Generates 32-bit address (DISP32), performs a MULA operation 
	with it and the content of register Rs5 (bank selected by BS5).
	The result is loaded into AGU accumulator register. 
Note: 
	DISP32  must be always expressed as a pair "SYMBOL IMMEDIATE". 
	More information on this in notations.
      
      
	  
 Takes 4 cycles to execute.
	  
	      Example: AGU_RXD ZERO 0xA 0xA5
	  
      
	  
	  DISP     AGU P5
	-----------------
	00000000    -  A5
	00000000    -  00
	0000000a   RXD 00
	00000000    -  00
	  
NOT YET
AGU_RXD ZERO 10 0x20 
  !! Performs MULA with 32-bit 
  !! displacement 10 and the
  !! content of register 0x20
  !! and load the result to 
  !! AGU accumulator register.