Amiga 500 Processor Accelerator Project
by Leslie Ayling

Welcome once again to cheapskates corner where we try and buy the world for a song. This time around we shall increase the speed of the processor to just over 14Mhz double the standard speed for under  $25.

You will need the following:

1. an MC68000p12A 16MHz processor. These are available from Grapevine Group for $24.95 plus shipping.                      
2. a 74F74 D type flip flop. Try Bluff City here in Memphis BCD Mail order out  of Texas.
3. a few short lengths of hook up wire
4. a SPDT switch Refer to the accompanying circuit diagram Note: Keep the leads to the switch as SHORT as
possible, The circuit is relatively straight forward. the 74F74 is wired as a positive edge triggered divide by two circuit which provides the alternate clock frequency of 14 -18Mhz approximately. The old 68000 8Mhz processor is removed and replaced with the 16Mhz version which has is clock pin bent out horizontally so we can connect our new circuitry to it. The SPDT switch either connects the normal 7Mhz signal or the new 14Mhz signal to the 68000  clock input The switch can be changed while the machine is on however it will simply lock up Just reset as usual from the keyboard once you have changed speed.