Installation guide

Windows NT Installation Guide44
4.3 Fail-Safe Booter
The fail-safe booter, currently available for use on the AlphaPC 164SX, the
AlphaPC 164LX, and the AlphaPC 164 only, provides an emergency recovery
mechanism when the primary firmware image contained in flash memory has
been corrupted. When flash memory has been corrupted, such that no image is
safely loaded from the flash, the fail-safe booter can be run to facilitate booting
another image from a diskette that is capable of reprogramming the flash.
4.3.1 Starting the Fail-Safe Booter
The fail-safe booter can be started in one of two ways for each system listed
below.
AlphaPC 164SX and AlphaPC 164LX
• If the primary firmware image is unavailable when the system is powered on
or reset, the fail-safe booter runs automatically. When the fail-safe booter
runs, the system emits a series of beeps through the speaker as beep code
1–2–3; this is, one beep and a pause, followed by two beeps and a pause,
followed by three beeps. After the diskette activity light flashes:
1. Insert the system-specific AlphaBIOS Firmware diskette. The fail-safe
booter will load and run AlphaBIOS from this diskette.
2. Go to Section 2.3 and follow the procedure for upgrading AlphaBIOS.
• You can also start the fail-safe booter manually as follows:
1. Power off your system.
2. Add jumper CF7 as described in the system-specific motherboard
Windows NT user’s manual.
3. Power on your system.