Re: [CAD_CAM_EDM_DRO] checking parallel port

Hi Jon, Hugo,

Also NEC, as I recall. If the BIOS has initialized them (set up config
registers), then they will function as the appropriate ports on the
selected addresses. You CAN identify which CHIP, and reprogram the
whole thing, but that shouldn't be necessary.

Alan KM6VV


Jon Elson wrote:

>
> JanRwl@... wrote:
>
> > Hugo:
> >
> > I imagine at least MOST PC's made in the last ten years have about the same
> > parallel-port output IC.
>
> Not quite. There are 2 popular chips, one from SMC and one from UMC. they both
> do parallel and floppy control, but are just a little different. These differences may
> be more in the area of IEEE-1284 timings than any other aspects, though.
>
> Jon