User`s manual

4.4 Flash ROM (System ROM)
AlphaPC64> bootopt
Predefined bootoptions are...
"0" "Alpha Evaluation Board Debug Monitor" "DBM"
"1" "The Windows NT Operating System" "NT"
"2" "OpenVMS" "VMS"
"3" "Digital UNIX" "UNIX"
O/S type selected: "Alpha Evaluation Board Debug Monitor"
....Firmware type: "DBM Firmware"
AlphaPC64> bootopt nt
O/S type selected: "The Windows NT Operating System"
....Firmware type: "Windows NT Firmware"
AlphaPC64> bootopt
Predefined bootoptions are...
"0" "Alpha Evaluation Board Debug Monitor" "DBM"
"1" "The Windows NT Operating System" "NT"
"2" "OpenVMS" "VMS"
"3" "Digital UNIX" "UNIX"
O/S type selected: "The Windows NT Operating System"
....Firmware type: "Windows NT Firmware"
AlphaPC64>
Support for other operating systems requires the purchase of the proper
software license.)
Use the debug monitor bootopt command to see the image choices and note
which image is selected.
Use the debug monitor bootopt nt command to change the selected image
from0to1.
Use the debug monitor bootopt command to verify that the selected image
has changed from 0 to 1.
4.4.3 Flash ROM Access
The flash ROM can be viewed as two banks of 512KB each. At power-up,
the lower 512KB bank is accessed using the address range 3 FFF8 0000 to
3 FFFF FFFF.
Setting address bit 19 will allow you to access the higher 512KB of flash ROM.
Write a 1 to the register at address 800 to set address bit 19. Manually deposit
a 1 to address 1 C001 0000 or enter the following command from the debug
monitor:
> wb 800 1
Functional Elements 4–11