Re: [PARPORT] Meaning of ECPPS2.

Eugene Weiss (
Fri, 21 Jan 2000 12:58:05 -0500

According to the information printed on the chip it's a Winbond W83877F. It's
the onboard controller for the parallel port and two serial ports for an ASUS
P/I-P55T2P4 motherboard. The ASUS manual it's a "Super Multi-I/O", though I'm
having trouble getting my enthusiasm up for it...

> > I had thought that this meant that the port would emulate PS2 mode if
> > the proper value (0x20) were written to the ECP control register
> > (0x378 + 0x402).
> That's what ECPPS2 is trying to say, yes. However, the PS/2 test is: do I
> read back a different thing than I wrote to DATA? So the PS/2 test passes
> even for ports that aren't there.. :-(
> > Can anyone tell me what ECPPS2 is, and if it can be made to act as a
> > PS2 port, or otherwise where I can find documentation on how it
> > functions?
> Who's it made by?
> Tim.
> */

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