Juan Cubillo wrote:
> Why is it that some programmers (wisp628, kit 149, GTP-USB, etc)use
> PICs in them to controll programming?

Because those people designing PIC programmers are generally familiar and
comfortable with PICs.  Besides, it's hard to find tools for a 4004 anymo=
re.

> If the old programmers like icprog or elcheapo are able to control the
> clock, data, and mclr lines, why can=B4t you just add support for newer
> PICs to their software.

Why can't I?  I probably could, but I don't feel like it.

> As far as I know all(?) PICs use the same
> method to load data into them.

At the low electrical level and for transferring bits, yes.  However the
higher level protocols are very different between PICs.

> Is there any good reason to use controllers inside programmers VS
> computer controlled lines?

Lots, else nobody would have gone thru the trouble of designing more
complicated programmers with controllers in them.


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