[LinuxPPS] PPS driver for ISA bus

[Bernhard Schiffner]

Am Mittwoch, 24. Oktober 2007 08:58 schrieb Rodolfo Giometti:
> On Wed, Oct 24, 2007 at 01:21:22PM +1000, Cirilo Bernardo wrote:
> >     Is there any value in writing a PPS driver for ISA bus interrupts?
...
> >     I imagine 2 such drivers - one which works with any generic ISA
> >    interrupt, and this may be useful when connected to a timing
> > standard. 
>
> No, even if I don't understand exactly what you need. :)
>

Rodolfo,

it's easy to make a simple PCB for ISA which only connects Ground (perhaps 
XClock and +5VDC) and _one_interrupt_line_.

So the question is, how to add some PPS-detection into the ISA-bus ISR.

Where to start?

Bernhard