On Tuesday 14 August 2007, Chris Radek wrote:
>On Tue, Aug 14, 2007 at 04:03:26PM +0200, Tamas Konya wrote:
>> Hi all,
>>
>> What is the maximum number of parport in the system? I know the
>> theoretical number of EMC parport driver is 8, but don't know what is it
>> mean in general...
>
>Only limited by the number of PCI slots you have, I bet.
And even that can be gotten around if ever someone writes a driver for that
futurelec board with 3 complete cmos 8255's on it, giving 72 I/O pins on 3,
34 pin headers. That would give 3 each parports per pci slot if one were
willing to make up the 34 pin to parport adapters. However, that would
cripple about half the ability of each of those ports if limited to emulating
a parport.
It also looks as if its been re-designed now, and raised to $79.90 AUD (watch
the exchange rate, the site lies when it claims those are USD prices, I got
bit about $40 on 3 of the older versions a couple of years ago), and because
of the power tapping gingerbread now occupying a portion of the back panel
slot, and the new orientation of the 34 pin headers, is going to require an
additional slot be left open to get the cables out to our world. A bad
redesign IMNSHO.
I was able to make some simple stepper drivers run motors with one of them,
but it was a user-space driver, severely hampered in its smoothness by the
normal linux IRQ activity, and I came to the conclusion I would be 6 months
quicker to a working emc if I just bought one of Jeffs 3 axis kits. So I
did.
However, this board, or a clone of it, sure has the appeal for a resource
limited interface as it's capable to running a full 6 axis plus all the tool
changers, coolant, spindle etc gizmo's one could hang on one mill, with just
one card and the right driver.
--
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)
Most places distinguish them merely by using the appropriate value.
Hooray for context...
-- Larry Wall in <[EMAIL PROTECTED]>
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