A C++ emulator of the 6502 microprocessor, known for its use in the NES, Apple II, Atari 2600, Commodore 64, and many more influential systems.
To input code to be executed, you give a command line argument of the filepath to an assembled binary file with either the -f argument or as the last argument given. You can also input the assembled machine code directly as a string with the -o option.
Here is the list of options.
6502 HELP
Usage:
6502.exe [-options | --flags] [-o code] [-f] {file}
Options:
-? Display help and stop execution (this message).
-sa {x} Set the starting address for the ROM. Prefix with "0x" for hex input (default 0x0000).
-mr {x} Set the number of rows to print out when displaying memory (default 8).
-ml {x} Set the length of rows to print out when displaying memory (default 16).
-ms {x} Set the starting value of memory to print rows from. Prefix with "0x" for hex input (default 0).
--m Disable the printing of memory once hitting a break (default true).
--a Disable ascii representation of printed memory (default true).
--i Disable the printing of instructions while executing (default true).
--p Enable the printing address (will only print at end if --m or --i) (default false).
--b Enable continuation on BRK, fetching position from IRQ vector (default false).
-pa {x} Set value of printing address. Prefix with "0x" for hex input (default 0xFFF9).
-mf {x} Set maximum operation frequency for emulator. Suffix with "k" or "m" for thousands or millions (default none).
-o {x} Directly input assembled machine code as string and ignore rest of input.
-f {x} Explicitly select the input file to be executed and ignore rest of input (default last arg).
You will need to assemble your program from 6502 assembly before inputting it into 6502.exe.
There are example programs in the ExamplePrograms folder. The examples come both in 6502 assembly source (.65s files) and assembled machine code (.out files).