Morning Session
CH Ting - New Actel FPGA Board with eP32
Tim Duncan - Digital Music using Forth
- LaFarr Stuart - An Experiment in Stack Oriented
Variable Precision Arithmetic
- LaForth and
Arithmetic Programs
- Pi
expansion
I used Square Root of 2 for a couple reasons in preference to Pi
in my Forth Day example.
-
I think most people are more interested in Pi and that
interest may motivate them to try to do it. If I had done Pi, everyone would
probably just look and nod, but to learn one has to do more.
-
It is quite remarkable that if you square any of the sqrt(2)
fractions, the numerator is always just one off from being exactly twice the
denominator, showing how close the approximation is.
-
It is a very simple continued fraction (C.F.) which repeats
for ever. This is a C.F. property for the Square Root of any number. (The
repeating sequence often is more than a single digit.) Some examples, I will
put the repeating part in ()'s
- Sqrt(3)=1,(1,2)
- Sqrt(5)=2,(4)
- Sqrt(6)=2,(2,4)
- Sqrt(7)=2,(1,1,1,4)
- Sqrt(10)=3,(6)
- Sqrt(17)=4,(8)
- Sqrt(26)=5,(10)
I included the last three above because it looks like the
C.F. sequence for sqrt(n**2+1) always has a repeating sequence of only one
digit. At the moment, for me, this is only a conjecture? I wonder if it is
provable?
-
It is quite easy to recognize when one number is nearly
twice another (item 2 above) which makes 2 preferable to Pi or other Square
Roots.
Afternoon Session
- Kevin Appert - Forth Links, Resources, and Success
Stories
- SMART Antenna uses Forth running on over 100 processors
steering a phased array microwave receiving antenna. (press
release).
- Al Mitchell - amrFORTH Version 6
- Forth Dimensions - scanned pdf of the first 6 years
- amrFORTH V6
- Randy Thelen - Mippy - TTL Forth
- Presentation
- Block diagram
- Joseph M. O'Connor - A Forth-like Scripting
Language in Borland Delphi
- Creole Forth Webpage
- SVFIG Forth
Day handout
- CD-ROM available - send email to Kevin Appert
- Jeff Fox - Special presentation
- OKAD VLSI Design Tools
coded in ColorForth - BAD url
- Algebraic GUI for P21 and F21
- Machine Forth on PC
- Color Forth for DOS
- Color Forth for X-Windows
- Coloe Forth for Windows
- Able to boot Color Forth from USB flash disk
Miscellaneous
Oscar - Amateur Satellite
Corp.
IPS
Programming Langauage
Tcl and the Tk Toolkit
John K. Ousterhout
IBSN
0-201-63337-X
An Embedded
Life by Jack Ganssle
From: Embedded Systems Programming
Batteries Plus can
replace cells in laptop battery packs
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