## Morning Session
**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
## MiscellaneousOscar - Amateur Satellite Corp. Tcl and the Tk Toolkit An
Embedded Life by Jack Ganssle Batteries Plus can replace cells in laptop battery packs |