8085 program for hexadecimal counter

Now let us see a program of Intel 8085 Microprocessor. In this program we will see how to simulate the hexadecimal counter.

Problem Statement

Write 8085 Assembly language program to simulate hexadecimal counter.

Discussion

Hexadecimal counters in 8085 is similar to the binary counter. There are two different parts. The main counting part and the delay part. We have to define a delay subroutine to generate delay between each number while counting. We are considering that we have some external display which are connected through IO port, that will display the result in hexadecimal form.

Input

Here we are not providing any input.

Flow Diagram

Program

Address	HEX Codes	Labels	Mnemonics	Comments
F000	06, FF		MVI B,FFH	Store FF into B
F002	04	NEXT	INR B	Increment B
F003	0E, FF		MVI C,FFH	Store FF into C
F005	0D	DELAY	DCR C	Decrease C by 1
F006	C2, 05, F0		JNZ DELAY	Delay for FF time
F009	78		MOV A,B	Load A with B
F00A	D3, 10		OUT 10H	Send output to port 10
F00C	C3, 02, F0		JMP NEXT	Jump to NEXT