🚀 go-pugleaf

I am having major problems trying to program a GAL chip.  I'm using a 
ShareWare software/hardware package to get the job done. There is no 
doubt in my mind that the system does work, but it still won't program 
the GAL.  I built my own programmer, and wrote software for it.  From 
that I can tell, on the scope & all, the signals going to the GAL are 
100% correct, but it STILL won't program.
(When I read the chip back, all the bits are cleared)
I have blown three GAL chips so far.. the last one came a a shock.. I 
placed it in the circuit, issued the command to program it, and for the 
first row, the EDIT voltage was a steady 16.5v .. then came the /STR 
pulse. At that point, the EDIT voltage went down to 2.67v, and stayed 
there.. it has never come back to 16.5v  (my three 'blown?' GALs all 
exibit this problem.  The 10ms /STR pulse comes from a '221, so it thats 
pretty stable.  I'm at my wits end.   I have planned to use GALs in my 
next few projects, and this is problem is getting to me (and my pocket 
book).
I'm using part number  PALCE16V8H-25  from AMD.  I could find NOTHING on 
these chips at my local store.. nothing (I read that AMD sends the 
programming info ONLY to registered manufactures of PLD programmers)
ANY speck of help would be a ray of light in my bleak tunnel.
 
(Quick info: my programmer shuts off Vcc and EDIT before a chip is placed 
in the socket. I cannot see anything wrong with my hardware or software)
-John

;--- (John Kamchen) a user of sys6626, running waffle 1.64
;E-mail: flux@sys6626.bison.mb.ca
;system 6626: 63 point west drive, winnipeg manitoba canada R3T 5G8