June 2010 Meeting Notes
Compiled by Dave Jaffe
Contributions from Kevin Appert and others
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09:50 |
Coffee and a Chat |
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10:00 |
Oscillator in Forth - Bob Nash
Bob will
describe the direct digital synthesizer (DDS) signal generator (with display)
he built using Charley Shattuck's MyForth. An interesting challenge was doing
quad multiplication on an 8-bit machine using a modified Russian Peasant
algorithm. This was needed to calculate the number for the frequency display
(no hardware was needed to measure the frequency).
- Russian Peasant Multiplication in
MyForth
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10:50 |
Variations in the Key of MyForth - Charley
Shattuck
"I'll try to have something ready to add to Bob's presentation
concerning difference between MyForth for 8051 and Forduino (MyForth for AVR).
I'm currently having trouble talking to my Arduino board so it may be mostly
theoretical." |
|
10:50 |
PrismForth - Brad Nelson
Brad will present his
progress toward yet another web-based Forth, drawing on lessons learned from
RainbowForth (web/native) and IconForth (web). Both previous systems suffered
from over-coupling of Forth and non-Forth code. This time, a minimum of
non-Forth code will be used to bootstrap the system: python for a shared block
store, javascript to implement a Forth friendly virtual machine and small boot
loader. From the point of view of Forth code, web based execution will resemble
running on a simple idealize Forth-y CPU. Just to mix things up, this time,
conventional Forth syntax will be used. |
|
11:45 |
Lunch
We will walk to
The Treehouse by
Tresidder Union. Here is the
menu.
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12:40 |
HP200A Oscillator
After lunch, we'll walk over to the
Packard Building to check out the
HP200A
Oscillator on display, along with other artifacts as time permits. A
similar oscillator was featured on Antiques Roadshow and it can be seen
starting near 30:00
into the program. |
|
13:00 |
Introductions, Announcements, Discussions, and Gossip -
All Assembled |
|
13:30 |
View of a Faire - Dave Jaffe
Dave will share
his photos from the Maker Faire.
- A
maiden visit to Maker Faire
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|
14:00 |
Digital Chart of the World - CH Ting
"I got
this Digital Chart of the World on the USGS website, code name
GTOPO30.
It is a huge data set (1.7 Gb) covering the entire earth with 30 arc-second
resolution. I am trying to plot maps from this data set. I like to display the
globe, rotate the globe to any angle, and expand an area to the limit of the
data set, similar to the way I played with the Mandelbrot set." |
|
15:00 |
How the Web is Changing Programming - John
Slater
"The special demands and competitive landscape of web programming
has created a shift in the way people program. I will cover these changes and
invite audience input as to how Forth can respond to this." |
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16:00 |
Adjourn |
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Other items:
- Forth
- Pocket Forth
- Website
on WayBack Machine
- Review
- Doug Neale's
Personal Web Site - Forth
- Forth on
Kosmix
- PowerMops Forth Programming
Language for Macintosh
- Software
- FICL
- Hardware
- Books
- Forth Jobs
- AMD
- Belcan
- Chrysler
- Other
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