phase stepping

[John Sheahan <jrsheahan-at-optushome.com.au>]

Hi
I'm a hardware designer trying to build a router table.

I've set up redhat 6.2, rtlinux 2.2a, and the January emc 
sourceforge distribution. 

I have the simulations running ok, now added  several 
steppers running  phase stepping using freqmod.o  
(phase step both matches my stepper driver, and seems
 more noiseproof and sensible).

I'm having trouble in two areas:

when jogging with the arrow keys, hitting the key several times close
together generates a "following error" and reverts to ESTOP reset.
Can someone explain (or point to documenation) to help me understand 
which ini file veriables are relevant to this mode, and what they do?
There are kind of a lot, most seem to be servomotor related.

secondly, I'm using the minimillio as EMCIO.  Is this wise? I have no 
parallel port hardware at 0x278. 
(but this could change - as a PS1 video game controller handpiece looks 
 an interesting option here..) 

regards, john