
So far, 20 meg. seems to be the limit. I've had it working at 25 meg. but it was a little flakey. I'm trying -D2 PALS and the inevitable U9 tricks. I'll post it if I'm successful.
We have found that 12 meg. parts work just fine at 20 meg. The reason for this, I think, is that when used in an AMIGA, none of the more exotic 020 modes are used.  I designed the board for operation at 16 meg. and you should use 16 meg parts, but if you want a cheapest possible way to get a LUCAS board going try 12 meg. parts, with a 12 meg. xtal. If it works you can try xtals all the way up to 20 meg. I can't tell you definately it will work but no one so far with 12 meg. parts has found any problem operating at 20. "Ya play de game, Ya takes yer chances"


