C)	Register 2 :    COMMAND STRINGS
		===============================

		Base Address + 04	VME write only access
		---------------------------------------------


	The command strings contains the serial protocol for the ABC chip
	commands.

	Eg :	Level 1 Trigger is the bit packet "110", and the first bit is
	====	the LSB ( bit 0 ) of the string register, therefore we want
		to load the value of 3

		"aaaaaa" is the 6-bit chip address

	TRIG	= 3 bits ( Field 1 )		( 110 = 0x0003 )
	SRST	= 7 bits ( Field 1 + 2 )	( 101 0100 = 0x0015 )
	BCRST	= 7 bits ( Field 1 + 2 )	( 101 0010 = 0x0025 )

	CAL1	= 15 bits ( Field 1 + 2 + 3 )	( 101 0111 0000 1100 = 0x1875 )
	CAL2	= 12 bits ( Field 4 + 5 )	( aaaaaa 110 000  = eg. 0x00c0 )

	SLOCOM	= 64 bits ( in 4 words of 16 bits ), each loaded sequentially
						by the LDSLOCOM 




	     |		'FAST' COMMAND STRINGS       |'SLOW' COMMAND | BURST |	
	     |  				     |	  STRING     | COUNT |
    ---------|-------|------|-------|-------|--------|---|---|---|---|-------|
	     | TRIG  | SRST | BCRST |  CAL1 | CAL2   | 1 | 2 | 3 | 4 |	     |
    ---------|-------|------|-------|-------|--------|---|---|---|---|-------|
     Bit 0   |	1    |	1   |	1   |	1   | a (MSB)|	 |   |	 |   | (LSB) |
	 1	1	0	0	0     a	
	 2	0	1	1	1     a	
	 3	-	0	0	0     a	
	 4	-	1	0	0     a	
	 5	-	0	1	1     a (LSB)
	 6	-	0	0	1     1	
	 7	-	-	-	0     1	
	 8	-	-	-	0     0	
	 9	-	-	-	0     0	
	10	-	-	-	0     0	
	11	-	-	-	1     0	
	12	-	-	-	1     -	
	13	-	-	-	0     -	
	14	-	-	-	0     -	
	15   |	-    |	-   |	-   |	-   | -	     |	 |   |   |   | (MSB) |
    ---------|-------|------|-------|-------|--------|---|---|---|---|-------|