Welcome to the CTF 6502 challenge!
In this CTF challenge, the MOS 6502 has returned. This time it doesn't power a home video game console or computer system like the Nintendo Entertainment System or the Commodore 64.
This time it's hiding our flag! Let's travel back in time to the beginning of the home computer revolution, whip out our programming manual and get our hands dirty with some good old 6502-assembly.
Implement the missing opcode in the
OPCODE_0x49-method and fix the machine code in the
When you're done you should be able to read the flag in the memory dump at memory address
Good luck, I'll see you in the future!
Program.cs-file is attached. Run it any way you prefer. Or use .NET Fiddle to run it in your browser here: https://dotnetfiddle.net/VDGK8P)