
Version 3 hardware, which maps to PCB revision 26, first implemented on the
JK ruby.

The firing sequence is:

Charge starts (by the user)
main CPU issues "en" command Accopian is enabled
Crowbar is enabled   (so HV is present, and being disipated in resistor)

Charge completes...
Fire is pressed

Pulse from the main box received
 (Lamps being fired by main box)
Crowbar is disabled.  HV is applied to Qswitch

Lamp pulses observed

Qswitch pulse is scheduled

last event...
Crowbar enabled
main CPU issues "dis" command, Accopian disabled


The Accopian takes a second or two to stablize.
The Crowbar takes milliseconds to communtate.

