Basic Arithmetic Operation

Addition with Carry Flag

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expt1b.asmLast updated: Sep 20, 2026

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Output Terminal

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Basic Arithmetic Operation

Explanation

Here is the explanation of the 8085 Assembly Language program:

1. Purpose

This program demonstrates 8-bit arithmetic addition and register overflow. It adds 1 to the maximum 8-bit value (0xFF or 255), causing the register to roll over to 0x00 and generate a carry.

2. Key Concepts

Immediate Addressing (MVI): Loading fixed values directly into registers.
Register Arithmetic (ADD): Performing addition using register contents.
8-bit Overflow & Flags: Handling operations that exceed the 8-bit limit ($FF + 01 = 100_{16}$), which updates processor flags like Carry (CY) and Zero (Z).

3. Code Walkthrough

MVI A, 0FFH — Loads the hex value FF (decimal 255) into the Accumulator (

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Basic Arithmetic Operation

Explanation

Here is the explanation of the 8085 Assembly Language program:

1. Purpose

This program demonstrates 8-bit arithmetic addition and register overflow. It adds 1 to the maximum 8-bit value (0xFF or 255), causing the register to roll over to 0x00 and generate a carry.

2. Key Concepts

Immediate Addressing (MVI): Loading fixed values directly into registers.
Register Arithmetic (ADD): Performing addition using register contents.
8-bit Overflow & Flags: Handling operations that exceed the 8-bit limit ($FF + 01 = 100_{16}$), which updates processor flags like Carry (CY) and Zero (Z).

3. Code Walkthrough

MVI A, 0FFH — Loads the hex value FF (decimal 255) into the Accumulator (