User`s guide

Table B–7 Higher 512KB Flash ROM Image Selection
TOY RAM Value
1
Firmware ID
2
Image Description
00 0 Evaluation board debug monitor firmware
01 1 Windows NT firmware
02 2 Alpha SRM firmware (OpenVMS)
3
03 2 Alpha SRM firmware (Digital UNIX)
3
8n NA
4
SROM code will load the nth image from
flash ROM.
If n=0, the SROM code loads the entire
flash ROM contents.
If n=1,2, . . . , the SROM code loads the
first image, second image, and so on.
1
Operating system type. Found at TOY RAM address 3F.
2
Found in image header.
3
The flash ROM will contain only one of these images.
4
Not applicable.
If an image is specified and not found, the AlphaPC64 will load the first image
in flash ROM with a valid header. If no valid header is found, the whole 1MB
is loaded at address 0000 0000.
The following sections describe how to change the value stored in TOY RAM
location 3F by using either the basic debug monitor commands or the bootopt
debug monitor command.
SROM Initialization B–13