Add test harness for running Klaus's functional test

Author: bencoder

Processor.ts

@@ -58,6 +58,14 @@ export class Processor {
  this.reset();
  }
 
+ public setPC(pc: number) {
+ this.bigRegisters[PC] = pc;
+ }
+
+ public getPC() {
+ return this.bigRegisters[PC];
+ }
+
  public reset() {
  // set the PC to the reset vector
  this.registers = new Uint8Array(5);

test/README.md

@@ -0,0 +1 @@
+You will need 6502_functional_test.bin taken from (or compiled from) Klaus's test suite: https://github.com/Klaus2m5/6502_65C02_functional_tests/tree/master

test/TestRam.ts

@@ -0,0 +1,17 @@
+import { Addressable } from "../Addressable";
+
+export class TestRam implements Addressable {
+ private data: Uint8Array;
+
+ constructor(data: Uint8Array) {
+ this.data = data;
+ }
+
+ public read(location: number): number {
+ return this.data[location];
+ }
+
+ public write(location: number, data: number) {
+ this.data[location] = data;
+ }
+}

test/test.ts

@@ -0,0 +1,29 @@
+import { Processor } from "../Processor";
+import { readFileSync } from "fs";
+import { TestRam } from "./TestRam";
+
+const ramData = readFileSync("./6502_functional_test.bin");
+const ram = new TestRam(ramData);
+
+const processor = new Processor(ram);
+processor.setPC(0x0400);
+
+const startTime = Date.now();
+let cyclesSinceStart = 0;
+let hz = 1000000;
+const interval = setInterval(() => {
+ const secondsElapsed = (Date.now() - startTime) / 1000;
+ const totalExpectedCycles = secondsElapsed * hz;
+ while (cyclesSinceStart < totalExpectedCycles) {
+ const pcBefore = processor.getPC();
+ cyclesSinceStart += processor.tick(true);
+ if (processor.getPC() === pcBefore) {
+ console.log("TRAPPED");
+ const stack = ramData.subarray(0x100, 0x200);
+ console.log(stack.toString("hex").match(/../g)?.join(" "));
+ process.exit();
+ }
+ }
+}, 1);
+
+process.on("beforeExit", () => {});