware is loaded from the FEPROM on the system motherboard during
power-up. They check the system in the following order:
1. Perform a complete check of system memory.
2. Steps 2 to 5 may be completed in parallel.
3. Start the I/O drivers for mass storage devices and tapes. A complete check of the
machine is made. After the I/O drivers are started, the console program continuously
polls the bus for devices (approximately every 20 or 30 seconds).
4. Check that EISA configuration information is present in NVRAM for each EISA
module detected and that no information is present for modules that have been
removed.
5. Run exercisers on the drives seen by the system.
NOTE: This step does not ensure that all disks in the system will be tested or that
any device drivers will be completely tested. Spin-up time varies for
different drives, so not all disks may be online. To ensure complete testing
of disk devices, use the test command (see the section "Command
Reference" in Chapter 3).
6. Enter console mode or boot the operating system. This action is determined by the
auto_action environment variable.
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