About

An Emulator of the classic MOS6502 micro-computer which has been around in 1970's-80's written in Verilog hdl.

Objective of this project is to understand how this simple yet powerful, 8-bit, commercially available processor worked at the gate level or may be simply to get a taste of what it feels to be a programmer working with voltage levels across various components in hardware.

The project features a 8-bit processor with a data bus, 2 8-bit address bus and a special bus used for data transfer. A 16 bit memory addressing is possible allowing a maximum of 65,535 bytes of primary memory(RAM). General purpose registers include an Accumulator, X and Y registers available for programmer.

The ALU is capable of performing arithmetic operations like addition, subtraction and bit operations like AND, OR, XOR, shift and rotate.

It also has an 8-bit status register and a stack pointer extending stack from 0x0100 to 0x01FF in memory. The whole system works on a two-phase clock.