05.06.2013, Matthias Koch, Mecrisp-Stellaris 0.1 experimental:

  I am very happy to announce Mecrisp-Stellaris !
  This is the very first beginning, expect monsters inside.

  As this is the younger sister of Mecrisp for MSP430,
  they share their development history and most design ideas.


12.06.2013, Matthias Koch, Mecrisp-Stellaris 0.2 experimental:

  - Unicode support
  - First interrupt handler for Systick-Timer
  - Lots of small changes
  - Ledcomm ported

15.06.2013, Matthias Koch, Mecrisp-Stellaris 0.3 experimental:

  - Recognizes both LF and CR as line ending
  - Uses hardware FIFO buffer for serial communication
  - Enables GPIO hardware on startup
  - Tidied up internal register usage
  - Faster interrupt entry
  - Fetch-Modify-Store definitions are now interrupt safe
  - Mecrisp-Stellaris now generates smaller code
  - Tidied up debug messages
  - Lots of small changes

23.06.2013, Matthias Koch, Mecrisp-Stellaris 0.4 experimental:

  - Examples in Forth for Analog, Timer, PWM and Interrupts
  - Interrupt handling for Ports and Timers included
  - Tidied up source code
  - Core needs less RAM
  - Lots of small changes

01.07.2013, Matthias Koch, Mecrisp-Stellaris 0.5 experimental:

  - Faster comparisons & bit@
  - Beautiful output for .s in current base
  - Analog Interrupts for ADC0 included
  - Examples in Forth for PLL setup and 1 Msps analog sampling

07.07.2013, Matthias Koch, Mecrisp-Stellaris 0.6 experimental:

  - New target: STM32F407 on STM32F4-Discovery board
  - Removed experimental atomic memory access from core
  - Rearranged source code and
    added English comments to simplify porting
  - First examples for STM32F4 included

29.07.2013, Matthias Koch, Mecrisp-Stellaris 0.6.1 experimental:

  - Bugfix in min and max
  - 1 Msps analog sampling example for STM

24.08.2013, Matthias Koch, Mecrisp-Stellaris 0.7 experimental:

  - New target: KL25Z128 on Freescale Freedom FRDM-KL25Z board
  - Deep changes in core:
    - New code generator for M0
    - Improved code generator for M3

10.08.2013, Matthias Koch, Mecrisp-Stellaris 0.7.1 experimental:

  - ADC and DAC examples for KL25Z128
  - Improved code generation for M0

07.11.2013, Matthias Koch, Mecrisp-Stellaris 0.7.2:

  - A lot of testing later: "experimental" is gone !
  - Disassembler for M0 included
  - Two channel 1 Msps sampling example for LM4F120
  - Contributions:
      Random number generator for STM32F4 by Sean Stasiak
      LM4F232H5QC port for Chinese QF-LM4F232 board by 呂明貴 (Albert)

16.11.2013, Matthias Koch, Mecrisp-Stellaris 0.8:

  - Deep changes in core: Opcodings !
    They generate faster code for all targets.

28.11.2013, Matthias Koch, Mecrisp-Stellaris 0.8.1:

  - New target: STM32F100 on STM VL Discovery board

18.12.2013, Matthias Koch, Mecrisp-Stellaris 0.9:

  - Double numbers and s31.32 fixpoint calculations
  - Sine/Cosine Cordic algorithm
  - Two channel 1 Msps oscilloscope for LM4F120

31.12.2013, Matthias Koch, Mecrisp-Stellaris 0.9.1:

  - Partial disassembler for M3/M4 included
  - Small optimisations in core

13.01.2014, Matthias Koch, Mecrisp-Stellaris 0.9.2:

  - Small optimisations in M3/M4 code generator
  - Faster interrupt trampolines for M3/M4
  - Timer interrupts for STM32F407
  - Added rdrop and 2rdrop

06.02.2014, Matthias Koch, Mecrisp-Stellaris 0.9.3:

  - Added for convenience: d/ mod f.n
  - Final testing package for upcoming stable 1.0 release

01.03.2014, Matthias Koch, Mecrisp-Stellaris 1.0:

  Finally the first stable release of Mecrisp-Stellaris !

21.03.2014, Matthias Koch, Mecrisp-Stellaris 1.0.1:

  Bugfix in third loop index "k"

26.03.2014, Matthias Koch, Mecrisp-Stellaris 1.0.2:

  - New target: TM4C1294 on Tiva Connected Launchpad

05.04.2014, Matthias Koch, Mecrisp-Stellaris 1.0.3:

  - New target: STM32F429ZIT6 on STM F429 Discovery
  - Instruction set emulator for Cortex M0 included

23.04.2014, Matthias Koch, Mecrisp-Stellaris 1.0.4:

  - Added Intel Hex style binaries for STM targets
  - Improved code generation for do and ?do
  - Fixed minor issue with arshift when opcoded
      with folding constant >= 32
  - Added bit rotations ror and rol
  - M3/M4 only:
    - Added 12bitencoding
    - Faster opcodes for inline literals,
        calculations, logic and comparisions
    - Included new opcodes into disassembler-m3

01.05.2014, Matthias Koch, Mecrisp-Stellaris 1.1.0

  Big tidyup release !
  - Improved readability of chip specific code
  - Factored out a lot of common code
  - Move now behaves well for both directions
  - Added fill and compiletoram?
  - Improved dictionary building macros
  - Fixed flaw in LM4F120 PLL example

02.05.2014, Matthias Koch, Mecrisp-Stellaris 1.1.1

  - New target: STM32F051R8 on STM F0 Discovery
  - Tidyup and factoring of common STM terminal code

03.05.2014, Matthias Koch, Mecrisp-Stellaris 1.1.2

  - New target: STM32F401RE on STM Nucleo F401RE
  - Variables and <builds does> are now 4-aligned on M3/M4, too
  - Added buffer:
  - Hooks for terminal redirection on TM4C1294

08.05.2014, Matthias Koch, Mecrisp-Stellaris 1.1.3

  - Added sp@ sp! rp@ rp!
  - Added hook for inner quit loop
  - ?emit and hooks for terminal redirection on all targets
  - Serial terminal code calls vectorized pause for multitasking
  - Tidyup and factoring of more common code

19.05.2014, Matthias Koch, Mecrisp-Stellaris 1.1.4

  - New target: STM32F103C8 on Shenzhen LC Technology board

21.05.2014, Matthias Koch, Mecrisp-Stellaris 1.1.5

  - Tab is now recognized as whitespace
  - Added irq-fault

27.05.2014, Matthias Koch, Mecrisp-Stellaris 1.1.6

  - Analog and PLL examples for TM4C1294
  - Enabled Prefetch Buffer in PLL examples for STM32F407
  - Added Forth source for multiline comments
  - Added Bitlog and Bitexp functions
  - Improved code generation for fetch-modify-store shortcuts
  - Testing of LM4F120 binary on TI Tiva Launchpad with TM4C123GH6PM

03.06.2014, Matthias Koch, Mecrisp-Stellaris 1.1.7

  - Added string handling helpers: expect tib >in
  - Contribution by Mark Schweizer:
      MK20DX256VLH7 port for Teensy 3.1 board

26.06.2014, Matthias Koch, Mecrisp-Stellaris 1.1.8

  - Added Loran-C for TM4C1294
  - Contribution by John Huberts:
      Port for Nordic nRF51822
  - Contribution by Bernd Paysan:
      Ethernet drivers for TM4C1294

30.06.2014, Matthias Koch, Mecrisp-Stellaris 2.0.0

  - Big changes in string handling !
    The new core is now a lot more ANS aligned and handles addr-length strings.
  - Renamed ?key in key? and ?emit in emit?
  - Renamed old counted-string handling with c-prefix
  - Create now has default action equivalent to : create <builds does> ;
    Old behaviour is renamed into (create)
  - Added irq-terminal to LM4F120 and TM4C1294 targets
  - Fixed flaw in 16-bit Flash write emulation layer for Freescale targets
  - Changed disassemblers and examples for new string handling

  Simply renamed with same function:
     ?key          --> key?
     ?emit         --> emit?
     serial-?key   --> serial-key?
     serial-?emit  --> serial-emit?
     hook-?key     --> hook-key?
     hook-?emit    --> hook-emit?
     expect        --> cexpect
     create        --> (create)
     type          --> ctype
     s"            --> c"

  Chanced behaviour:
     string,
     find
     compare
     number
     token
     parse
     #>

     s"
     type
     create

  Freshly added:
     cell+
     cells
     align
     aligned
     spaces
     count
     create
     type
     accept
     evaluate
     s"
     current-source
     setsource
     source

02.07.2014, Matthias Koch, Mecrisp-Stellaris 2.0.0a

  - Fixed a flaw in NVIC Forth code
  - Fixed a minor flaw in ethernet driver
  - Added 1Msps analog-digital converter ethernet stream example

08.07.2014, Matthias Koch, Mecrisp-Stellaris 2.0.0b

  - Added comments for nRF51822 in README
  - Fixed flaw in Pascal UDP ethernet terminal code

09.07.2014, Mark Schweizer, Mecrisp-Stellaris 2.0.1

  Following changes added for MK20DX256:

  - terminal.s:  Turned on UART0 RX/TX FIFO
                 Changed code for ensuring UART overrun flag is cleared
		 Added support for hardware flow control
  - vectors.s:   Added UART0_S/E interrupt vektor to permit the possibility
                 of interrupt driven serial (interrupts not enabled by
                 default)
  - interrupt.s: Added "ipsr" word to push Interrupt Program Status Register
                 on stack
                 Added initialization of UART0S / UART0E interrupts
  - README:      Documented serial connection, flashing, etc. (basic info)
  - Forth:       Added more examples, cleaned up code.  Seperate README
                 located in that directory.

  Matthias Koch:
  - Cleaned up core sources to save a few bytes

16.07.2014, Matthias Koch, Mecrisp-Stellaris 2.0.2

  - Added IPSR by Mark Schweizer for all targets
  - Added UNHANDLED as new default for all IRQs
  - irq-fault now catches fault handlers only
  - irq-collection catches all other interrupts
  - Factored common vector tables and interrupts
  - Added dictionarynext to core
  - Removed dump

  - New target: STM32F303VCT6 on STM F3 Discovery
  - New target: STM32L152RE   on STM Nucleo L152RE

23.08.2014, Matthias Koch, Mecrisp-Stellaris 2.0.3

  - Bugfix: Double division
  - Some small optimisations in core
  - Assembler for Cortex M0 added

18.10.2014, Matthias Koch, Mecrisp-Stellaris 2.0.4

  - Optimisations for bit@ hbit@ cbit@
  - Added rdepth rpick
  - Forth code for blocks and trace
  - Ported Ledcomm to Nucleo L152
  - Contribution by John Huberts:
      Nordic nRF51822 radio code

06.11.2014, Matthias Koch, Mecrisp-Stellaris 2.0.5

  - New experimental target: LPC1114FN28 (without Flash write access for now)
  - Unicode block editor added

11.11.2014, Matthias Koch, Mecrisp-Stellaris 2.0.5a

  - Adapted Thumbulator emulator for LPC1114FN28 and
      added Forth code to generate custom binaries for this target
  - Fixed a small flaw in disassemblers

04.12.2014, Matthias Koch, Mecrisp-Stellaris 2.0.6

  - Finally solved compilation into Flash for LPC1114FN28

01.01.2015, Matthias Koch, Mecrisp-Stellaris 2.0.7

  - Delete character 127 is now recognized
  - New target: STM32F030F4
  - Ethernet driver now has support for DHCP and ARP
  - Improved analog stream over ethernet
  - Added Ledcomm for LPC1114FN28
  - Added Real Time Clock for LM4F120 and TM4C1294
  - Added Inertial Sensor code for STM32F3 Discovery
  - Fixed counter rollover issues in systick timer delay
  - Contribution by Terry Porter:
      Register file generator from SVD to Forth with STM examples

08.02.2015, Matthias Koch, Mecrisp-Stellaris 2.0.8

  - Fixed flaw in LPC1114FN28 specific flash buffer handling
    that caused freezes after calling quit
  - Multitasking example for all targets
  - PLL and lowpower terminal code for LPC1114FN28
  - Initial graphics drivers to draw pixels on STM32F429 Discovery
  - Contribution by James Bowmann:
      Forth drivers for Gameduino 2 on STM32F401RE Nucleo
      Marsaglia pseudo random number generator
  - Contribution by Terry Porter:
      Register file generator with individual bitfields

22.02.2015, Matthias Koch, Mecrisp-Stellaris 2.0.9

  - Added eint? and reset
  - Removed obsolete ?dnegate
  - Fixed some documentation flaws in glossary

13.03.2015, Matthias Koch, Mecrisp-Stellaris 2.1.0

  - New target: LPC1115FBD48
  - Contribution by Bert Lohmann:
      I2C, LCD, PWM in and PWM out examples for LPC1114FN28

04.04.2015, Matthias Koch, Mecrisp-Stellaris 2.1.1

  - New target: MSP432P401R on MSP432 Launchpad
  - Eraseflash now performs an hardware Reset on all targets

11.04.2015, Matthias Koch, Mecrisp-Stellaris 2.1.2

  - New target: STM32L053C8 on STM32L053 Discovery
  - E-Paper display example for this new board

18.04.2015, Matthias Koch, Mecrisp-Stellaris 2.1.3

  - Ethernet driver updated to new multitasker
  - Added graphics library for lines, circles, ellipses and bitmap font
  - Contribution by Jean Jonethal:
      New target: Nucleo STM32F411
  - Contribution by Glen Worstell:
      An example for a custom prompt

27.09.2015, Matthias Koch, Mecrisp-Stellaris 2.1.4

  - New experimental target: ARM-Linux and Android
  - Faster implementation of abs function
  - Jean Jonethal fixed UART blocking on overrun for STM32F303
  - Added early experimental bignum implementation
  - Contribution by Ulrich Hoffman:
      Examples for syscall usage in ARM Linux

15.10.2015, Matthias Koch, Mecrisp-Stellaris 2.1.5

  - Contribution by Абдрахимов Илья:
      New target: STM L152 Discovery

22.10.2015, Matthias Koch, Mecrisp-Stellaris 2.2.0 & RA 1.0 experimental

  - Merged the experimental RA branch with the mainstream package

  Changes to the mainstream release are:

  - Replaced align, with halign
  - Removed align4, as it has been identical with align
  - Improved maintainability of the code
  - Small improvements under the hood here and there

28.10.2015, Matthias Koch, Mecrisp-Stellaris 2.1.6

  - Many new examples for Teensy 3.1 by Andreas Wagner
  - Bugfix for STM32L152 vector map and additional interrupt vectors,
    more examples for STM L152 Discovery by Абдрахимов Илья (Ilya Abdrahimov)

31.10.2015, Matthias Koch, Mecrisp-Stellaris RA 1.1

  - Merged news from 2.1.6 into this package
  - Improved tuck

01.11.2015, Matthias Koch, Mecrisp-Stellaris RA 1.2

  - Jean Jonethal added STM32F303-RA and fixed a bug.

05.11.2015, Matthias Koch, Mecrisp-Stellaris RA 1.3

  - Inline-Cache allows register allocation across inlined definitions

08.11.2015, Matthias Koch, Mecrisp-Stellaris RA 1.4

  - Small improvements for negate

14.11.2015, Matthias Koch, Mecrisp-Stellaris RA 1.5

  - Smaller disassemblers
  - Continuous sampling with exponential average for Loran-C
  - RTC examples for STM L152 Discovery by Абдрахимов Илья (Ilya Abdrahimov)
  - Contribution by Jean Jonethal:
      New target: STM L476 Discovery

28.11.2015, Matthias Koch, Mecrisp-Stellaris RA 1.5a

  - Added fast integer square root
  - More examples for STM L152 Discovery by Абдрахимов Илья (Ilya Abdrahimov)
  - Experimental new target: XMC1100 on Infineon XMC2GO board


24.12.2015, Matthias Koch, Mecrisp-Stellaris 2.2.0 - Christmas release !

  My Christmas present for you:
  Mecrisp-Stellaris RA with Register Allocator is ready for mainstream release
  and should already be quite stable after a few months of testing.

  Now you can choose for your projects if you need the smaller classic core
  or the larger RA which includes much stronger optimisations.

  Both should have exactly the same capabilities and behaviours.

  Some hints for the choice:

  If you touch performance barriers with the classic core,
  if you love experiments and if you are curious,
  try the fresh Mecrisp-Stellaris RA core.

  If you have something that already works well with older releases,
  if your project has high demands on stability,
  if space is what you wish to save,
  use the smaller and rock solid classic Mecrisp-Stellaris.

  Changes relative to Mecrisp-Stellaris 2.1.6:

  - Replaced align, with halign
  - Removed align4, as it has been identical with align

01.01.2016, Matthias Koch, Mecrisp-Stellaris 2.2.1 - 32C3 release !

  E-Paper graphics buffer and paint primitives
  New target: Silicon Labs Giant Gecko Starter Kit with EFM32GG990F1024
  Fixed flaw in RA core when inlining empty definitions

  - Contribution by Ilya Abdrahimov: 1-Wire for STM32L152RB
  - Contribution by Jean Jonethal:
      New target: STM F746 Discovery

13.02.2016, Matthias Koch, Mecrisp-Stellaris 2.2.1a

  - LDMIA + Interrupt silicon bug found: KNOWN-ISSUES added
  - Added RA for LPC1115
  - Contribution by Ralph Sahli: Peripheral libraries for STM32F407
  - Contribution by Terry Porter: Register definitions and insight generator
  - Contribution by Igor OM1ZZ: Eight queens bechmark and PLL code

20.02.2016, Matthias Koch, Mecrisp-Stellaris 2.2.2

  - More interrupts in STM32F103
  - Added STM32F103-RA
  - Contribution by Ilya Abdrahimov: Many examples for STM32F429
  - Contribution by Ralph Sahli: Many more examples and libraries for STM32F407

26.03.2016, Matthias Koch, Mecrisp-Stellaris 2.2.3

  - New target: Silicon Labs Happy Gecko Starter Kit with EFM32HG322F64

28.03.2016, Matthias Koch, Mecrisp-Stellaris 2.2.4

  - No line break directly after the "Redefine..." message anymore
  - Graphics driver for Sharp LCD on Happy Gecko
  - New target: KL46Z256 on Freescale Freedom FRDM-KL46Z board

06.04.2016, Matthias Koch, Mecrisp-Stellaris 2.2.5

  - Added ahead and changed control structures to allow more combinations
  - Fixed Forth register constants for PORTE on KL25Z128 and KL46Z256
  - New target: MK64FN1M0 on Freescale Freedom FRDM-K64F board
  - New target: LPC1114FBD48
  - New target: Nordic nRF51822 prepared for Microbit

08.05.2016, Matthias Koch, Mecrisp-Stellaris 2.2.6

  - Scripts for invoking Mecrisp-Stellaris for ARM Linux with qemu-arm-static
  - Contribution by Bernd Paysan:
      New target: STM32F207ZG on Nucleo-F207ZG

14.05.2016, Matthias Koch, Mecrisp-Stellaris 2.2.7

  Linux target got an improving touch:

    - Added cacheflush to solve difficulties with data and instruction cache flushes
    - Welcome message is omitted when command line arguments are specified
    - A check for Ctrl+D and for EOF in serial-key quits Mecrisp-Stellaris for Linux
    - arguments, reset, eraseflash and eraseflashfrom added
    - Now 1 MB for compiletoram and compiletoflash each
    - Smaller binary
    - Forth code for cornerstone added
    - Handling of command line arguments in Forth

19.06.2016, Matthias Koch, Mecrisp-Stellaris 2.2.8

  - Increased stack size for Linux target
  - Mecrisp-Stellaris-Linux now uses software division like the M0,
      as, crazy enough, there is no integer division on large ARMs like A9 and A15.

23.08.2016, Matthias Koch, Mecrisp-Stellaris 2.2.9

  - Contribution by Ralph Sahli:
    New target: STM32F303K8 with many examples.
                "Neopixel" driver for WS2812B LEDs and more.

25.09.2016, Matthias Koch, Mecrisp-Stellaris 2.3.0

  - With a lot of heavy testing out in the wild, now it is time to announce
    the register allocator "RA" as stable and ready for general usage.

  - "Dotstar" driver for APA102 LED strings connected to a LM4F120
  - Profiler written in Forth to count usage of definitions
  - Forth code for conditional compilation
  - Contribution by Ilya Abdrahimov:
      Improved 1-Wire drivers and many new examples for STM32F103 and STM32F411

02.12.2016, Matthias Koch, Mecrisp-Stellaris 2.3.1

  - A bug was found in the register allocator: Fixed abs for all RA targets.
  - Contribution by Terry Porter:
      svd2forth-v2 - A fresh register file generator from SVD to Forth

15.12.2016, Matthias Koch, Mecrisp-Stellaris 2.3.2

  - RA binary for STM32L053C8
  - Contribution by Ronny Suy:
      New experimental target: ATSAME70Q21 on Atmel SAME70 X-plained,
      just still without the possibility to compile into flash.

01.01.2017, Matthias Koch, Mecrisp-Stellaris 2.3.3 - 33C3 release !

  - Added forgetram to all targets
  - Added call trace utility and quotations
  - RA binary for MSP432P401R
  - Added autoerase macro which clears flash dictionary on the first run
  - All EFM32 Gecko and MSP432 targets are now equipped with the autoerase feature
  - Contribution by Ralph Sahli:
      New targets: STM32F303RE on STM Nucleo F303RE
                   STM32L432KC on STM Nucleo L432KC

21.01.2017, Matthias Koch, Mecrisp-Stellaris 2.3.4

  - RA binary for STM32F407
  - Contribution by Ralph Sahli:
      New target: STM32F401CD on Espruino Pico

22.02.2017, Matthias Koch, Mecrisp-Stellaris 2.3.4a

  No changes in binaries, just fixed a documentation flaw and new Forth features:

  - Fixed glossary: c-addr length strings are used by number

  - Jean-Claude Wippler conquered USB: Drivers for STM32F103 and STM32F303 included
  - Direct digital synthesis dual sinewave function generator for STM32F407
  - Very early experimental access to the hardware floating point unit

22.02.2017, Matthias Koch, Mecrisp-Stellaris 2.3.5

  - Found a bug: If the "init" mechanism was used on RA cores, compilation of the first
    definition after a Reset might generate a leading bogus sequence of opcodes due to
    a not properly initialised internal variable.

    Workaround, if you cannot update the core: Type "quit" before doing fresh compilations.

16.03.2017, Matthias Koch, Mecrisp-Stellaris 2.3.6

  - Graphics routines now draw Unicode characters.
    Glyphs for ISO-8859-1 and ISO-8859-15 charset coverage included, you can add more.
  - Contribution by Werner Urech:
      New target: STM32L073RZ on STM Nucleo L073RZ

28.06.2017, Matthias Koch, Mecrisp-Stellaris 2.3.7

  - RA binary for STM32F051
  - More readable cordic code with arctangent
  - Routing tool to replace running definitions for debugging
  - Multitask debug tools
  - Contribution by Terry Porter:
      Svd2gas - converts SVD register definition files into assembler include files
  - Contribution by Ralph Sahli:
      New target: STM32F042F6

23.07.2017, Matthias Koch, Mecrisp-Stellaris 2.3.8

  - Bugfix for all multiplications involving double numbers on M0 targets. Only ud* was fine.
  - Added hook-find and (find) to RA cores

09.08.2017, Matthias Koch, Mecrisp-Stellaris 2.3.9

  - Bugfix for d< d> du< du>

03.09.2017, Matthias Koch, Mecrisp-Stellaris 2.3.9a

  - Contribution by Manfred Mahlow:
      Vocabularies and classes for Mecrisp-Stellaris RA
      on targets which allow separate 16 bit writes into flash memory
      which includes all TI, Silabs and STM32F... chips.

06.01.2018, Matthias Koch, Mecrisp-Stellaris 2.3.9b - 34C3 release !

  - Analog and blinky examples for "Calliope mini" board which runs fine with the Microbit binary.
  - New Thumbulator with partial M3 support to generate cores with precompiled sources.
    Currently available for LM4F120, TM4C1294, STM32F051, STM32L053, STM32F103 and STM32F303.
    Added first special autogenerated binary with USB drivers for STM32F3 Discovery board.
  - Contribution by Jean-Claude Wippler:
    Alternative M0 core emulator for Thumbulator adapted from Pinkysim.

28.01.2018, Matthias Koch, Mecrisp-Stellaris 2.4.0

  - New experimental target: cy8c4245axi (9600 baud bit-bang terminal and without flash write access for now)
  - Contribution by Andrew Palm:
      New target: STM32F030K6

11.02.2018, Matthias Koch, Mecrisp-Stellaris 2.4.1

  - Bugfix for <builds does> create on M3 and M4 cores with 16 bytes at once flash buffering
  - ." c" s" are now properly flagged as compile-only
  - Core version is now printed in words listing
  - Contribution by Terry Porter: Fresh SVD2Forth utility
  - Contribution by Andrew Palm:
      - Example collection for STM32F051
      - Trig and SQRT Forth code for s31.32 fixpoint

25.03.2018, Matthias Koch, Mecrisp-Stellaris 2.4.2

  - Defined VALUE and TO in Forth
  - Added brightness measurement with a LED for STM32F051
  - Contribution by Andrew Palm:
      - Improved trig and sqrt code
      - Sunset and sunrise calculations
  - Contribution by juju2013@github:
      New target: Nuvoton NUC123

30.05.2018, Matthias Koch, Mecrisp-Stellaris 2.4.3

  - Bugfix for thumbulator
  - Contribution by Andrew Palm:
      - Fixpoint math library
      - Date & time conversion routines
      - RTC code for STM32F051
  - Contribution by Terry Porter:
      - Updated svd2forth-v2
  - Contribution by Andreas Wagner:
      New experimental target: CY8C5888

11.06.2018, Matthias Koch, Mecrisp-Stellaris 2.4.4

  - Added arcsin and arccos to cordic library
  - Added buffer layer for flash controlers which supports 64 bit writes with ECC only
  - New target: Analog Devices ADuCM4050
  - RA binary for STM32F401
  - Cornerstone for STM32F407

24.08.2018, Matthias Koch, Mecrisp-Stellaris 2.4.5

  - Precompiled core for linux-ra
  - Fixed flaw in delay-ticks
  - Fixed adds/movs double disassembly flaw in disassemblers
  - Changed terminal to pullup input on STM32F103
  - New target: STM32L082KZ
  - Contribution by Robert Clausecker:
      ELF format self-replicator

23.11.2018, Matthias Koch, Mecrisp-Stellaris 2.4.6

  - Added Catch & Throw for use without multitasking
  - Added Lemmings animations
  - Contribution by juju2013@github:
      New target: Nordic nRF52832

03.12.2018, Matthias Koch, Mecrisp-Stellaris 2.4.7

  - Fixed flaw in Linux terminal that caused KEY to fail with input buffers of 256 bytes or more
  - Split multitask.txt into multitask.txt and multitask-examples.txt
  - New target: Numworks calculator
  - Contribution by Wolfgang Strauss:
      Forth drivers for Numworks calculator

29.12.2018, Matthias Koch, Mecrisp-Stellaris 2.4.8, 35C3 edition

  - Added UNUSED to all cores to get current amount of free memory
  - Added ansification.txt for adjusting Mecrisp-Stellaris as close as possible to standard Forth
  - Adjusted baud rate in XMC1100

14.02.2019, Matthias Koch, Mecrisp-Stellaris 2.4.9

  - Fixed flaw in depth and rdepth in case of stack underflows
  - Contribution by Terry Porter:
    - Added "color" assembler switch for a more beautiful prompt using ANSI escape sequences
    - Added "rtscts" and "autobaud" assembler switches to terminal code for STM32F051

22.05.2019, Matthias Koch, Mecrisp-Stellaris 2.5.0

  - Contribution by Rick Kimball:
      New target: STM32F030R8

  - Contribution by Jan Spakula:
      New targets: STM32L031K6 and STM32F072RB

24.06.2019, Matthias Koch, Mecrisp-Stellaris 2.5.1

  - Contribution by Terry Porter:
      svd2forth-v3 - A fresh register file generator from SVD to Forth

  - Contribution by Christian Nicolai:
      New target: STM32F103RB

14.09.2019, Matthias Koch, Mecrisp-Stellaris 2.5.2

  - New experimental target: LPC845M301, without compiletoflash support
  - Added Fakoo 3x3 pixel font

  - Contribution by Ralph Sahli:
    - New targets:  STM32G031F8  STM32G031J6  STM32G071RB

  - Contribution by Robert Clausecker:
    - New target: FreeBSD
    - Improved ELF handling

16.02.2020, Matthias Koch, Mecrisp-Stellaris 2.5.3

  - Fixed serious bug in RA compiler affecting comparisons:
      Many thanks to Ivan Dimitrov for the bug report !

  - Contribution by Peter Schmid:
      New target: STM32WB55

28.03.2020, Matthias Koch, Mecrisp-Stellaris 2.5.4

  - Added RA for STM32F411
  - Fixed eraseflash on XMC1100
  - Fixed Bresenham ellipse graphics routine

  - Contribution by Ivan Dimitrov:
    - s31.32 Fixpoint <--> Single float conversion utilities

28.06.2020, Matthias Koch, Mecrisp-Stellaris 2.5.4a

  - Added graphics primitives for circles in Forth

  - Contribution by Manfred Mahlow:
      VIS extension

01.11.2020, Matthias Koch, Mecrisp-Stellaris 2.5.5

  - Faster implementation of "find"
  - New experimental target: Palanqin by Robert Clausecker
  - Cycle counter example for debug module on some targets

  - Contribution by Robert Clausecker
      Palanqin ARM Cortex M0 emulator for Intel 8088

  - Contribution by Torsten Sadowski
      Line follower robot code for Microbit

  - Contribution by Mike Thompson
      Terminal for STM32F429 on Nucleo-144 board

11.02.2021, Matthias Koch, Mecrisp-Stellaris 2.5.6

  - New target: RP2040 on Raspberry Pico board
  - Fixed reset address in thumbulator

  - Contribution by Manfred Mahlow:
      Conditional compilation, Forth 200x style

  - Contribution by Christoph Kukulies:
      New target: STM32F407 on DIYMORE board

  - Contribution by Wim Verheyen:
      New targets:  STM32F767 and STM32H743

  - Contribution by Jan Bramkamp:
      Terminal initialisation and bootrom trampoline for RP2040

  - Contribution by Terry Porter:
      Register definitions for RP2040

7.03.2021, Matthias Koch, Mecrisp-Stellaris 2.5.7

  - Removed addresszero contruction for does> on M0 in favour of using relocation directives
  - Small improvements in RP2040 terminal code
  - Added Mandelboot, fractal artwork in boot sector of RP2040
  - Added Tinyblinky examples for STM32F051
