INT 6F - HP Vectra EX-BIOS - "F_DEF_MASKS" - DEFINE GRAPHICS CURSOR MASKS
	AH = 0Ah
	BP = 005Ah (driver ID for V_STRACK)
	BH = width of save area in bytes
	BL = hot-spot X coordinate
	CH = height in scan lines
	CL = hot-spot Y coordinate
	ES:SI -> sprite mask (screen mask followed by XOR sprite mask)
Return: AH = status (see #03744)
	BP,DS destroyed
Note:	the save area is one byte wider than the actual sprite mask; the total
	  size of the sprite is at most 144 bytes
SeeAlso: AH=00h"HP Vectra",AH=04h"F_TRACK_INIT",AH=08h"F_TRACK_OFF"
SeeAlso: AH=0Ch"F_SET_LIMITS_X",AH=10h"F_PUT_SPRITE",AH=12h"F_REMOVE_SPRITE"