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
- 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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