======000README --- README file for MAGIC ===========================
        0) copy the magic.tar to your directory and then
                tar -xf magic.tar
           and then cd :magic
  	1) To generate the "magic", simply type
  		make
  	2) To clear the obj files and the target file(magic), type
  		make clobber
  	2b)To clear the obj files Only 
  		make clean
  	3) To make an listing of all files, type
  		make print
  	1-2-3) To see what will happen if you type "make ...", type
  		make -n 
  		make -n clean
  		make -n print
   Wen-Nung Tsai, 1993/03/11
  ====================================================================
   ============  (MAGIC --- MAchine of Graham In China)  ============
  === The CPU has one ACcumulator, one indeX register, and a 12-bit IP
  ===  It also has a FLAG register of 2-bit: 00=LT, 01=EQ, 10=GT
  (For more detail, see Intr. to Computer Science,3rd ed,Chap 4, by Graham)
  ==	Instruction set is modified by Wen-Nung Tsai, NCTU. Mar-1993
  ==-Instructions available:
     0  NOP 		--- No OPeration
     1	LDA  addr	--- Load Data in addr into Ac
     2	STA  addr	--- STore Accumulator into addr
     3	ADD  addr	--- ADD content in addr into AC
     4	SUB  addr	--- AC= AC - [addr]
     5	MUL  addr	--- AC= AC * [addr]
     6  DIV  addr	--- AC= int(AC / [addr])
     7	MOD  addr	--- divide yielding remainder
     8	CMP  addr	--- compare AC with [addr]
     9	JMP  addr	--- unconditional JuMP
     A	JLT  addr	--- Jump if Less Than
     B	JEQ  addr	--- Jump if EQual to
     C	JGT  addr	--- Jump if Greater Than
     D	IN   addr	--- INput decimal value into addr
     E	OUT  addr	--- OUTput value at addr in decimal
     F	other instructions determined by next nibble:
      (in this case, the addr can not > 255 if any)
     F0	CLA		--- CLear Accumulator	(AC=0)
     F1	INS addr	--- input string into addr till a "$" 
     F2	OUTS addr	--- output string at addr till a "$" 
     F3	INC addr	--- mem(addr)++
     F4	DEC addr	--- mem(addr)--
     F5	INCA		--- AC=AC+1
     F6	DECA		--- AC=AC-1
     F7	MA2X		--- X=AC	(also known as TAX)
     F8	MX2A		--- AC=X	(also known as TXA)
     F9	LDAI const	--- AC=const
     Fa	LDAX offset	--- AC=mem(X+offset) 
     Fb	STAX offset	--- mem(X+offset)=AC
     Fc	INCX		--- X=X+1
     Fd	DECX		--- X=X-1
     Fe	CLX		--- X=0
     FF	HALT		--- terminate execution
  ============ Directives for this Assembler:
     ORG n	--- set starting address for next line
     DW  n	--- Define Word: reserve n words
     DC  n	--- Define Constant n in this word
     DB  "string" --- Define Byte in STRING format
     END [start_addr] --- END of the program
        (set IP=start_addr if start_addr is present, default is 0)
  ========================================================================
   Type "help" for help at the prompt "command?" if necessary when Running magic