Philip Pemberton wrote:
  I am having fun
with the 84 plcc chips I am using -- the free PCB
program has no
84 pin plcc socket footprints so I hope I get the homebrew footprint right.
 
Yikes.. What PCB software are you using?
 
 The only free PCB program for windows I could find.
http://www.freepcb.com/    Free PCB.
( Now if somebody had a  copy  of  good  low  cost  -  $99  US  pcb  program
and $99 schematic  entry  program  I  would be happy.)  The CPLD develpment
kit was $99.
Verilog isn't too hard if you already know C. VHDL is Pure Evil (tm)...
 
I like schematics with real GATE symbols best.
Most of my design is still rough notes on quad paper often at 3am. This
year I may have Instruction
set that I am happy with. A)  Front panel and 1975 ish architecture. B)
A clean design if posible.
So far a 6800 stretched to 18 bits has the most chance of  being built
once I get the CPLD's
hardware compiled, and a PCB layed out. Pin  locking the problem I have
trying to stuff more
features into the 128 cell CPLD's I am using.
Ben Alias Woodelf