Software Counter/Oscillascope

[Plutonique9]

Hey there,
I've been working 4 a couple of weeks now on a non funtioning 606, 
all the sound generators are fine, yet it refuses to write anything 
to memory (playing previously stored patterns and tracks work 
though).
I've been over the circuit board dozens of times checking 4 broken 
traces and the such, tested 100's of parts, but with no avail.
The last thing that i feel sus about in this unit is maybe the CPU 
clock and/or "INT Clock" (is this interupt clock?) is mis aligned.
The "Int clock" adjustment is made via trimmer TM1 while the CPU is 
one of those tuning coil "thingie majigs".
I asked this question on AH with no responce about what the symtoms 
of an mis alligned CPU clock and INT clock would be in an XOX 
machine???, hopefully it may be the cause of my troubles. But still 
this might not be the case as it has no problems playing back 
previously stored patterns and tracks, just anything involving 
writing to memory.
In any case, I feel that these must be re calibrated (i've tweaked 
them both probably out of allignment). The serice manual states that 
the INT clock should be tuned to 1.8ms while the CPU clock rate 
should be set at 2.2us. I have no Oscillascope to test these 
calibrations and i was hoping that i could use my PC to help me with 
these tests. Can any one recomend software oscillacopes which can cut 
this? What would these times be in "hertz"? I could probably tune the 
INT clock with a refernce oscillator at the specified freq., but 
somehow i feel that the cpu clock would be out of the audio range, i 
guess the limitation of digital sampling frequency could hinder this 
impossible, or maybe not, I've really just got to here it from 
someone who's down with the facts :)

Thanks for your help and time

-- Plutonique9, Plutonique9 at symbiocom.com on 9/01/2001