Rumor has it that woodelf may have mentioned these
words:
 Gordon JC Pearce wrote:
 There's also Megasquirt, where you can buy the
hardware platform as a
kit, and download the circuit diagrams and firmware source code. 
Umm time to change the subject line ... Fuel injection has very little
with a scratch built computer.
PS. Looking at  a PROM burner the lowest cost one I could find is $750.
Where they that expensive (the programmers) back in the 70's when people
used them? 
$289 USD for the kit ($300 even shipped anywhere in the US):
http://www.arlabs.com/syscost.htm
It will do most stuff without adapters, but it *can* do 1702's if you buy
an adapter for it, which costs $59.00 
I got pretty excited, but $59 is for read only.  : (  The 1702 write module
is $695...
Grant