DOH, those of you on the vector list will have already seen this.  Sent it to the wrong list.
 
For those of you not on vectorlist:
 
 
 
While building up the two beta 9100 keyboard wedge boards I realized I didn't have any 22pf caps.  So I tossed a pair of 100pf caps onto my breadboard of the circuit and everything worked great.
 
Then I went to build the perfboard version and realized I only had two of the 100pf caps and as I wanted to leave the breadboard version intact for now so I grabbed a pair of .1uf caps.
 
Hooked everything up and it didn't work.
 
So I checked everything twice more and still no go.  Got to wondering if maybe the value of those caps is really important and realized I have NO idea how to spec them nor even what they do.
 
So can anyone enlighten me?
 
I have seen circuits use 18pf, 22pf and 27pf for the crystal caps.  The 100pfs do work, but I wonder now if I just got lucky.
 
Also which should I use, simple ceramic disc or the Monolithic ceramic disc?
 
David