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DM15L Startup Keys & Serial Console

The DM15L has a few options which are set by holding certain keys at power on

Key	Function description
A	Display time/date for 5 minutes
B	Benchmark. Evaluate speed compared to original calculator
C	Switch to serial console
E	System info. Firmware version, battery voltage, current frequency, etc.
CHS	Change LCD contrast.¹⁾
EEX	Reset LCD contrast to default values.
STO	Adjust RTC: decrement -1h
RCL	Adjust RTC: increment +1h
7	Cycle through available fonts
9	Configure CPU speed. Toggle between 12MHz and 48MHz
÷	Keyboard self test
⨯	Self test
−	Power reset
+	Endless test
.	Toggle decimal delimiter
SST	Time/date adjustment.²⁾
GTO	Toggle annunciator position

Serial Console

Speed : 38400
Data bits : 8
Stop bits : 1
Parity : None
Flow control : XON/XOFF (or none)

 
VOYAGER >> ?
Firmware DM15_M80_V32

?          Help
p          Key press
s          Dump memory
l          Load memory
ct         Console timeout
bootloader Invoke Bootloader
t          Get time
ts         Set time
td         Update time
kb         Toggle keyboard output to console
d          Toggle display output to console
b          Read battery voltage

Type '<command> ?' for params
VOYAGER >>

Page Info

Page created Thu May 26 17:41:19 2022 by John Pumford-Green

Page last updated: 06/03/25 06:49 GMT

dm15l, calculator

¹⁾

LCD Setting : Param1: up +, down −, Param2: up Σ+, down 3

²⁾

Date Adjustment Usage: Up +, Down −, Next ⨯, Prev ÷, ENTER to Set, ON to Cancel