I bought a lava card yesterday, hopefully it will work.

i

On Thu, Jan 27, 2011 at 8:34 AM, Peter C. Wallace <p...@mesanet.com> wrote:

> On Wed, 26 Jan 2011, gene heskett wrote:
>
> > Date: Wed, 26 Jan 2011 21:45:04 -0500
> > From: gene heskett <ghesk...@wdtv.com>
> > Reply-To: "Enhanced Machine Controller (EMC)"
> >     <emc-users@lists.sourceforge.net>
> > To: emc-users@lists.sourceforge.net
> > Subject: Re: [Emc-users] Second (PCI) parallel port card
> >
> > On Wednesday, January 26, 2011 09:27:46 pm Peter C. Wallace did opine:
> >
> >> On Wed, 26 Jan 2011, gene heskett wrote:
> >>>> The NetMOS/MOSChip chipsets are known _not_ to support EPP mode
> >>>> properly so will not work with Mesa/Pico/Pluto FPGA cards. They will
> >>>> work fine if you just want more I/O however.
> >>>
> >>> Thanks Peter.  Now, to remember that when I do want to use it, that is
> >>> the problem.
> >>>
> >>> What specifically fails?
> >>
> >>
> http://www.mail-archive.com/emc-users@lists.sourceforge.net/msg11230.htm
> >> l
> >
> > This reads amazingly similar to a problem I had with an eprom burner I
> made
> > while at a radio station in NE CA in about '81 or '82, with about $25
> worth
> > of parts, where the chip running the show was a Zilog Z-80.  I was not
> able
> > to get a reliable write through my buffers and at the lines of the eprom
> > socket in time to get a good latch even with FAST parts, so I gave up and
> > called Zilog.  Their response was that they thought ever one knew that
> when
> > the bus cycle started, if /READ wasn't true, then it was going to be a
> > write and that I should enable the buffers at the start of the cycle
> > anytime /READ was high.  That gave me another 100ns or so to get every
> > thing in one sock and worked flawlessly.  But there was no hint in the
> > published docs about such a prediction method.
> >
> > Now, whether such a similar work-around could be cobbled up for that, I
> > have no clue.
> >
> > Besides, the card I have does not have the 9805, but has the 9815,
> > presumably a newer chipset.
> >
> > I wonder it there could have been a fix for that applied in the newer
> 9815
> > chip?
>
>
>
> All the 98XX series parts share the problem. (the existance of the problem
> is
> documented in the MOSChip data sheet. Their suggestion is to not use EPP
> mode...)
>
> >
> > How would one go about checking that?, I assume with a loopback plugged
> in
> > it should be amenable to software checking.  One would have to cobble up
> a
> > parallel loopback, I may have enough of those parts on hand.
> >
> > Thanks Peter.
>
> A loopback for EPP needs at least an inverter for the handshaking...
>
>
> >
> > --
> > Cheers, Gene
> > "There are four boxes to be used in defense of liberty:
> > soap, ballot, jury, and ammo. Please use in that order."
> > -Ed Howdershelt (Author)
> > <http://www.captaincanadacrusades.ca/articles/none-dare-call-it-
> > conspiracy%5B1%5D.pdf>
> > Today, THREE WINOS from DETROIT sold me a framed photo of TAB HUNTER
> > before his MAKEOVER!
> > _______________________________________________
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
>
> Peter Wallace
> Mesa Electronics
>
> (\__/)
> (='.'=) This is Bunny. Copy and paste bunny into your
> (")_(") signature to help him gain world domination.
>
>
>
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