Dr. Mahalingam College of Engineering and
Technology
Pollachi – 642003
Department of Electronics and Communication Engineering
EC1307 - MICROPROCESSOR & ITS APPLICATIONS LAB
LAB MANUAL
ACTIVITY NAME OF FACULTY DESIGNATION SIGNATURE
PREPARED
BYMs. P. SENTHIL AMIRTHAM LECTURER
APPROVED
BY
PROF.K.R.RADHA
KRISHNANHOD/ECE
ISSUED BYPROF.P.CHANDRASEKAR
MR/ISO
1
MCET/BEC/LM/
SUBJECT : EC1307 MICROPROCESSOR & ITS
APPLICATIONS LABORATORY
SEMESTER : V
BRANCH : ECE
INDEX
S.No. LIST OF EXPERIMENT PAGE NO
1 Programs for 8/16 bit arithmetic operations(Using 8085)
2 Programs for sorting & searching (Using 8085,8086)
3 Programs for String manipulation operations (Using 8086)
4 Programs for Digital clock & stop watch (Using 8086)
5 Interfacing ADC & DAC
6Parallel communication between two kits using Mode1 and
Mode 2 of 8255
7 Interfacing and programming of 8259,8279
8 Serial communication between two MP kits using 8251,8253
9 Interfacing & programming of stepper motor and DC motor
control10 Programming using Arithmetic, Logical and bit manipulation
instructions of 8051 microcontroller
11Programming & verifying Timer, Interrupts and UART
operations in 8031/51 microcontroller
12 Communication between 8051 microcontroller kit & PC
2
EX.NO.1 PROGRAMS FOR 8/16 BIT ARITHMETIC OPERATIONS(8085)
i) 8 – Bit Addition:
MVI D,00
LDA add1
MOV B,A
LDA add2
ADD B
JNC Loop1
INR D
Loop1: STA add3
MOV A,D
STA add4
HLT
Result:
Add1 : data1
Add2 : data2
Add3 : Result
Add4 : Carry
ii) 16-bit Addition:
MVI B,00
LHLD add1
XCHG
LHLD add3
DAD D
JNC Loop1
INR B
Loop1: SHLD add5
XCHG
SHLD add7
HLT
3
Result :
Add1 : Lower order byte of data 1
Add2 : Higher order byte of data 1
Add3 : Lower order byte of data 2
Add4 : Higher order byte of data 2
Add5 : Lower order byte of Result
Add6 : Higher order byte of Result
Add7 : Carry
iii) 8 –bit Subtraction:
MVI D,00
LDA add1
MOV B,A
LDA add2
SUB B
JNC Loop1
INR D
CMA
INR A
Loop1: STA add3
MOV A,D
STA add4
HLT
Result:
Add1 : data1
Add2 : data2
Add3 : Result
Add4 : Borrow
4
iv) 16-bit Subtraction:
MVI B,00
LHLD add1
XCHG
LHLD add3
MOV A,E
SUB L
STA add5
MOV A,D
SBB H
JNC Loop1
INR B
Loop1: STA add6
MOV A,B
STA add7
HLT
Result:
Add1 : Lower order byte of data 1
Add2 : Higher order byte of data 1
Add3 : Lower order byte of data 2
Add4 : Higher order byte of data 2
Add5 : Lower order byte of Result
Add6 : Higher order byte of Result
Add7 : Borrow
5
v) 8 – bit multiplication:
MVI D,00
LDA add1
MOV B,A
LDA add2
MOV C,A
MVI A,00
Loop2:ADD B
JNC Loop1
INR D
Loop1: DCR C
JNZ Loop2
STA add3
MOV A,D
STA add4
HLT
RESULT:
Add1 : data1
Add2 : data2
Add3 : Lower order byte of Result
Add4 : Higher order byte of Result
vi) 16-bit Multiplication :
LXI B,0000
LHLD add1
XCHG
LHLD add2
SPHL
LXI H,0000
Loop2: DAD SP
JNC Loop1
INX B
6
Loop1: DCX D
MOV A,E
ORA D
JNZ Loop2
SHLD add5
MOV L,C
MOV H,B
SHLD add7
HLT
Result :
Add1 : data 1 Lower order byte of data 1
Add2 : data 1 Higher order byte of data 1
Add3 : data 2 Lower order byte of data 2
Add4 : data 2 Higher order byte of data 2
Add5 : Lower order byte of Result
Add6 : Lower order byte of Result
Add7 : Higher order byte of Result
Add8 : Higher order byte of Result
1 word = 16 bits &
1 byte = 8 bits
vii) 8 – bit Division:
MVI D,00
LDA add1
MOV B,A
LDA add2
Loop2 :CMP B
JC Loop 1
SUB B
INR D
JMP Loop 2
7
Loop1: STA add3
MOV A,D
STA add4
HLT
Result:
Add1: dividend
Add2 : divisor
Add3 : Remainder
Add4 : Quotient
viii) 16 – bit division:
LXI B,0000
LHLD add1
XCHG
LHLD add3
L2 : SPHL
MOV A,E
SUB L
MOV L,A
MOV A,D
SBB H
JC L1
INX B
MOV H,A
JMP L2
LXI H,0000
DAD SP
SHLD add5
MOV H,B
8
MOV L,C
SHLD add7
HLT
RESULT:
Add1: dividend - LOB
Add2 : dividend - HOB
Add3: divisor - LOB
Add4 : divisor - HOB
Add5 : Remainder - LOB
Add6 : Remainder - HOB
Add7 : Quotient - LOB
Add8 : Quotient - HOB
ix) Conversion of a Hexadecimal number to a BCD number:
LDA add1
MVI B,00
MVI C,64
MVI D,0A
MVI H,00
Loop2 : CMP C
JC Loop1
SUB C
INR B
JMP Loop2
Loop1 : CMP D
JC Loop3
SUB D
INR D
JMP Loop1
9
MOV L,A
MOV A,D
RLC
RLC
RLC
RLC
ADD L
STA add2
MOV A,B
STA add3
HLT
RESULT:
Add1: hexadecimal number
Add2: lower order byte of BCD
Add 3: higher order byte of BCD
x) Conversion of a BCD number to hexadecimal number:
MVI H,00
MVI L,0A
MOV B,A
ANI 0F
MOV E,A
MOV A,B
ANI F0
RRC
RRC
RRC
RRC
MOV C,A
MVI A,00
Loop2:ADDC
DCR L
JNZ Loop2
ADD E
10
STA add2
HLT
RESULT:
Add1: data1(BCD)
Add2: result (Hexa)
xi) Convert an array of ASCII numbers into their equivalent character :
LXI H, add1
MVI B, count
LXI D,add2
Loop1 : MOV A,M
CALL Conversion
STAX D
INX H
INX D
DCR B
JNZ Loop1
HLT
Conversion : SUI 30H
CMP 09
JC Loop2
SUI 07
Loop2 : RET
xii) Conversion of BCD/hexa number to ASCII:
LDA add1
MOV B,A
ANI 0F
11
MOV C,A
MOV A,B
ANI F0
RRC
RRC
RRC
RRC
CALL Conversion
STA add2
MOV A,C
CALL Conversion
STA add3
HLT
Conversion: CPI 0A
JC Loop1
ADI 07
Loop1 : ADI 30
RET
RESULT :
Add1: Packed BCD number
Add2: ASCII of HOB
Add3: ASCII of LOB
xiii) Moving a block of data from one location to another:
LXI H, add1
LXI B, add2
MVI D, count
Loop1: MOV A,M
12
STAX B
INX H
INX B
DCR D
JNZ Loop1
HLT
RESULT :
Add1 : Starting add of source
Add2: Starting add of destination
xiv) Adding an array of data:
LXI H, add
MVI D,00
MOV C,M
INX H
MOV A,M
Loop1: INX H
MOV B,M
ADD B
JNC Loop
INR D
Loop : DCR C
JNZ Loop1
STA add1
MOV A,D
STA add2
HLT
13
EX.NO.2 PROGRAMS FOR SORTING/ SEARCHING (USING
8085,8086)
i) Sorting of an array of 8-bit numbers using 8085
LXI H,add1
MOV B,M
MOV C,B
Loop3: LXI H,add1
MOV D,B
Loop2: MOV A,M
INX H
MOV B,M
CMP B
JC / JNC Loop1
MOV M,A
DCX H
MOV M,B
INX H
Loop1: DCR D
JNZ Loop2
DCR C
JNZ LooP3
HLT
ii) Searching a number in an array of data using 8085
MVI D,00
LXI H, add
MOV C,M
INX H
MOV B,M
Loop2: INX H
14
MOV A,M
CMP B
JNZ Loop1
INR D
Loop1: DCR C
JNZ Loop2
MOV A,D
STA add
HLT
iii) Sorting an array of 8-bit numbers using 8086
MOV SI, add
MOV BL, [SI]
MOV DL,BL
Loop3: MOV SI,add2
MOV DH, BL
Loop2: MOV AL,[SI]
INC SI
MOV BH,[SI]
CMP AL,BH
JC/JNC Loop1
MOV [SI],AL
DEC SI
MOV [SI],BH
INC SI
Loop1: DEC DH
JNZ Loop2
DEC DL
JNZ Loop3
HLT
15
iv) Sorting an array of 16-bit number using 8086
MOV SI, add
MOV BL, [SI]
MOV DL,BL
Loop3: MOV SI,add2
MOV DH, BL
Loop2: MOV AX,[SI]
INC SI
INC SI
MOV CX,[SI]
CMP AX,BX
JC/JNC Loop1
MOV [SI],AX
DEC SI
DEC SI
MOV [SI],CX
INC SI
INC SI
Loop1: DEC DH
JNZ Loop2
DEC DL
JNZ Loop3
HLT
16
v) Searching For A Number Using 8086
MOV DI, starting address of the string
CLD
MOV AL, number to be searched
MOV CX, count
REPNE SCASB
JNZ LOOP1
DEC DI
MOV [2000H], DI; Displays the location of the searched data if found in the string at
the memory location 2000H
JMP LOOP2
LOOP1: MOV [2000H], 0000H ; Displays 0000H at the memory location 2000H, if
the
Searched data is not found in the string
LOOP2: HLT
17
EX.NO. 3 PROGRAMS FOR STRING MANIPULATION OPERATIONS
(USING 8086)
a) Program to move a string of 16-BIT data from locations in data
segment to locations in extra segment:
MOV CX, COUNT
MOV DI,OFFSET OF DESTINATION
MOV SI, OFFSET OF SOURCE
REP MOVSW
HLT
b) Program to compare whether two strings of data are equal. If so, store
AAH at location 5000h, if not store DDH:
MOV CX, COUNT
MOV DI, OFFSET OF STRING 1
MOV SI, OFFSET OF STRING2
REPE CMPB
JNZ LOOP
MOV [5000H], AAH
JMP END
LOOP: MOV [5000H], DDH
END: HLT
18
EX. NO. 4 PROGRAMS FOR DIGITAL CLOCK AND STOP WATCH
(USING 8086)
Program that places a message on the screen every 10 seconds, using int
1ah;
CODE SEGMENT
TIMEDELAY:
MOV SP,1000H
MOV DI,10XD
TIME OUT:
MOV AH,00H
INT 1AH
MOV BX,DX
TIMER:
MOV AH, 00H
INT 1AH
SUB DX, BX
CMP DX, 182XD
JC TIMER
MOV AH, 09H
CS MOV DX,MSG
INT 21H
DEC DI
JNZ TIMEOUT
MOV AX,4C00H
INT 21H
MSG:
DB 'TEN MORE SECONDS HAVE PASSED $'
CODE ENDS
19
20
EX.NO.5 ADC & DAC INTERFACING WITH 8051
ADC Interfacing
MOV DPTR, #add1
MOV A, #data1
MOVX @DPTR,A
MOV A,#data2
MOVX @DPTR,A
MOV DPTR,#add2
MOV A,#data3
MOVX @DPTR,A
MOV A,#data4
MOVX @DPTR,A
HERE : SJMP HERE
Add1 - address to select the channel, send ALE & OE signals
Add2 - address to send the SOC signal
Data1 - data to select the channel, ALE low & OE high
Data2 - data to select the channel, ALE high & OE high
Data3 - send SOC high D0 - high
Data4 - send SOC low D0 - low
21
Channel No. Data to make Data to make
ALE low & OE high ALE high & OE high
CH0 10 18
CH1 11 19
CH2 12 1A
CH3 13 1B
CH4 14 1C
CH5 15 1D
CH6 16 1E
CH7 17 1F
22
DAC Interfacing
i) Program to generate a square wave:
START: MOV DPTR,#00
MOV A,#00
MOVX @DPTR,A
LCALL DELAY
MOV A,#FF
MOVX @ DPTR,A
LCALL DELAY
SJMP START
DELAY: MOV R1,#FF
L2: MOV R2,#FF
L1: DJNZ R2,L1
DJNZ R1,L2
RET
ii) Program to generate a saw tooth wave
MOV DPTR,#add1
MOV A,#00
LOOP : MOVX @DPTR,A
INC A
SJMP LOOP
23
EX.NO.6 PARALLEL COMMUNICATION BETWEEN TWO MP
KITS USING MODE1 & MODE2 OF 8255
MODE1:
TRANSMITTER:
MVI A,A0 ; Control word to set PA as output port in mode1
OUT CR
LOOP: IN PC ; Checking for the status of OBF
ANI 90
JZ LOOP
MVI A,DATA; Transfer data
OUT PA
HLT
RECEIVER:
MVI A,B0 ; Control word to set PA as input port in mode1
OUT CR
LOOP: IN PC ; Checking for the status of IBF
ANI 20
JZ LOOP
IN PA ; Get data
STA ADD
HLT
24
MODE 2:
KIT 1:
MVI A,C0 ;Control word to set PA in mode2
OUT CR
LOOP: IN PC ; Check the status of OBF
ANI 90
JZ LOOP
MVI A, DATA ; Transfer data
OUT PA
LOOP1: IN PC ; Check the status of IBF
ANI 20
JZ LOOP1
IN PA ; Get data
STA ADD
HLT
KIT2:
MVI A, C0 ; Control word to set PA in mode2
OUT CR
LOOP: IN PC ; check the status of IBF
ANI 20
JZ LOOP
IN PA ; get data
STA ADD
LOOP1: IN PC ; Control word to set PA in mode2
ANI 90
JZ LOOP1
MVI A, DATA ; Transfer data
OUT PA
HLT
25
EX. NO. 7 INTERFACING & PROGRAMMING 8279,8259
Interfacing 8279 with 8085 microprocessor
Program to roll a message:
START: MVI A,01 ;Control word to set keyboard & display modes
OUT CR of 8279
MVI A,CC ;Control word to clear display
OUT CR of 8279
MVI A,90 ;Control word to write display RAM
OUT CR of 8279
LXI H, Address ;loading HL Rp with the starting address of the
Loopup table.
MVI B, Count ;No. of characters to be displayed
LOOP: MOV A,M ; get the data & send it to 8279
OUT DR of 8279
CALL DELAY
INX H
DCR B
JNZ LOOP
JMP START
DELAY: LXI D,COUNT
LOOP1: DCX D
MOV A,D
ORA E
JNZ LOOP1
RET
26
Interfacing 8259 with 8085 microprocessor
Initialize 8259 with the following specifications:
ICW4 needed, single 8259, Interval of ------(8085), Edge triggered mode, Vector
address(8085)/ Type number(8086) of IR0 ------, ------- mode, Normal EOI, Non-
buffered mode, Not special fully nested mode, Mask all interrupts except ---------.
A0 – Address with A0 = 0
A1 – Address with A0 = 1
Using 8085:
MVI A, ICW1
OUT A0
MVI A,ICW2
OUT A1
MVI A,ICW4
OUT A1
MVI A,OCW1
OUT A1
HLT
ISR: MVI A,OCW2 ; Non-specific EOI command
OUT A0
HLT
27
Using 8086:
MOV AL,ICW1
OUT A0,AL
MOV AL,ICW2
OUT A1,AL
MOV AL,ICW4
OUT A1,AL
MOV AL,OCW1
OUT A1,AL
STI
HLT
Vector Table: offset address - Interrupt type * 4
0000: offsetaddress - Segment Address : Offset address of the ISR
ISR: MOV AL,OCW2
OUT A0,AL
HLT
28
EX. NO. 8 SERIAL COMMUNICATION BETWEEN TWO
KITS(8085/8086) USING 8251,8253
TRANSMITTER END:
MVI A,36 ; Control word for 8253
OUT CR OF 8253
MVI A,0A ; LSB Count for Counter0
OUT Counter 0 of 8253
MVI A,00 ; MSB Count for Counter0
OUT Counter 0 of 8253
MVI A,4E ; Mode word
OUT CR of 8251
MVI A,37 ; Control word
OUT CR of 8251
LOOP: IN CR of 8251 ; Checking for the status of TXE signal
ANI 04
JZ LOOP
MVI A,data ; Transmit data
OUT DR of 8251
HLT
29
RECEIVER END:
MVI A,36 ; Control word for 8253
OUT CR OF 8253
MVI A,0A ; LSB Count for Counter0
OUT Counter 0 of 8253
MVI A,00 ; MSB Count for Counter0
OUT Counter 0 of 8253
MVI A,4E ; Mode word
OUT CR of 8251
MVI A,37 ; Control word
OUT CR of 8251
LOOP: IN CR of 8251 ; Checking for the status of RXRDY signal
ANI 02
JZ LOOP
IN DR of 8251 ; receive data
STA address ; Save the received data in a memory location
HLT
30
EX. NO. 9 INTERFACING & PROGRAMMING OF STEPPER MOTOR &
DC MOTOR USING 8051
Interfacing stepper motor
Start : MOV DPTR, # add1
MOV R0,#04
L4: MOVX A,@DPTR
PUSH DPH
MOV DPL
MOV DPTR, #add1
MOV R2, #d1
L3: MOV R1,#d2
L2: MOV R3,#d3
L1: DJNZ R3,L1
DJNZ R1,L2
DJNZ R2,L3
MOVX @DPTR,A
POP DPL
POP DPH
INC DPTR
DJNZ R0,L4
SJMP START
Add1 – address of data
For example : 4500
4500 : 09
4501 : 05
4502 : 06
4503 : 0A
d1,d2,d3 - data for delay
31
Interfacing DC motor
MOV DPTR, #FF08
MOV A,#80
MOV @DPTR,A
L1: MOV DPTR,#4200
MOVX A,@DPTR
MOV DPTR, #FF0D
MOVX @DPTR,A
MOV DPTR, #FF08
MOV A,#40
MOVX @DPTR,A
MOV A,#00
MOVX @DPTR,A
MOV DPTR, #4201
MOVX A, @DPTR
MOVX DPTR, #FF0D
MOVX @DPTR,A
MOV DPTR, #FF0E
MOV A, #80
MOVX @DPTR, A
MOV A,#00
MOVX @DPTR, A
SJMP L1
32
EX.NO.10 PROGRAMMING USING ARITHMETIC, LOGICAL AND BIT
MANIPULATION INSTRUCTIONS OF 8051
MICROCONTROLLER
a) Program to count the number of even & odd numbers in an array of
numbers:
MOV DPTR, #4500H
MOVX A, @DPTR
MOV R0, A
MOV R1,#00H
MOV R2,#00H
LOOP2: INC DPTR
MOV A, @DPTR
MOV B, 02H
DIV AB
CJNE B,#00,LOOP
INC R1
SJMP LOOP1
LOOP: INC R2
LOOP1: DJNZ R0,LOOP2
MOV DPTR,#5000h
MOV A,R1
MOVX @DPTR,A
INC DPTR
MOV A,R2
MOVX @DPTR,A
HERE: SJMP HERE
33
b) Program to separate a byte into its lower & upper nibble:
MOV DPTR,#4500H
MOVX A,@DPTR
MOV R0,A
ANL A,#F0H
RL
RL
RL
RL
MOV R1,A
MOV A,R0
ANL A,#0FH
INC DPTR
MOVX @DPTR,A
MOV A,R1
INC DPTR
MOVX @DPTR,A
HERE: SJMP HERE
34
c) Program to see if bits 5 & 6 of memory location 5000H are 1. If not
make so and save it at memory location 5001H:
MOV DPTR,#5000H
MOVX A,@DPTR
MOV B.A
JB B.5H, LOOP1
SETB B.5
LOOP1: JB B.6,LOOP2
SETB B.6
LOOP2: MOV A,B
INC DPTR
MOVX @DPTR,A
HERE: SJMP HERE
35
EX.NO.11 PROGRAMS TO VERIFY TIMER, INTERRUPTS & UART
OPERATIONS IN 8031 MICROCONTROLLER
a) Program to generate a square wave of frequency --------.
Steps to determine the count:
Let the frequency of sqaurewave to be generated be Fs KHz.
And the time period of the squarewave be Ts Sec.
Oscillator Frequency = 11.0592MHz.
One machine cycle = 12 clock periods
Time taken to complete one machine cycle=12*(1/11.0592MHz)=
1.085microsec.
Y(dec) = (Ts/2)/(1.085microsec)
Count(dec) = 65536(dec) – Y(dec)
= Count(hexa)
MOV TMOD,#10h ; To select timer1 & mode1 operation
L1: MOV TL1,#LOWERORDER BYTE OF THE COUNT
MOV TH1,#HIGHER ORDER BYTE OF THE COUNT
SETB TR1 ; to start the timer (TCON.6)
BACK: JNB TF1,BACK ; checking the status of timerflag1(TCON.7) for
overflow
CPL Px.x ; get the square wave through any of the portpins
; eg. P1.2 (second bit of Port 1)
CLR TR1 ; stop timer
CLR TF1 ; clear timer flag for the next cycle
SJMP L1
36
b) Program to transfer a data serially from one kit to another.
Transmitter:
MOV TMOD,#20H ; Mode word to select timer1 & mode 2
MOV TL1,#FDH ; Initialize timer1 with the count
MOV TH1,#FFH
MOV SCON,#50H ; Control word for serial communication
to
to select serial mode1
SETB TR1 ; Start timer1
MOV A,#06h
MOV SBUF,A ; Transfer the byte to be transmitted to
serial
Buffer register.
LOOP: JNB TI, LOOP ; checking the status of Transmit
interrupt
flag
CLR TI
HERE: SJMP HERE
Receiver:
MOV TMOD,#20H
MOV TL1,#FDH
MOV TH1,#FFH
MOV SCON,#50H
SETB TR1
LOOP: JNB RI,LOOP
MOV A,SBUF
MOV DPTR,#4500H
MOVX @DPTR,A
CLR RI
HERE: SJMP HERE
37
EX.NO.12 COMMUNICATION BETWEEN 8051 MICROCONTROLLER
KIT & PC
SERIAL COMMUNICATION
8051>H
HELP MENU
D Display data, program, internal, bit memory or registers
E Edit data, program, internal, bit memory or registers
S Single step from specified address, press SP to terminate
G Execute the program till user break
B Set address till where the program is to be executed
C Clear break points
F10 Key followed by 4 key at the PC to upload data to a file (DOS)
T Test the onboard peripherals
: Download a file from PC mem to the SDA-SI-MEL kit (DOS)
A Assembler
Z Disassembler
TEST FOR ONBOARD PERIPHERALS
For SDA SI-MEL kit, following menu is displayed on pressing the option "T"
8051>T
ALS-SDA SI-MEL Kit Test monitor
1. Test internal Data RAM
2. Test external Data Memory (U6)
3. Test external Data memory (U7)
4. 8255 loop test
38
5. Test 8253
6. Exit
Select (1-6):
Suppose the user presses the key '1', following message is displayed if the internal
data RAM is OK.
Testing internal data RAM: Pass
After displaying the message, the menu is displayed once again waits for user to enter
a key
EDITING MEMORY COMMAND:
8051>E
EDIT (R,B,M,P,D)…D - EXTERNAL DATA RAM
Enter STA address = 0400
0400 = 7F:55 Press 'N' key to go to the next address
0401 = D5:66
0402 = D3:77
0403 = 73:88
0404 = 6F:12
0405 = CB:01
0406 = A7:02 Press 'P' key to go to the previous address
0407 = 6F:03
0408 = 7B:04
0409 = 29:05
040A = 6F:06
040B = 73:07
040C = FF:08
040D = 7D:09 Press 'CR' key to have the same address
040E = 09:90 Press 'ESC' Key to abort the command
39
8051>E
EDIT (R,B,M,P,D)…B - BITS
Enter STA address = 00
00 = 0:1
01= 0:1
02 = 0:0
03 = 0:1
03 = 1:
03 = 1:
02 = 0:
8051>E
EDIT (R,B,M,P,D)…R- REGISTERS
ACC = 00:33
PSW = 00:44
DPH = 00:55
DPL = 00:00
DPL = 00:00
8051>E
EDIT (R,B,M,P,D)…-P = PROGRAM CODE
8000 = FF:78
8001 = FF:10
8002 = FF:79
8003 = FF:20
8004 = FF:7A
8005 = FF: 12
8007 = FF : 00
8008 = FF : 03
8009 = FF : 0F
8051>E
EDIT (R,B,M,P,D)…-M - INTERNAL RAM
40
0000 = 00 : 12
0001 = 00 : 34
0002 = 00 : 00
DISPLAY COMMAND
8051>D
EDIT (R,B,M,P,D)…-EXTERNAL DATA RAM
Enter STA address = 0400
Enter END address = 040F
0500 55 66 77 88 12 01 02 03 04 05 06 07 08 09 04 D7
SETTING BREAK COMMAND :
8051>B
BR _ NO: R
BR_ADD 0000
ERROR! ONLY A BREAKS ALLOWED
8051>B
BR _ NO: 0
ERROR! BREAK NUMBERS MUST BE BETWEEN 1 & 8
CLEAR BREAK COMMAND:
8051>C
BR_N0:A Clears all the break point set by the user
8051>C
BR_N0:1 Clears the break point number 1
41
PROGRAMME EXECUTION COMMAND:
8051>G
PROGRAM EXECUTION
ENTER START ADDRESS = 8000
ACC PSW DPH DPL PCH PCL SP B R0 R1 R2 R3 R3 R4 R5 R6 R7
33 44 55 00 10 34 00 00 00 00 00 00
ASSEMBLE MEMORY COMMAND
8051>A
ENTER START ADDRESS = 8000
DISASSEMBLE MEMORY COMMAND
8051>Z
42