H = -1                    
	 H = H << 8              
	 H = H >> 1              
	 H = H >> 1              
	 H = H >> 1              
	 H = H
	 MAR = SP; rd 
 	 MAR = SP = SP - 1; rd
 	 OPC = H AND MDR       
ISHR10   Z = OPC; if (Z) goto ISHR14; else goto ISHR11 
ISHR11   H = MDR 
	 MDR = H + MDR 
	 OPC = OPC - 1; goto ISHR10 
ISHR14   TOS = MDR; wr; goto Main1 
Main1    GOTO (MBR)