/8085-emulator

8085 Emulator built using C++. It is a terminal application which accepts Assembly Level Language in 2 modes - either as an assembly language file or as line by line input.

Primary LanguageC++

8085-emulator

8085 Emulator built using C++. It is a terminal application which accepts Assembly Level Language in 2 modes - either as an assembly language file or as line by line input. In the absence of an 8085 microprocessor, this emulator can be used for learning purposes.

Introduction

  • Implemented the following instructions:

    1. Load and Store - MOV, MVI, LXI, LDA, STA, LHLD, SHLD, STAX, XCHG
    2. Arithmetic - ADD, ADI, SUB, INR, DCR, INX, DCX, DAD, SUI
    3. Branching - JMP, JC, JNC, JZ, JNZ
    • Also implemented an additional SET command to set data into memory locations. Example usage:
      • SET 2050 1A

  • Works in 2 modes:

    1. File mode - Append filename in the run command. 
      ./build/emulator <file_name>
    2. Line by line mode - Run command. 
      ./build/emulator
      • Enter STOP to stop emulator from taking input.

  • Displays the content of A, B, C, D, E, H, L, flag (5 flags) registers and the used memory locations.

Setting up

  • Create build directory.
mkdir build
  • Build the project at root level.
make
  • Test using the following command.
./build/emulator tests/test1.txt
  • Test line by line input by writing the code in test1.txt without the SET commands and input the suitable memory locations.
./build/emulator

Examples

  • Program to swap numbers at 2 different memory locations.
  • Program to find the greatest of 2 numbers (Result in 3050).