There is already an existing project (albeit defunct) named j6502. Name changed to lm6502.

src/main/java/com/loomcom/lm6502/Cpu.java

@@ -0,0 +1,73 @@
+package com.loomcom.lm6502;
+
+/**
+ * Main 6502 CPU Simulation.
+ */
+public class Cpu {
+
+	/**
+	 * The Program Counter.
+	 */
+	private int m_pc;
+
+	/**
+	 * The system stack pointer.
+	 */
+	private int m_sp;
+
+	/**
+	 * Reference to the simulator
+	 */
+	private Simulator m_sim;
+
+	public Cpu(Simulator sim) {
+		reset();
+		this.m_sim = sim;
+	}
+
+	/**
+	 * Reset the CPU to known initial values.
+	 */
+	public void reset() {
+		m_sp = 0x01ff;
+		/* locations fffc and fffd hold the reset vector address */
+		m_pc = 0xfffc;
+	}
+
+	/**
+	 * Trigger a maskable interrupt.
+	 */
+	public void interrupt() {
+	}
+
+	/**
+	 * Trigger a nonmaskable interrupt.
+	 */
+	public void nmiInterrupt() {
+	}
+
+	/**
+	 * @return An address specified by the two bytes immediately following the
+	 *         Program Counter.
+	 */
+	private int readAddress() {
+		return readAddress(m_pc);
+	}
+
+	/**
+	 * Read the two bytes located at <tt>addr</tt> and <tt>addr + 1</tt>,
+	 * and return the address held there.
+	 *
+	 * @param address
+	 * @return The address specified in the two bytes at location <tt>addr</tt>
+	 */
+	private int readAddress(int address) {
+		return (m_sim.read(address)<<8 & m_sim.read(address+1));
+	}
+
+	public Simulator getSimulator() {
+		return m_sim;
+	}
+
+}
+