On Tue, 9 Dec 2008, Jon Elson wrote:
> Date: Tue, 09 Dec 2008 22:28:20 -0600
> From: Jon Elson <[EMAIL PROTECTED]>
> Reply-To: "Enhanced Machine Controller (EMC)"
> <emc-users@lists.sourceforge.net>
> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
> Subject: Re: [Emc-users] Write error with hostmot2 and 7i43 board
>>
>> NetMos cards that do _not_ work. They dont sample read data on the correct
>> strobe edge so would be almost impossible to make work with HostMot2 (that
>> has
>> read-side effects). They may be fine for bit I/O but they suck for EPP. They
>> also have open drain control output signals, yick yack yuck!
>>
> Oh, good to know you are having the same problem with them. I couldn't
> even figure out the port address and get it to wiggle the output pins,
> but thought it might have been a bad unit.
>
> Jon
I wasted 2 days fscking around with those cards (NetMos = MOSChip 9805 based)
I had no trouble getting them into EPP mode, they just dont work right in EPP
mode. I got write to work but they seem to sample the read data on the leading
edge of the strobe, this is contrary to the EPP specs I've read and every
other EPP capable parallel port I have tested. For some more advanced features
of HostMot2 to work properly, reads must be qualified by a strobe as some read
have side effects (reading FIFOs for example). There is no reliable way to
make this work with the MOSChip parts. I hate to admit defeat as these are by
far the most common PCI parallel port chips but I give up on MosChip cards.
Peter Wallace
Mesa Electronics
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