68K System Monitor
User's Guide GE Energy Services
General SWM0023-1.00 -2
Full Release 3-27
DL - Download
Platform þCPM þD20
D20 Base þD20 ME
D20 Base þD20/200
CCU Base þD20/200 ME
CCU Base þD25
Description Use this command to download data (typically configuration files (all platforms) or
D25 and CCUME application (FLASH) code).
Note: When downloading application code files, this command must be used only
when executing from the BootROM. This will be indicated by the D25A>,
or the D20MEA> prompts for the D25 or D20ME-based systems,
respectively.
The Monitor accepts S1, S2 and S3 data records, and S7, S8 and S9 end records, and
optional S0 comment records in the downloaded file. The monitor rejects all other
types of records.
Once the command verifies the checksum within the record, the contents of data
records (S1, S2 or S3) are stored in memory. When it receives an S7, S8 or S9 end
record, the DOWNLOAD command returns control to the Monitor’s command line.
Syntax Below is usage and syntax information for this command
Command Format D25 / CCUME: dl [/o offset]
CPM / D20 / CCU: dl
Variables offset = the offset at which to download
Parameters /o = specifies that an offset follows
Example Type dl and press ENTER.
Results: This prepares the monitor to receive Motorola S-
records over the serial port. The monitor does not
echo any further until it encounters an end record
(the prompt returns at this point) or a format or
record checksum error (this returns an error
message before returning the prompt).
Special
Considerations
Each S-record, terminated by a carriage return or line feed,
cannot exceed 80 decimal bytes in length.
Application code download works ONLY when:
• The BootROM code is being executed AND
• The FLASH region has been erased.
!
WARNING
Executing this command modifies the memory of the system, and can cause
operational disruption.
Use caution before proceeding.