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8085 Program to Simulate Decimal Up Counter
Now let us see a program of Intel 8085 Microprocessor. In this program we will see how to simulate the decimal up counter.
Problem Statement:
Write 8085 Assembly language program to simulate decimal up counter.
Discussion:
In this section we are simulating the decimal up counter. Here the counter will count 100 decimal numbers from 0 to 99. All values will be updated in each 0.5 seconds. For decimal count we are using the DAA instruction.
Note: Here for simplicity we are storing the numbers into memory. To simulate it like a counter we can use 7-segment display to show the numbers
Input:
Here we are not providing any input.
Flow Diagram:
Program:
Address |
HEX Codes |
Labels |
Mnemonics |
Comments |
---|---|---|---|---|
F000 |
AF |
XRA A |
Initialize A with 00H |
|
F001 |
32, 00, 80 |
LOOP |
STA 8000H |
Store A into 8000H |
F004 |
CD, 10, F0 |
CALL DELAY |
Wait for 0.5 second |
|
F007 |
3A, 00, 80 |
LDA 8000H |
Get back the data from 8000H |
|
F00A |
C6, 01 |
ADI 01H |
Add 01H with the number |
|
F00C |
27 |
DAA |
Decimal adjust |
|
F00D |
C3, 01, F0 |
JMP LOOP |
Jump to LOOP |
|
F010 |
01, FF, FF |
DELAY |
LXI B,FFFFH |
Initialize BC register pair to FFFFH |
F013 |
0B |
L1 |
DCX B |
Decrease BC |
F014 |
78 |
MOV A,B |
Take B to A |
|
F015 |
B1 |
ORA C |
OR C and E |
|
F016 |
C2, 13, F0 |
JNZ L1 |
If Z = 0, jump to L1 |
|
F014 |
C9 |
RET |
Return from subroutine |
Output:
The numbers are storing into memory location 8000H.
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