Re: [CAD_CAM_EDM_DRO] Hardware step generator idea

hmmm...
youve already got a single channel prototype of the hardware
use a couple bits on the parallel port for direction and enable
and the PC speaker is driven with an 8254 with gated output
should be enough for testing

the rest is in software,there is plenty of old source code for the
PC speaker floating arround that will still run on the newest chipsets

Brian

On Monday 21 May 2001 04:46, you wrote:
> It seems to me that this card could take the form of an 8254
> programmable timer (3 channels) running from a suitably fast clock
> source and something (74hc373, 8255) to provide bits for the direction
> signal. (Software might also need to control the 8254 gate output when
> zero speed is commanded)
> Chris
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