is an interactive stand-alone forth for
Albert Nijhof & Willem Ouwerkerk
Last update 30oct2020
Put the noForth image on a processor board
and then program the chip using any serial terminal.
Now that there is also a noForth for RISC-V processors (october 2020), we
have the following noForth variants:
r, rv, rc, rcv,
and m, mv, mc, mcv.
|= for RISC-V
= for MSP430
= with vocabularies
The priorities for noForth: 1. robust and comfortable, 2. fast, 3. compact.
For the compact variants: 1. robust and comfortable, 2. compact, 3. fast.
"Low Power" noForths (for MSP430) are marked with a dash: noForth m-, mv-, etc.
In the list below you find the noForth images for MSP430 (Intel-hex) and for RISC-V (binary).
It may be necessary to adapt the CONFIG list (settings for Baud rate, Clock speed, etc.) in the noForth Intel-hex files. Follow the instructions in the README file.
The image contains only the noForth kernel without the tools, assembler or disassembler.
Once noForth is in the chip you have to include the file
<noforth r tools.f>
or <noforth m tools.f> for .S WORDS MANY DMP and SEE.
noForth binary files for RISC-V (210701 yymmdd)
RISC-V GD32VF noforths gd32vf103.zip
noForth Intel-hex files for MSP430 (201030)
MSP430FR2433 noforths 2433.zip
MSP430FR2x55 noforths 2x55.zip
MSP430FR5739 noforths 5739.zip
MSP430FR5969 noforths 59x9.zip
MSP430FR5994 noforths 5994.zip
MSP430F149 noforths 149.zip
MSP430G2553 noforths 2553.zip
MSP430G2955 noforths 2955.zip
How to get noForth in ..
How to get noForth in the RISC-V?
howto seeed studio gd32vf.pdf
howto sipeed longan nano.pdf
How to get noForth in the MSP430?
Put the noForth image in the MSP430 with the 'UniFlash' program (by Texas Instruments).
See howto use uniflash
Uniflash will not function with the MSP430F149.
See howto f149
With the FET-interface on the MSP-EXPFR2355 all MSP430 chips
(with the exception of the 100-series) can be programmed.
See msp-exp430fr2355 as programmer
seeed studio gd32vf dev board.pdf \ 128kB FROM, 32kB RAM
sipeed longan nano board.pdf \ 128kB FROM, 32kB RAM
msp430f149 minim core board.pdf \ 61kB FROM, 9600 Baud rate
msp430f149 dupont board.pdf \ 61kB FROM, 9600
msp430f149 mini-v3 board.pdf \ 61kB FROM, 9600
msp-exp430g2.pdf \ 16kB FROM, 9600
msp-exp430g2et.pdf \ 16kB FROM, 9600
msp-exp430fr2433.pdf \ 16kB FRAM, 115k2
msp-exp430fr5739.pdf \ 16kB FRAM, 9600
msp-exp430fr2355.pdf \ 32kB FRAM, 115k2
msp-exp430fr5969.pdf \ 64kB FRAM, 115k2
msp-exp430fr5994.pdf \ 256kB FRAM, 115k2
msp430g2553 on egel kit.pdf \ 16kB FROM, 38k4
msp430g2955 on cosey robot.pdf \ 56kB FROM, 9600
Egel project (MSP430)
consists of about 50 elementary examples of hardware control
with noForth on the MSP430.
In each example you find a file with forth code, documentation
and links to more information on the internet.
Four answered questions about noForth
What do I need to get my program compiled in noForth?
noForth receives the text, translates it into code and compiles that in flashrom.
You need a simple communication program which is able
to send text to noForth on the chip.
(Teraterm for Windows,
CoolTerm for OS X,
e4thcom for Linux, ... )
Will compiled code stay in flashrom after a power off/on?
No, unless you have sent the command
Is it possible to erase 'frozen' code?
Yes. Executing a MARKER or a SHIELD erases the code that is compiled after it.
Is it possible to change clock speed, Baud rate,
serial port, port and pin for the APP button from within noForth?
Yes, see the documentation in
r/configs gd32vf.html for RISC-V).
Before you start
Since noForth compiles in FlashROM,
it is unavoidable that some words don't behave exactly as the standard prescribes.
We tried, without restricting the programming freedom, to minimize
the aberrations from the standard.
See readme-1 and readme-2 below.
This concerns the words:
HERE ALLOT ! C! +! MOVE (only RAM)
, C, (only ROM)
noForth skips characters greater than hex 7E in the input stream.
WORD does not exist in noForth.
BL-WORD instead of
BL WORD .
Compiling: the NEXT of FOR-NEXT.
NEXT is state-smart
Executing: the assembler-NEXT of the inner interpreter.
Only for MSP430 without vocabularies:
Compiling: the forth-# for number printing.
# is state-smart
Executing: the assembler-# that denotes a literal.
In noForth assembler the msp430-AND is
XOR (forth vs. assembly)
In noForth assembler the msp430-XOR is
This is in harmony with the existing msp430 commands
Documentation and program files
Readme-1 \ RAM and ROM
Readme-2 \ FREEZE and FORGET
session1.pdf \ BASE and the prompt
input stream.pdf \ About the input stream
noforth documentation.pdf \ 201030
how noforth is made.pdf
For noForth r (RISC-V)
noforth r tools.f \ 201030
noforth r das.f \ noForth r disassembler 201030
noforth r more words.f \ Code for more standard words
noforth r asm.f \ noForth r assembler
risc-v asm notation.pdf \ RISC-V asm notation in noForth 210601
commacode for risc-v.pdf \ How to use it
noforth r metacompiler.zip \ 210701
For noForth m (MSP430)
noforth m tools.f \ 201030
noforth m das.f \ noForth m disassembler 201030
noforth m more words.f \ Code for more standard words
noforth m asm.f \ noForth m assembler
msp430 asm notation.pdf \ MSP430 asm notation in noForth
commacode for msp430.pdf
Beethoven430 \ Music on the launchpad
noforth m metacompiler.zip \ 200202
This noForth software is free software:
you can redistribute it and/or modify it under the terms
of the GNU General Public License as published by the
Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
This software is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
How to make a turnkey system
' <my-application> TO APP FREEZE
Put the application token in the value APP and type FREEZE .
The execution of the APP vector can be bypassed with a switch.
noForth is written 'from scratch'
- Floored division
- With decompiler
- CATCH and THROW
- With meta compiler
- Fast FIND (eight threads)
- KEY KEY? and EMIT are vectored
- Adjustable prompt, for extra information
- VALUE with prefixes TO +TO and INCR
- Missing core words are available as source
- Assembler and disassembler available as source
- Forget-functions (MARKER and SHIELD) do not spill Flash memory
- When an error occurs while loading a file, noForth will ignore the rest of the file