ASEM-51 V1.2                                         Copyright (c) 1996 by W.W. Heinz                                         PAGE 1





       MCS-51 Family Cross Assembler   A S E M - 5 1   V 1.2
       =====================================================



	Source File:	PWM.ASM
	Object File:	PWM.HEX
	List File:	PWM.LST



 Line  I  Addr  Code            Source

    1:		N      0000		ORG	0
    2:	  0000	75 90 FF	LOOP:	MOV	P1,#0FFH
    3:	  0003	E5 90			MOV	A,P1
    4:	  0005	70 04			JNZ	LOOP1
    5:	  0007	C2 B0			CLR	P3.0
    6:	  0009	80 F5			SJMP	LOOP
    7:	  000B	B4 FF 04	LOOP1:	CJNE	A,#0FFH,LOOP2
    8:	  000E	D2 B0			SETB	P3.0
    9:	  0010	80 EE			SJMP	LOOP
   10:	  0012	F8		LOOP2:	MOV	R0,A
   11:	  0013	74 FF			MOV	A,#0FFH
   12:	  0015	C3			CLR	C
   13:	  0016	98			SUBB	A,R0
   14:	  0017	F9			MOV	R1,A
   15:	  0018	D2 B0			SETB	P3.0
   16:	  001A	12 00 28	LOOP3:	LCALL	DELAY
   17:	  001D	D8 FB			DJNZ	R0,LOOP3
   18:	  001F	C2 B0			CLR	P3.0
   19:	  0021	12 00 28	LOOP4:	LCALL	DELAY
   20:	  0024	D9 FB			DJNZ	R1,LOOP4
   21:	  0026	80 D8			SJMP	LOOP
   22:	  0028	7F 11		DELAY:	MOV	R7,#17
   23:	  002A	DF FE			DJNZ	R7,$
   24:	  002C	22			RET
   25:					END





                     register banks used:  ---

                     no errors




ASEM-51 V1.2                                         Copyright (c) 1996 by W.W. Heinz                                         PAGE 2





	       L I S T   O F   S Y M B O L S
	       =============================


SYMBOL				  TYPE     VALUE	LINE
------------------------------------------------------------
AC				  BIT	      D6
ACC				  DATA	      E0
B				  DATA	      F0
CY				  BIT	      D7
DELAY				  CODE	    0028	  22
DPH				  DATA	      83
DPL				  DATA	      82
EA				  BIT	      AF
ES				  BIT	      AC
ET0				  BIT	      A9
ET1				  BIT	      AB
EX0				  BIT	      A8
EX1				  BIT	      AA
EXTI0				  CODE	    0003
EXTI1				  CODE	    0013
F0				  BIT	      D5
IE				  DATA	      A8
IE0				  BIT	      89
IE1				  BIT	      8B
INT0				  BIT	      B2
INT1				  BIT	      B3
IP				  DATA	      B8
IT0				  BIT	      88
IT1				  BIT	      8A
LOOP				  CODE	    0000	   2
LOOP1				  CODE	    000B	   7
LOOP2				  CODE	    0012	  10
LOOP3				  CODE	    001A	  16
LOOP4				  CODE	    0021	  19
OV				  BIT	      D2
P				  BIT	      D0
P0				  DATA	      80
P1				  DATA	      90
P2				  DATA	      A0
P3				  DATA	      B0
PCON				  DATA	      87
PS				  BIT	      BC
PSW				  DATA	      D0
PT0				  BIT	      B9
PT1				  BIT	      BB
PX0				  BIT	      B8
PX1				  BIT	      BA
RB8				  BIT	      9A
RD				  BIT	      B7
REN				  BIT	      9C
RESET				  CODE	    0000
RI				  BIT	      98
RS0				  BIT	      D3
RS1				  BIT	      D4
RXD				  BIT	      B0

ASEM-51 V1.2                                         Copyright (c) 1996 by W.W. Heinz                                         PAGE 3



SYMBOL				  TYPE     VALUE	LINE
------------------------------------------------------------
SBUF				  DATA	      99
SCON				  DATA	      98
SINT				  CODE	    0023
SM0				  BIT	      9F
SM1				  BIT	      9E
SM2				  BIT	      9D
SP				  DATA	      81
T0				  BIT	      B4
T1				  BIT	      B5
TB8				  BIT	      9B
TCON				  DATA	      88
TF0				  BIT	      8D
TF1				  BIT	      8F
TH0				  DATA	      8C
TH1				  DATA	      8D
TI				  BIT	      99
TIMER0				  CODE	    000B
TIMER1				  CODE	    001B
TL0				  DATA	      8A
TL1				  DATA	      8B
TMOD				  DATA	      89
TR0				  BIT	      8C
TR1				  BIT	      8E
TXD				  BIT	      B1
WR				  BIT	      B6