----- Original Message -----
From: Arno Verhoeven <[EMAIL PROTECTED]>
To: linux-hams <[EMAIL PROTECTED]>
Sent: Thursday, December 09, 1999 11:52 AM
Subject: Re: 2 SCC cards
> Richard Adams wrote:
> >
> > On Wed, 08 Dec 1999, Jean-Jacques Duquenoy wrote about, 2 SCC cards:
> > > Hello,
> > >
> > > I would like to use 2 SCC at�pra cards .( PA0HPZ like).
> > > I read, sometime ago, to use : vector=0 .
> > > Do i declare "vector=0" in Z8530drv.conf for the four chips ?
> >
> > Well the PA0HZP card itself needs a different PAL on the second card, i
> > have not used a second card under linux but i suspect it needs to be the
> > same as it would under dos for the reason that the PAL has the address
in
> > it, the first card is always 0x168 the second would then need another
> > address.
> > So as i see it the first board stays the same, the second would be
defined
> > with its own address.
>
> I've used 2 PA0HZP cards in a Linux box.
> Both cards will have the same vector address (the driver only accepts
> one vector address for all SCC's anyway :-)
> But the two cards will have a different i/o address. The standard PAL
> that is in a PA0HZP card gives you an I/O address range starting at
> 0x150. The second card needs a different PAL. The I/O address range will
> start at 0x158.
> Both cards need to be linked with (if I remember correctly) a 5 pin
> interconnection cable.
>
> 73, Arno pe1icq
>
Of course , my two cards have different PAL adresses , one start at adress
0x150 , the other start at 0x158.
When i use only SCC 150 , i use to declare Vector=0x168 , with SCC158 only ,
i use to declare Vector=0x160 so the question is :
with both cards installed , i have to declare only one vector adress , so
should it be :
Vector=0x168 , Vector=0x160 , or Vector=0(as i read somewhere).
I read, that the two cards ,could be linked with a 5pin interconnection
cable, to share one IRQ for the two cards.I think it's not mandatory but a
usefull hint to save a precious IRQ.
73 ' Jean-Jacques F5LXS
[EMAIL PROTECTED]
