I decided the Maximate is too slow to do both the EFI and the EFIS job
so I intend to use two Maximites and one aux card for the sensors
and injector transistors. The two Max's can share sensor data.

The EFI is time critical so that is demanding
of program execution time. The EFIS Maximite has all the time
in the world as all it has to do is up date the VGA display every half
second.


Here is the BASIC source code for a simple EFIS program that update
the VGA  every half second. This is just a clock but I hope you get the idea.

Mode 1 ' sets the screen rez

SetTick 500, doit 'set the interrupt to every half second AKA 500 msec

twiddle: ' The EFIS work would be done in here.
Print " "; 'the half second hardware interrupt  occurs in here
GoTo twiddle

doit: 'upon half second hardware interrupt
CLS                   'clear the VGA screen
Locate 30, 30 'Put the clock at column 30 row 30 on the VGA
Print Time$   'Print the battery backed up real time clock on the VGA
IReturn  'interrupt routine done. go back to twiddle


Pretty simple.

The easiest hard ware package to build  is just a 4 inch length of six by six aluminium extrusion
with 3/16 wall that can be drilled and taped for end covers.

Over kill on volume but lots of room for expansion.

Paul Lamar

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