enableFB
	powers on fb, resets, enables DC/DC, initializes width/brightness/mux, clears LED flops, etc etc etc with our new validation scheme in place.

enableFBmin
	simply powers on fb and resets CPLD, without any checks.  use this if the cpld is hosed and needs to be reprogrammed (enableFB will fail its checks and will power the fb back off)

disableFB
	disables and powers down the fb

getFBfw
	return the fb firmware version

getFBhw
	return the fb hardware (board artwork) version

fbid type
	return the fb id

fb-cpld
	used to reprogram fb cpld, as in s" blah.xsvf" find if fb-cpld endif

127 setFBbrightness
	set the fb brightness level (127 here)

64 setFBwidth
	set the fb pulse width (64 here)

$fff setFBenables
	set the binary FB enable mask (all 12 LEDs enabled here).  The "$" specifies hex, but if you are good at translating binary masks to decimal, you don't need this.  bit[0] is LED1, bit[1] is LED2, etc...

2 setFBmux
	mux which LED current is sent back to the mainboard (LED2 here).  An argument of 0 disables the mux, while 13 selects the TTL driver pulse.

610 setFBrate
	set the rate (in Hz) for the flasherboard pulses. Rates supported are 610, 305, 153, 76, 38, 19, 10, 5, 2, and 1 Hz.

startFBflashing
	starts the flasher board flashing

stopFBflashing
	stops the flasher board flashing

(1 setFBdcdc, getFBdcdc)
	independent control of the DC/DC enable bit, for debug.  leaving in for now.