Beschreibung: Beschreibung: Beschreibung: Beschreibung: Beschreibung: Beschreibung: Beschreibung: Beschreibung: Beschreibung: Beschreibung: Inventio Software

Specialist Instrumentation Design and Programming

Inventio Software Ltd, 568 London Road South, Lowestoft, Suffolk, NR33 0LF

(+44) 01502 589198 Mobile (+44) 07954 580 833

email : howerd (at) inventio (dot) co (dot) uk

Inventio Software Ltd - registered as a computer consultancy in the UK since 1985, and as a limited liability company 2000 Jul 07

Howerd Oakford specialises in real-time, embedded, internet enabled programming where program size, speed or reliability are critical. Also the hardware to run it on - micro-controller instrumentation and system design. Click here for my CV ,or download it in Word format. I like the Forth programming language – please see the links below…

Inventio is Latin for "discovery". Software is what makes a computer do what you want.

Latest News!

Corrected two typos in the HDLC CRC16 calculation in Forth :

crc16hdlc.f crc16.zip ( the zip file now contains all three CRC16 files )

\ *****************************************************************************

\ crc16hdlc.f 2012 Apr 11

\ CRC-16 for HDLC calculation using a table

\ 16 bit FCS lookup table per RFC1331

\ Thanks to :

\ http://www.mavi1.org/web_security/cryptography/hashes/crc/crc-16-hdlc.c

\ Note that this code defines "#define FCSGOOD 0xF0B8"

\ whereas I define "$0F47 constant CRC_VALID" which is bitwise inverted.

\ This is because CRC16 returns the actual value to be sent in an HDLC packet

\ Also note that at least one online CRC calculator does not include this CRC.

\ *****************************************************************************

…and added two new CRC16 calculations in Forth :

crc16modbus.f as above for ModBus

crc16-a.f as above for ISO10373 and ISO14443 type A (and B )

Cweed V4.1 2012 Mar 13 Now with support for C++, Lint and with Folder Scan, and works under Windows7! And NumName human readable hash values…

Download cweed4v1.exe self-extracting zip file.

Download cweed4v1.zip zip file.

New in V4.1

Minor bug fixes in Folder Report and new NumName.txt file “monsoons-megabyte”

New in V4.0

Fixed lack of update when the Cweed window is covered, added NumName text feature to give the file MD5 hash a human readable form – see NumName.f for details.The NumName.txt file list of words is now precompiled.

Announcing Win32Forth6v05H.exe ( and Win32Forth6v05H.zip zip version ) , the Win32Forth system used to create win32for.exe, as supplied in the Cweed packages. The ‘H’ is for Howerd, although I have kept as much of the original V6.05 as possible.

This version of Win32Forth runs under Windows7 ( Ultimate 64 bit ) and does not offend my anti-virus program.

I have kept the original help file by Tom Zimmer et al. but moved it to load from the local directory without having to have the source tree present. This means that it works with the Cweed package. I merged changes in the OS detection words from V6.14 so that it recognises Windows 7…

I have also added some aliases such as

loc for locate , to locate a word’s source,

\\ for \S to end compilation of a file

and some new words :

g to invoke the editor, and

tt that, if you are in directory Cweed, will load file Cweed.f

There is a readme.txt file to get you started, and the exe package ( over 13 Mbytes ) unzips and runs with minimum fuss.

Gerber RS-274-D to RS-274-X File Format Conversion

I am offering what I hope is a very competitive service to convert RS-274-D format Gerber files to the new to RS-274-X standard.. click here for details.

New Forth book online : Chuck Moore, the inventor of the Forth programming language has published his book from 1970 online. It gives a fascinating insight into the rationale behind Forth : PROGRAMMING A PROBLEM-ORIENTED-LANGUAGE, Charles H. Moore

Please note our new address :

Inventio Software Ltd

568 London Road South

Lowestoft

Suffolk NR33 0LF

United Kingdom

Text

My thoughts on Forth

My EuroForth papers collected together here :

2003 The colorForth Magenta Variable an emergent property of a new programming environment

2003 Three Forths Make a Hole how Forth made the extremely difficult happen

2001 colorForth and the Art of the Impossible the title says it all

2000 The Point to Point Protocol in Forth Hayes, PPP, IP, UDP, IPCP for 16 bit micros

1998 Multiple Language Programs Made Easy what you can do with a simple compiler

1997 Forth : Past, Present and Future an attempt to understand Forth

Forth and Not C (why you shouldn't use Forth ;)

Forth Versus C (why you should use Forth ;)

Token-based Programming for Compact Code getting the most out of the Atmel 89C2051

Software - The following are available for free download!!!

cf2010 colorForth system with all sources and easy to use floppy disk writer!

View the readme file here

Full assembler source files, NASM assembler, colorForth source and DOS batch file to create the colorForth image, plus floppy.com to download it to a floppy disc :

Download the zip file here cf2010_4v1.zip and self-extracting zip file here cf2010_4v1.exe

cf2010bochs colorForth system packaged with Bochs

Real colorForth running really slowly...

A tradeoff between working on (just about) any Windows PC against execution speed.

Double left click ( run ) go.bat to start the cf2010.blk version of colorForth

in a bochs PC emulator.

bochs is available from http://bochs.sourceforge.net/

bochs is truly wonderful! Thank you to all the bochs developers...

Download the zip file here cf2010bochs.zip and self-extracting zip file here cf2010bochs.exe

Some of my software tools - I hope they are useful...

Software Algorithms - ANS Forth for 32 bit PC Forths, mostly mathematical, also Windows Sockets API wsa.f , I hope you find them useful!

PCIdev PCI device viewer. Even works under WinXP/2K/NT (with some help!) This program may be of special interest to potential colorForth users to debug troublesome hardware...

PPP.com is a DOS based program to analyse, display and create PPP and Internet protocols. PPP.com is the current evolution of a general purpose scripting environment, adapted to the Point to Point Protocol. Currently it can open a PPP connection to an ISP and send DNS, ICMP, UDP or TCP packets to any IP address on the Internet. PPP.com has not been optimised for program size, as it is a 16 bit Forth program, and nearly fills up the maximum 63K bytes allowed for a .com program. This includes 4K of help text, roughly 3K of protocol descriptor text, an editor, 8086 assembler and Forth compiler. It supports five tasks, two of which monitor PPP and IP packets on each of COM1 and COM2 serial ports. It is programmed in a 16 bit DOS 8086 Forth to allow easy porting to 8 or 16 bit embedded processors.

Cweed is a C source file weeded and scanner. It only changes whitespace (formatting) and does not otherwise change the content of the file. This is analogous to weeding a garden, where the plants are left untouched but the bits between may be seriously modified. Cweed is an experiment in specifying a coding standard in the form of an executable program. Cweed is also useful for scanning a file for control characters, removing tabs, or just viewing what is actually there, not processed and formatted by an editor.

cfdos is a DOS program to display colorForth pre-parsed source blocks. This program will work on any computer that runs or emulates DOS, and allows you to view colorForth source, in both normal and "colour blind" mode. It features a file listing utility (F6) which displays all files of type *.BLK in the same directory, and can copy them to a formatted floppy disk. colorForth Explorer Edition is the latest colorForth stand-alone operating system, packaged together with a Windows/DOS program to display colorForth source and create bootable floppy disks.

Don't be deceived by the fact that colorForth boots from a floppy - this is an experimental state-of-the-art operating system for a PC.

See The colorForth Magenta Variable and colorForth and the Art of the Impossible my first impressions of colorForth

Links

So you want to know more about Forth? Hint : when searching for Forth related material on the Internet, use “in Forth” as the string, as this excludes the use of the English word “forth” as in “back and forth”. E.g. Google for "in forth" tutorial

Forth Links

http://www.angelfire.com/in/zydenbos/WhatisForth.html (by R.J Zydenbos)

www.forth.com (Forth, Inc. , ANS Forth supplier)

http://www.mpeforth.com/ (MicroProcessor Engineering , ANS Forth supplier)

www.holonForth.com (HolonForth , HolonJ for Java, HolonX for XML - a novel database Forth/Java/XML environment)

FIG (the Forth Interest Group)

Forth Java applet (try out Forth online!)

Forth Underview (by Peter Knaggs)

Why Forth (a personal view, very much the same as my own, from Brad Rodriguez)

Forth Books Online

http://home.iae.nl/users/mhx/sf0/sf0.html Starting Forth

http://thinking-forth.sourceforge.net/ Thinking Forth