Re: [PARPORT] PPA Zip: unsupported message byte 187 received
Tue, 21 Sep 1999 10:28:28 -0400 (EDT)

> After much messing around, and to my great embarrassment, I have found the
> solution to my Zip drive in PS/2 mode problem.
> It's nothing to do with the driver, but an undocumented jumper on the dual
> parallel card marked HI/LOW. You might have guessed by now that this ties the
> end of the pull up resistors to either 0V or +5V, and for some bizarre reason
> the card is supplied with this jumper set to low! It's only today when I took
> the card out to try changing the chips around that I noticed it...
> Why the default is low when the spec says pins pulled high I don't know, but I
> do know I'm glad it's all sorted out, even if I did waste countless hours
> inserting printk() statements into the ppa code in an attempt to debug it!

I'm glad to see this resolved. PLEASE post the full details of this
card so we can recognise this problem if it arises again.

Grant R. Guenther

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This archive was generated by hypermail 2.0b3 on Tue 21 Sep 1999 - 10:29:42 EDT