Firmware History

V32: 31.08.2021
  ALL: Lowered consumption in serial console
  DM1x: Added new 5x7 inspired font
  DM1x: Default speed set to 12MHz to prolong battery life
  DM1x: Added configuration key to toggle between annunciators on top or bottom
  DM1x: Displaying "MEMORY CLEAR" instead of "Pr Error"


V31: 19.10.2020
  ALL: Fixed battery consumption problem


!!! V30 firmware was removed after confirmation of excessive consumption in OFF mode
V30: 17.01.2020 
  ALL: Added 'bootloader' serial console command
  ALL: Abandoned support for 32kB firmwares
  ALL: Improvements to Nut emulation layer
  DM41: Stopwatch now generates 'TIMER ALARM' when SW is hidden as well when calculator is turned off.


V29: 05.06.2019
  DM41: Past due alarm bypass at auto power-down
  DM15_Mxx: GTO I: extended range to 999
  DM15_M80: Change initial register allocation to match other DM15 models


V28: 22.02.2019
  DM1x: Fixed irregular LCD blinking 
  DM41: Fixed non-responsive keys during ALARM acknowledgment period
  DM41: Emulation fixes - should fix earlier synthetic programming inaccuracies


V27: 05.09.2018
  DM1x - Programs were sometimes almost impossible to stop e.g. when PSE was used in short loop. Now fixed.
  DM1x - Fixed missing dot in program listing of RCL .1 and similar (for non-segment fonts)
  DM41 - Fixed continuous stopwatch operation


V26: 25.03.2018
  New bold 7-segment font (all DM1x models)
  Bugfix: Registers overwritten after numeric integration. Fixed in DM15_M80, released as DM15_M80_V16a_32k.hex for old 32k machines
  Bugfix: MEM output fixed in DM15_M80 and DM15_M1B
  DM41: Speed improvement

V25: 18.01.2018
  Fixed timing of alarm catalog listing
  Fixed GETKEY delay to ~10s duration
  Added X-mem module to DM41
  New slim 7-segment font for DM1x models

V24: 31.10.2017
  Modify time module ROM to remap T/R/M keys from [7], [9] and [RCL] to landscape positions in ALMCAT
  Fixed PSE delay on all models

V23: 10.05.2017
  added manual setting of time and date
  fixed memory dump for DM12

V22: 02.10.2016
  Fixed occasional calculator hanging
  Changed init after reset (no moving text anymore), more battery friendly
  Fixed CAT 4/6 delay for DM41
  Fixed default date for DM41 (2014-01-01 Wednesday)

V21: 03.03.2016
  DM1X fixed PSE (keep any button pressed to interrupt)
  DMXX add setting via console to increase the time-out of the serial console mode
  DMXX Fixed julian date calculation ([ON]+[STO/RCL] +/- one hour just around midnight causing day transition) 
  DM1X for all boards with RTC: add [ON]+[A] displaying the time with 1s increments by RTC and sleep in the mean time
  DMXX Add timeout to clock mode [ON]+[A] to 5min
  DM41 adjusted key mapping for LCD contrast settings to the same as the other models

V19: 18.07.2015
  DM41 bugfix ON-key conflicting with RTC (long running pgm suddenly stopped and sporadic lock-ups)

V18: 23.04.2015
  DM41 without extended module

V17: 20.04.2015
  initial release DM41 with extended module

V16: 13.02.2014
  fixed keyboard timing issues introduced in V15
  optimized power consumption
  DM15 versions include all three fonts in one firmware
  *** this will be the last firmware version <32k; only newer calculators with an LPC1115 will be support by the next releases ***

V15: 25.09.2013
  rewritten keyscan routine - improved key respond - affects all models
 
V14: 18.06.2013
  enhanced pending key indicator for DM15
  LCD contrast setting changed - changing settings requires confirmation
 
V13: 05.03.2013
  fixed pending key indicator display (little square upper left corner)
 
V12: 17.02.2013
  fixed bug for complex mode in both extended ROMs versions for DM15C_M80 and DM15C_M1B (many thanks to Yukihiro Imanaga 今永之弘)

V11: 22.01.2013
  fixed SST autorepeat delay for 10C, 11C and 12C
  all model names are reduced from DM1xCC to DM1x
  extended memory version renamed from MEM80/MEM1B to M80/M1B

V10: 26.11.2012
  slim font added to all firmware versions ([ON]+[7] cycles through three fonts) except DM-15 has two different firmware versions each with only two fonts
 
V9: 26.11.2012
  added low battery indicator
  fixed serial communication race condition
  turning calc ON sends message to serial port
 
V8: 29.8.2012
  added self captured 16C ROM, now we got them all
  added LCD contrast settings [ON]+[CHS]
  updated annunciators in key-test for 10C

V7: 15.7.2012
  Fixed problem with MEM display on 15C
  added battery voltage displayed in [ON]+[E] screen
  added read battery voltage on console (calculators from first batch do not have a Vref diode)
 
V6: 1.7.2012
  removed the firmware naming 'VANILLA'
  all ROM files are based on own extraction except for the 16C which we don't have yet
  changed CPU speed to 48MHz. switch to 12MHz and back with [ON]+[9]

V4: 4.4.2012
  fixed PREFIX shows the enhanced MEM display

V3: 25.3.2012
  Enhanced MEM display for memory extended firmwares
  [ON]+[E] displays firmware version on LCD

V2: 22.3.2012
  initial release DM11CC
 
V2: 14.3.2012
  initial release DM12CC

V2: 21.2.2012:
  corrected ROM in DM15CC_ROM_MEM80_V2.hex
  thanks to Jean-Francois Garnier for pointing to that mistake

V1: 10.2.2012:
  initial versions DM15CC, DM16CC