PCIe Parallel cards - what chipset?

16 Apr 2018 14:18 #109123 by cupakm
cupakm created the topic: PCIe Parallel cards - what chipset?
Hi all,

I'm an absolute beginner to LinuxCNC (please excuse the post if in wrong subforum), but it looks very promising, so I was asked by a friend if I could help him setup a simple 3-axis CNC machine.
The first thing I wonder about and can't seem to be able to find is what chipset should the PCIe expansion card be equipped with - my MoBo unfortunately doesn't offer any Parallel port.

Many thanks for any answer in advance.

Best wishes!
16 Apr 2018 15:34 #109128 by jmelson
jmelson replied the topic: PCIe Parallel cards - what chipset?
To handle software-generated step/direction signals, ANY parport that has standard register assignment will do.
I do know of ONE totally crazy unit that seems to be nonstandard, that is the WCH382L.
Otherwise, Netmos and Oxford chips work fine.

If you need a PCIe card for a hardware interface that uses the parport in EPP mode, that gets a little more complicated, but the later NetMos chips (9900, 9901) and the Oxford chips on Siig cards work well.

17 Apr 2018 20:45 - 17 Apr 2018 20:47 #109222 by cupakm
cupakm replied the topic: PCIe Parallel cards - what chipset?
Thanks for your suggestions! I've found one available at some local dealer - it says Moschip MCS9901 (most probably that one you've mentioned...?) and lists 1x parport (DB25), 2x serial port (RS232 type DB9) and EPP also, among others.

Indeed, that WCH CH382L thing can be found on eBay, pretty cheap. Also some unspecified chipsets.
It is mentioned here wiki.linuxcnc.org/cgi-bin/wiki.pl?WCH but strangely, linked from the "supported hardware" page here wiki.linuxcnc.org/cgi-bin/wiki.pl?LinuxCNC_Supported_Hardware
Last Edit: 17 Apr 2018 20:47 by cupakm.
18 Apr 2018 02:14 #109228 by jmelson
jmelson replied the topic: PCIe Parallel cards - what chipset?
Yes, the MCS9901 has worked not just for software stepping but also for EPP-connected motion controllers like the ones I make.

I'm less sure about the WCH unit, I wasn't able to get it to work in EPP mode, at the least.

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