2
SwissMicros • Save and restore state
Save and restore state
Here we cover how to save and restore the calculator
“state”, which includes the complete contents of what
HP called the “continuous memory” (stack, registers,
programs, etc).
The following requires that you have completed the steps
on page 1 “Serial connection”.
Saving calculator memory
1. with serial monitor window open, put calculator
in
Serial Console
mode : turn calculator off, then
press and hold the alpha key
C
, press
ON
briefly,
and then release alpha key
C
2. the monitor window returns (for the DM-41 model) :
DM41 turned on
DM41 ready
3. to dump contents of calculator memory, enter :
s
4. the memory dump appears under the prompt
5. this dump can be copied, pasted and saved to a text file
(including the short line at the top which describes the
calculator model) to be later restored to the calculator
Restoring calculator memory
1. with the monitor window open, ready the calculator
by entering :
l
(lowercase «L»)
2. the command prompt changes to :
Waiting for data...
3. copy all characters from the memory dump, including
the short line at the top which describes the calculator
model
4. paste this in the monitor window *
5. monitor window outputs :
Read OK
and the command prompt returns to (for the DM-41
model) :
DM41>>
6. calculator memory is now restored
Set time and date
Here we cover how to set the internal clock and calendar
of the calculator. As a reminder, you can display the
internal clock and calendar on the calculator’s LCD display
so : turn calculator off, then press and hold the alpha
key
A
, press
ON
briefly, and then release alpha key
A
.
The following requires that you have completed the steps
on page 1 “Serial connection”.
Getting calculator internal date and time
1. in the serial monitor window, enter :
t
2. the monitor window returns date, time and day of the
week in format :
YYYY-MM-DD HH:MM:SS DDD
Setting date and time
1. the command to set date and time is
ts
2. and the arguments to the command are formatted so :
ts <YYYYMMDD> <HHMMSS>
3. for instance for September 22
nd
of 2016, 6:30 PM,
enter the following command :
ts 20160922 183000
4. date and time are now set
* PuTTY defaults the paste command to the right mouse button in
Windows ; check configuration in
Window
Selection
Guide v1.63 by Emy Amstein
