Walsh Functions

[Gene Zumchak]

Terry recommends jumping up to the HC11 for a processor.  This is about ten or
more years old and Motorola is trying to phase them out.  I'd jump a little higher
to the HC12.
The MC68HC812A4 has 4K of on-board EEPROM, 16-bit bus, narrow or wide expansion to
4M of program.  Two UART channels.  (One for monitor, one for MIDI?)
An A/D, 1K of RAM, all kinds of I/O.  It runs at 16MHz (8MHz bus).

Gene Z.



KA4HJH wrote:

> >Using a micro to do all the maths sounds like fun.  Especially the 6800.  Why
> >not try the more modern, and more powerful, 6809?  Doing the maths might be
> >slightly easier as it can do simple 16-bit maths directly, and has two 16-bit
> >index registers, gobs loads more indexing modes, etc etc.  If you're going
> >to be
> >triggering off a VCO and if you're going to be using a reasonable number of
> >Walsh terms, eg. 31 (so the VCO is running 5 octaves up), you'll need to
> >do the
> >maths pretty quickly.  Still, should be interesting!!!!!
>
> The 6809 is still around but pretty much obsolete (great in its time but
> try and find a development system now). Jump up to the 68HC11. 16 bit
> registers, multiply and divide commands (may be missing a couple of the
> fancy addressing modes but I can manage). Processor cards/development
> systems are cheap and readilly available. See the adds in Circuit Cellar
> Ink. A very popular processor and an easy transition from the 6502/6800.
>
> BTW, I heard there's a company that makes 300MHz 6502's...or something like
> that. EEYOW...
>
> Terry Bowman, KA4HJH
> "The Mac Doctor"