68030 STATE MACHINE MOD FOR A3640

What is it?
It's a freeware firmware upgrade by SpeedGeek for A3640 owners seeking a
performance boost. The new state machine logic eliminates 2 extra wait states
from every A3640 bus cycle so your 68040 can access the A3000/A4000
motherboard resources at full speed. This logic has been tested at clock
speeds from 25-50 MHz*. It works with either a 1x or a 1/2x clocked
motherboard (other mods are required for a 1/2x clocked motherboard). 

How much faster will my A3640 be?
It's hard to quantify but you can expect Fast memory and ROM speeds to
improve by 2-3 MB/sec. Chip memory, Zorro Bus and Custom chips will
probably have < 1 MB/sec increase. Your mileage will vary with clock
speed, ROM and RAMSEY speed settings, etc.

Disclaimer: Use at your own risk. No warranty expressed or implied, etc. 

Requirements:
C= A3640
Universal programmer or GAL programmer
SMD rework equipment
(3) GAL/PLD22V10-10
(2) GAL/PLD16V8-7

Optional:
(3) PLCC28 sockets
(2) PLCC20 sockets

How to:
Just program the new chips with the .jed files in this archive. Then install the
new chips. *The new U207 and U208 were tested by apollo630
since they were created to avoid cut and jumper mods on the originals. If you
don't want to use them then cut the trace on U207 pin 9 and solder jumper it
to pin 10. Also, cut the trace on pin 3 U208 and jumper it to GND or a pull up
resistor if you have the inverted version (from the old EAB archive).

Tech support and bug reports:
PM me on Amibay, EAB, Amiga.org or send me an email.

Enjoy!

Revision History:
2-3-2012 U208R1 SIG_LE Latch holding disabled ("Inverted" SIG_LE removed)  
6-13-2013 U203R3 Fix possible bug with latch holding on dynamic bus size
cycles
7-27-2013 U205R2 has a new feature /WAIT on pin 17 for A4000T owners. This
pin is N/C and in a logical high state (due to the GALs internal pull-up
resistor). If you jumper it to GND it will add 1 wait state at cycle start.