This is an assembler for a custom Instruction Set Architecture (ISA) implemented in Python. The assembler can decode and process a set of instructions, check for errors, and generate binary code for a CPU with limited instruction formats.
This assembler is designed for a custom ISA with a limited set of instructions, each represented by a specific opcode and operand format. The supported instruction types are A, B, C, D, E, and F, each with its own unique encoding format. The program reads input instructions from a file named "stdin.txt" and outputs the corresponding binary code to "stdout.txt".
The ISA supports six types of instructions, each with a specific format:
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Type A Instructions (add, sub, mul, xor, or, and):
<Opcode> <Unused> <reg 1> <reg 2> <reg 3> 5 bits 2 bits 3 bits 3 bits 3 bits -
Type B Instructions (mov, ls, rs):
<Opcode> <Unused> <reg 1> <Immediate> 5 bits 1 bit 3 bits 7 bits -
Type C Instructions (mov, div, not, cmp):
<Opcode> <Unused> <reg 1> <reg 2> 5 bits 5 bits 3 bits 3 bits -
Type D Instructions (ld, st):
<Opcode> <Unused> <reg 1> <Memory Address> 5 bits 1 bit 3 bits 7 bits -
Type E Instructions (jmp, jlt, je, jgt):
<Opcode> <Unused> <Memory Address> 5 bits 4 bits 7 bits -
Type F Instructions (hlt):
<Opcode> <Unused> 5 bits 11 bits
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Clone this repository to your local machine:
git clone https://github.com/your-username/custom-isa-assembler.git
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Navigate to the project directory:
cd custom-isa-assembler -
Prepare the input file "stdin.txt" with a list of instructions to be processed.
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Run the assembler with Python:
python assembler.py
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The assembler will process the input instructions and write the binary output to "stdout.txt." Any encountered errors will also be displayed in "stdout.txt."
This project was created by the following contributors in 2023:
Please feel free to contribute to this project, report issues, or suggest improvements.
Happy coding! 🚀