Motorola MVME2600 Series User Manual Page 277

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SROM - SROM Examine/Modify
3-209
3
SROM - SROM Examine/Modify
Command Input
SROM [offset]
Options:
None
Description:
The SROM command allows the user to examine and modify the
contents of the network SROM attached to the DEC21140 Ethernet
chip.
When the command is invoked, the user will be prompted with
choices of base addresses of DEC21140 chips which have attached
SROMs. Upon selection of the device, the SROM contents is read
into a buffer and the user allowed to view and edit the buffer. If
changes are made to the buffer contents, the user is prompted
whether to allow the SROM to be updated or not. The SROM
command also automatically calculates the required SROM
checksum and writes it to the SROM if allowed by the user.
The optional offset argument allows the user to specify what offset
within the buffer to begin viewing/editing at. If omitted, a default
value of 0 is used for offset.
When the command is entered at the BUG prompt, an opportunity
is given to edit the SROM for each device present on any attached
PMCspan board, as well as the base board.
!
Caution
In normal cases, the network SROM will have been
programmed at the factory to the correct contents.
Proper operation of the Ethernet interface under both
BUG and Operating Systems is dependent on the SROM
containing correct information. Users should not
modify the SROM contents unless there is a well
understood reason for doing so.
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