User`s guide

Table Of Contents
User Commands 4–153
User Commands
sum
sum
The sum command computes the checksum of the data in the specified range.
Format
sum start_address end_address
Parameters
start_address
Specifies the address at which the checksum check begins.
end_address
Specifies the address at which the checksum check ends.
Description
The sum command prints the checksum of the data contained in the specified
memory range. The algorithm used computes a 16-bit checksum and is compatible
with the standard BSD4.3 algorithm provided in most implementations of UNIX
(sum), thus allowing easy comparisons of images in the motherboard’s memory with
those on the UNIX host.
Example
AlphaPC 64> netload pc64dbm.rom
Digital Semiconductor 21040 (0): Initializing
Hardware address = BA-98-76-54-32-10
Trying 10 Base T
Switching to AUI
MAC address: BA-98-76-54-32-10
Attempting BOOTP...
Loading /sae_share/boot/user1/pc64/pc64dbm.rom at 0x300000
My IP address: 16.123.45.67
Server IP address: 16.123.45.69
###################
File loaded successfully. Size = 0x30B80 (199552)
AlphaPC 64> sum 300000 330B7F
0xe5cc 58828