On Mon, 19 Oct 1998, greg walsh wrote:

> At 12:55 PM -0700 on 10/19/98, you wrote:
> 
> >On Sun, 18 Oct 1998, Henry B. Hotz wrote:
> >
> >Have youi tried setting clock rates on both pins on the printer port?
> >Without those, the changes (which I think are) in this kernel will do
> >nothing.
> 
> Hey Bill
> 
> I haven't tried setting the clock rates yet.  I ran into a small
> problem (my ignorence) trying to install Henrys kernel.  He posted me
> with the solution to that, and I'll give it a try later today.

Henry's kernel will do nothing different if you don't set the clock rates.

> I'll need to call epson to get the clock rates for the printer, I'm
> doing that today as well.  I poured over all the tech specs that came
> with the printer, but that particular piece of info wasn't included.
> Guess they never planned on somone wanting to run it on a unix box
> without a network card.

"1" should be good enough to boot.

The clock's value does two things. One, if it's non-zero, then a lot of
hooks get turned on to ensure that we don't enable interupts on the
relevant pin. Second, if we are requesting a baud rate which can be better
generated using the clock on that pin and its division circuitry, we use
the pin instead of the internal BRG.

I bet it's something like 3.68 MHz.

> Once I get Henry's kernel running and the printer clock sync'd I'll
> report back.

One problem you might run into is that it might be running in HDLC mode,
which is more like LocalTalk. We don't support it yet. :-(

But a clock value of "1" will certainly get it to boot. I hope.

Take care,

Bil