Beam Crossing History Shift Register Programming
            ------------------------------------------------

                                                   Original:  6-MAY-1998
                                                     Latest:  6-MAY-1998

As shown in the L1 Framework System Level Timing diagram, if the data
is presented to the TRM in Tick 1, the Capture Data signal arrives
during Tick 6.  This means that the data is captured at the end of
Tick 6/ the beginning of Tick 7.  The following table then describes
which Ticks will be read out from the various different FPGAs as a
function of the Beam Crossing History Shift Register programming.

First Half of the Framework
---------------------------

	 	   BXHSR Stage 1
	 FPGA	      Delay		Ticks Read Out
	 ----	   -------------	--------------
	
	Miguel		0		TT+4, TT+3, TT+2, TT+1
			1		TT+3, TT+2, TT+1, Triggered Tick
			2		TT+2, TT+1, Triggered Tick, TT-1
			3		TT+1, Triggered Tick, TT-1, TT-2
			4		Triggered Tick, TT-1, TT-2, TT-3

	AONM/FOM	0               TT+1, TT+2, TT+3           
			1                Triggered Tick, TT+1, TT+2
			2               TT-1, Triggered Tick, TT+1
			3               TT-2, TT-1, Triggered Tick
			4               TT-3, TT-2, TT-1

	PBS		0               TT+2          
			1               TT+1          
			2               Triggered Tick
			3               TT-1
			4               TT-2

	GS		0               TT+2          
			1               TT+1          
			2               Triggered Tick
			3               TT-1
			4               TT-2

	TDM		0               TT+1, TT+2, TT+3           		
			1                Triggered Tick, TT+1, TT+2
			2               TT-1, Triggered Tick, TT+1
			3               TT-2, TT-1, Triggered Tick
			4               TT-3, TT-2, TT-1

Second Half of the Framework
---------------------------

	 	   BXHSR Stage 1
	 FPGA	      Delay		Ticks Read Out
	 ----	   -------------	--------------
	
	Miguel		0		TT+3, TT+3, TT+1, Triggered Tick
			1		TT+2, TT+1, Triggered Tick, TT-1
			2		TT+1, Triggered Tick, TT-1, TT-2
			3		Triggered Tick, TT-1, TT-2, TT-3
			4		TT-1, TT-2, TT-3, TT-4

	AONM/FOM	0               Triggered Tick, TT+1, TT+2           
			1                TT-1, Triggered Tick, TT+1
			2               TT-2, TT-1, Triggered Tick
			3               TT-3, TT-2, TT-1
			4               TT-4, TT-3, TT-2

	PBS		0               TT+1          
			1               Triggered Tick          
			2               TT-1
			3               TT-2
			4               TT-3

	GS		0               TT+1          
			1               Triggered Tick          
			2               TT-1
			3               TT-2
			4               TT-3

	TDM		0               Triggered Tick, TT+1, TT+2
			1                TT-1, Triggered Tick, TT+1
			2               TT-2, TT-1, Triggered Tick
			3               TT-3, TT-2, TT-1
			4               TT-4, TT-3, TT-2