Start	0x75F40
End	0x75F53
Length 20 bytes

Sequence number 	(8 bits)
Raster ID		(16 bits)
Control flags		(8 bits)
Y start address		(32 bits)
Y height address	(32 bits)
X0			(12 bits)
Y0			(12 bits)
Filler			(8 bits)
Theta			(16 bits)
XRT OCB			(4 bits)
XRT P size		(8 bits)
FS enable		(1 bit)
EIS FOV flag		(2 bits) [must be set to 1]
