Description:
Discussion about Forth.
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evplace (eigenvalue placement)
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I wanted to compute a state-feedback matrix K such that
the eigenvalues of Phi-Gamma*K are those specified in a vector P. Phi and Gamma are defined as dx/dt = Phi*x + Gamma*u, with x the state variables and u the inputs of some system. The subproblem that caused me some unexpected headache was... more »
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MultiTaskingClass.f released
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I just released MultiTaskingClass.f
This is an update of the previous MultiTask.f
Changes in the MultiTaskingClass.f:
- Moved the task-block out of the dictionary for the taskobjects
- Added cells+@ cells+! #ActiveTasks: task>cfa task>&StkParams
and the waitobject wTask including a demo for wTask.... more »
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www.prevayler.org say you wanted a database, which logged updates to disk
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and then you could write whole database to disk every so often
how would you concoct this using forth?
you would need to get web requests and run queries against the data in
ram so you have fast queries and then log any data updates first to
logfiel followed by the data structures in ram
if cash read in last database dump and rerun logfile updates against... more »
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more little development boards
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These use the Atmel Atmega32u4, an 8-bit micro with 32k flash, 2k ram,
1k EEPROM, 2 cycle 8x8->16 multiplier, a/d-d/a, gpio's, etc. An
interesting feature is a USB client port built directly into the chip.
It runs at 16 mhz and as such is probably a bit slower than an MSP430
and it costs more too, but there are some nice small relatively cheap... more »
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ANN: Update of libX11 files for kForth
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There has been a significant update of the X11 library interface files
for kForth. If you are playing with X11 programming in kForth, please
ensure you have the latest versions of the files at
[link]
Revisions include:
-- Addition of the file Xutil.4th (provides additional data structures... more »
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CFP - DEIS2012 - Czech Republic - SDIWC
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Dear Colleagues,
We are inviting you to join and participate in the upcoming conference
that will be held in Czech Republic. This will able to build
connections among researchers in the field of digital applications.
Please spend some time to overview the research topics.
Below are the conference information. If you have any questions, you... more »
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Another take on a typed tester
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[link]
I wrote this back in November, and then promptly forgot about it until a
couple of days ago when I needed to test some string manipulation words.
It seems to be complete. I banged on it for an hour or so and it
doesn't seem to be brittle the way my last try (2008 sometime?) was. So... more »
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compile to ram compile to flash
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Hi.
Is there a comon used notaion or name for a forth word to redirect
compilation memory segments? So compilation of new definitions may go
into RAM intstead of flash memory for example?
MSP430 intructions execute in both memory segments, RAM and flash
alike. So I would like to test compile to RAM, and when definition is... more »
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