Altera programming problem

In laboratory I have few boards with Altera Flex600. Boards are connected
with PC using ByteBlaster. On PC I have Win98 OS. On the all PC is the
same software.
Problem is that on some computers after configuring ALTERA device after
some time (sometimes very short) project in Altera is deleteted.
How to solve that problems without disconnecting ByteBlaster after
programming?

				Jaroslaw Guzinski

Jaroslaw Guzinski <jarguz@sunrise.pg.gda.pl> wrote in message news:<Pine.GSO.4.58.0310210953060.27819@sunrise.pg.gda.pl>...
> In laboratory I have few boards with Altera Flex600. Boards are connected
> with PC using ByteBlaster. On PC I have Win98 OS. On the all PC is the
> same software.
> Problem is that on some computers after configuring ALTERA device after
> some time (sometimes very short) project in Altera is deleteted.
> How to solve that problems without disconnecting ByteBlaster after
> programming?
> 
> 				
We had a similar problem some time ago. We suspected the PC pokes the
printer port every so often (something to do with polling
peripherals??), causing the nStatus line to reset.

We much reduced the problem by removing the LPT1 entry in the PCs
device list, so that the PC doesn't know there is a printer port. YOu
could also try adding a toggle switch on the nStatus line betweeh the
ByteBlaster and the target.

Jaroslaw Guzinski wrote:
> In laboratory I have few boards with Altera Flex600. Boards are connected
> with PC using ByteBlaster. On PC I have Win98 OS. On the all PC is the
> same software.
> Problem is that on some computers after configuring ALTERA device after
> some time (sometimes very short) project in Altera is deleteted.

I assume this means the downloaded image is corrupted.

> How to solve that problems without disconnecting ByteBlaster after
> programming?

Sounds like a intermittent connection on the ByteBlaster or PC connector.

        -- Mike Treseler

On Tue, 21 Oct 2003, ted wrote:

> Jaroslaw Guzinski <jarguz@sunrise.pg.gda.pl> wrote in message news:<Pine.GSO.4.58.0310210953060.27819@sunrise.pg.gda.pl>...
> > In laboratory I have few boards with Altera Flex600. Boards are connected
> > with PC using ByteBlaster. On PC I have Win98 OS. On the all PC is the
> > same software.
> > Problem is that on some computers after configuring ALTERA device after
> > some time (sometimes very short) project in Altera is deleteted.
> > How to solve that problems without disconnecting ByteBlaster after
> > programming?
> >
> >
> We had a similar problem some time ago. We suspected the PC pokes the
> printer port every so often (something to do with polling
> peripherals??), causing the nStatus line to reset.
>
> We much reduced the problem by removing the LPT1 entry in the PCs
> device list, so that the PC doesn't know there is a printer port. YOu
> could also try adding a toggle switch on the nStatus line betweeh the
> ByteBlaster and the target.
>

Thanks, I will try to remove LPT port from device list.
In our Byte Blaster I have that switch but it is a little "unelegant"
solution.

Jaroslaw Guzinski

On Tue, 21 Oct 2003, ted wrote:

> Jaroslaw Guzinski <jarguz@sunrise.pg.gda.pl> wrote in message news:<Pine.GSO.4.58.0310210953060.27819@sunrise.pg.gda.pl>...
> > In laboratory I have few boards with Altera Flex600. Boards are connected
> > with PC using ByteBlaster. On PC I have Win98 OS. On the all PC is the
> > same software.
> > Problem is that on some computers after configuring ALTERA device after
> > some time (sometimes very short) project in Altera is deleteted.
> > How to solve that problems without disconnecting ByteBlaster after
> > programming?
> >
> >
> We had a similar problem some time ago. We suspected the PC pokes the
> printer port every so often (something to do with polling
> peripherals??), causing the nStatus line to reset.
>
> We much reduced the problem by removing the LPT1 entry in the PCs
> device list, so that the PC doesn't know there is a printer port. YOu
> could also try adding a toggle switch on the nStatus line betweeh the
> ByteBlaster and the target.
>

I have removed th LPT port from device list but then I can not programing
in Max+PlusII. PC doesnt see LPT port but Max+PlusII also doesnt se it.

Jaroslaw Guzinski