Walsh circuit now up

[Rene Schmitz]

Hi all,

Wouldn't it perhaps be a little less complex, when using an (E)EPROM with
the precompiled walsh functions? Four 8-bit wide EPROMS would do the trick
for a 32nd order system. Feed the counters output into the adress lines,
instead of dozens of XOR gates. And the same circuit could be used as a
waveform synthesizer too, since there is plenty of memory left! Or a form
of programmable logic could help. GALs, PALs, FPGAs or the like.
(Before all cry out that they don't have a burner: EEPROMS can be written
in the same way than SRAMS, only a little bit slower to write, but reading
is nearly as fast as with an SRAM. It should be very easy to make a EEPROM
programmer for a computers centronics port.)

Btw, I think walsh functions have interesting properties, for pattern
generation. One could create complex rythm patterns combining a few of the
functions with standard gates. Probably takes some time to get used to. 8
or 16 functions would be sufficient for that. And since high speed isn't
needed one could even do them with a uController.

Bye
 René



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