Re: How PC parallel port Is connected internally?

chris wrote: 
Ali wrote:

Yeah this post belongs to windows drivers. Actually this was the
question raised by windows driver group people, they all want to know
which type of device i have , PCI or ISA?
If you want to see the device then please vist
[http://powercell.cjb.net] under hardware design link.

Thanks.

What you *connect* to the parallel port does not matter much - it's a "parallel port" bus if you like to call it that.

What happens *internally to your PC* is what the people in the windows driver groups are asking.

In the first years of PC design the parallel port interface was handled by an 8255 PIO chip connected to the ISA bus of the computer.


It was not a 8255, but a bunch of TTL registers and gates.
I still have the original IBM/PC Technical Manual showing it.

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Tauno Voipio
tauno voipio (at) iki fi

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