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230 lines
7.0 KiB
Swift
230 lines
7.0 KiB
Swift
//
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// TimingTests.swift
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// Clock Signal
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//
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// Created by Thomas Harte on 13/08/2015.
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// Copyright 2015 Thomas Harte. All rights reserved.
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//
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import Foundation
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import XCTest
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class MOS6502TimingTests: XCTestCase, CSTestMachineTrapHandler {
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private var endTime: UInt32 = 0
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private let machine = CSTestMachine6502(processor: .processor6502)
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func testImplied() {
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let code: [UInt8] = [
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0xea, // [2] NOP
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0x88, // [2] DEY
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0xca, // [2] DEX
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0x18, // [2] CLC
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0x2a, // [2] ROL A
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]
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runTest(code, expectedRunLength: 10)
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}
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func testLDA() {
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let code: [UInt8] = [
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0xa9, 0x00, // [2] LDA #$00
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0xa5, 0x00, // [3] LDA $00
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0xb5, 0x00, // [4] LDA $00,X
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0xad, 0x00, 0x00, // [4] LDA $0000
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0xbd, 0x00, 0x00, // [4] LDA $0000, x (no wrap)
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0xbd, 0x02, 0x00, // [5] LDA $0002, x (wrap)
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0xb9, 0x00, 0x00, // [4] LDA $0000, y (no wrap)
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0xb9, 0x10, 0x00, // [5] LDA $0010, y (wrap)
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0xa1, 0x44, // [6] LDA ($44, x)
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0xb1, 0x00, // [5] LDA ($00), y (no wrap)
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0xb1, 0x02, // [6] LDA ($01), y (wrap)
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]
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runTest(code, expectedRunLength: 48)
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}
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func testBIT() {
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let code: [UInt8] = [
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0x24, 0x2a, // [3] BIT $2a
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0x2c, 0x2a, 0x2b, // [4] BIT $2b2a
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]
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runTest(code, expectedRunLength: 7)
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}
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func testSTA() {
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let code: [UInt8] = [
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0x85, 0x00, // [3] STA $00
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0x95, 0x00, // [4] STA $00,X
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0x8d, 0x00, 0x00, // [4] STA $0000
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0x9d, 0x00, 0x00, // [5] STA $0000, x (no wrap)
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0x9d, 0x02, 0x00, // [5] STA $0002, x (wrap)
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0x99, 0x00, 0x00, // [5] STA $0000, y (no wrap)
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0x99, 0x10, 0x00, // [5] STA $0010, y (wrap)
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0x81, 0x44, // [6] STA ($44, x)
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0x91, 0x00, // [6] STA ($00), y (no wrap)
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0x91, 0x02, // [6] STA ($01), y (wrap)
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]
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runTest(code, expectedRunLength: 49)
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}
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func testINC() {
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let code: [UInt8] = [
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0xe6, 0x00, // [5] INC $00
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0xf6, 0x00, // [6] INC $00,X
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0xee, 0x00, 0x00, // [6] INC $0000
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0xfe, 0x00, 0x00, // [7] INC $0000, x (no wrap)
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0xfe, 0x02, 0x00, // [7] INC $0002, x (wrap)
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]
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runTest(code, expectedRunLength: 31)
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}
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func testJSR() {
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let code: [UInt8] = [
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0x20, 0x04, 0x02, // [6] JSR $0204
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0x00,
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0x60, // [6] RTS
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]
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machine.addTrapAddress(0x0203)
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runTest(code, expectedRunLength: 12)
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}
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func testJMP() {
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let code: [UInt8] = [
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0x6c, 0x04, 0x00, // [5] JMP ($0004)
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0x00, 0x00, 0x00, 0x00, 0x00,
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0x4c, 0x0b, 0x02, // [3] JMP 020b
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]
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runTest(code, expectedRunLength: 8)
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}
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func testPHAPLA() {
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let code: [UInt8] = [
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0x48, // [3] PHA
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0x48, // [3] PHA
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0x68, // [4] PLA
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]
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runTest(code, expectedRunLength: 10)
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}
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func testBCS() {
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let code: [UInt8] = [
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0x18, // [2] CLC
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0xb0, 0xff, // [2] BCS -1 (not taken)
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0x90, 0x7f, // [3] BCC +7f (taken)
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x90, 0x00, // [3] BCC 0 (taken)
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0x90, 0x7f, // [4] BCC +6f (taken, page wrap)
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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]
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runTest(code, expectedRunLength: 14)
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}
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func testSnippet1() {
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let code: [UInt8] = [
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0x8d, 0x08, 0x00, // [4] STA $0008
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0xc6, 0xb4, // [5] DEC $B4
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]
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runTest(code, expectedRunLength: 9)
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}
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func testSnippet2() {
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let code: [UInt8] = [
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0x16, 0x16, // [6] ASL $16, x
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0x46, 0x46, // [5] LSR $46
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]
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runTest(code, expectedRunLength: 11)
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}
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func testSnippet3() {
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let code: [UInt8] = [
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0x20, 0x04, 0x02, // [6] JSR $0204
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0x00,
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0x86, 0x09, // [3] STX $09
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0x86, 0x09, // [3] STX $09
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0x85, 0x09, // [3] STA $09
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0x85, 0x09, // [3] STA $09
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0x86, 0x09, // [3] STX $09
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0x86, 0x09, // [3] STX $09
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0x86, 0x09, // [3] STX $09
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0x85, 0x09, // [3] STA $09
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0x86, 0x09, // [3] STX $09
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0x86, 0x09, // [3] STX $09
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0x85, 0x09, // [3] STA $09
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0x86, 0x09, // [3] STX $09
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0x86, 0x09, // [3] STX $09
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0x86, 0x09, // [3] STX $09
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0x86, 0x09, // [3] STX $09
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0x86, 0x09, // [3] STX $09
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0x86, 0x09, // [3] STX $09
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0x87, 0x09, // [3] SAX $09
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0x60, // [6] RTS
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]
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machine.addTrapAddress(0x0203)
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runTest(code, expectedRunLength: 66)
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}
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func testNOP() {
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let code: [UInt8] = [
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0x04, 0x00, // [3] NOP zpg
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0x14, 0x00, // [4] NOP zpg, x
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0x34, 0x00, // [4] NOP zpg, x
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0x44, 0x00, // [3] NOP zpg
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0x54, 0x00, // [4] NOP zpg, x
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0x64, 0x00, // [3] NOP zpg
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0x74, 0x00, // [4] NOP zpg, x
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0x80, 0x00, // [2] NOP #
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0x82, 0x00, // [2] NOP #
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0x89, 0x00, // [2] NOP #
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0xc2, 0x00, // [2] NOP #
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0xd4, 0x00, // [4] NOP zpg, x
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0xe2, 0x00, // [2] NOP #
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0xf4, 0x00, // [4] NOP zpg, x
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]
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runTest(code, expectedRunLength: 43)
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}
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private func runTest(_ code: [UInt8], expectedRunLength: UInt32) {
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machine.trapHandler = self
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let immediateCode = Data(code)
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machine.setData(immediateCode, atAddress: 0x200)
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machine.addTrapAddress(UInt16(0x200 + code.count))
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machine.setValue(0x00, forAddress: 0x0000)
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machine.setValue(0x00, forAddress: 0x0001)
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machine.setValue(0xff, forAddress: 0x0002)
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machine.setValue(0x00, forAddress: 0x0003)
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machine.setValue(0x08, forAddress: 0x0004)
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machine.setValue(0x02, forAddress: 0x0005)
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machine.setValue(0x200, for: CSTestMachine6502Register.programCounter)
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machine.setValue(0xff, for: CSTestMachine6502Register.X)
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machine.setValue(0xfe, for: CSTestMachine6502Register.Y)
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endTime = 0
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while endTime == 0 {
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machine.runForNumber(ofCycles: 10)
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}
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XCTAssertEqual(endTime, expectedRunLength, "Took \(endTime) cycles to perform rather than \(expectedRunLength)")
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}
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func testMachine(_ testMachine: CSTestMachine, didTrapAtAddress address: UInt16) {
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if endTime == 0 {
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endTime = (machine.timestamp / 2) - 1
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}
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}
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}
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