Re: Ahead "VGA Enhancer Z" adapter comes in

"David Ress" <daress@xxxxxxxxxxxxxxxx> wrote in message
news:daress-3E09DE.08113516092005@xxxxxxxxxxxxxxxxx
> Hello David,
>
> > Peter does have both ADFs. Surprised me that the previously unknown
> > jumper picked the Adapter ID. Documentation is well worth the money I
spent.
>
> Thanks for putting the information up. As I am still in the process of
> designing an adapter, I find it very intruiguing that this adapter
> supports multiple adapter IDs. I find it very foward thinking of the
> designers, especially after reading their comment that all MCA adapters
> should have a unique ID, but they are providing a jumper to change that
> in the event you need to do so.

Although the MicroChannel Architecture intended for every adapter to have a
unique Id., because IBM reserved swathes of Id.s for their stuff from the
~65535 available, this became a bit of a turkey-shoot. The implementation of
the Id. for setup is pretty straightforward and could be customisable with
jumpers, provided the Id.s assigned are registered with IBM or whoever
manages that address space now. The ATI GUP changes Id., if you jumper it to
disable the on-adapter base VGA functionality, too, for example.
--
Regards,
Tim Clarke (a.k.a. WBST)


.

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