140 lines
5.3 KiB
Swift
140 lines
5.3 KiB
Swift
//
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// ViewController.swift
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// FruitMachine
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//
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// Created by Christopher Rohl on 7/19/17.
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// Copyright © 2017 Christopher Rohl. All rights reserved.
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//
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import Cocoa
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class DebuggerViewController: NSViewController {
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@IBOutlet weak var text_CPU_A: NSTextField!
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@IBOutlet weak var text_CPU_X: NSTextField!
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@IBOutlet weak var text_CPU_Y: NSTextField!
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@IBOutlet weak var text_CPU_IP: NSTextField!
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@IBOutlet weak var text_CPU_SR: NSTextField!
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@IBOutlet weak var debuggerTableView: NSTableView!
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let CPU = CPUState.sharedInstance
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var disassembly: [Disassembly] = [Disassembly]()
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func updateCPUStatusFields() {
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text_CPU_A.stringValue = String(format:"%02X", CPU.accumulator)
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text_CPU_X.stringValue = String(format:"%02X", CPU.index_x)
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text_CPU_Y.stringValue = String(format:"%02X", CPU.index_y)
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text_CPU_IP.stringValue = String(format:"%04X", CPU.program_counter)
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text_CPU_SR.stringValue = String(format:"%02X", CPU.stack_pointer)
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}
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override func viewDidLoad() {
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super.viewDidLoad()
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debuggerTableView.delegate = self
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debuggerTableView.dataSource = self
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CPU.memoryInterface.loadBinary(path: "/Users/luigi/6502/test.bin")
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updateCPUStatusFields()
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disassembly = CPU.disassemble(fromAddress: 0x0000, length: 16)
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debuggerTableView.reloadData()
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// Do any additional setup after loading the view.
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}
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override var representedObject: Any? {
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didSet {
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// Update the view, if already loaded.
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}
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}
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func cpuStep() {
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do {
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try CPU.executeNextInstruction()
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updateCPUStatusFields()
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} catch CPUExceptions.invalidInstruction {
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print("*** 6502 Exception: Invalid instruction 0xXX at 0xXXXX")
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} catch {
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print(error)
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}
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}
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@IBAction func btn_CPUStep(_ sender: Any) {
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cpuStep()
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}
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}
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extension DebuggerViewController: NSTableViewDelegate {
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fileprivate enum CellIdentifiers {
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static let AddressCell = "AddressCellID"
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static let DataCell = "DataCellID"
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}
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func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView? {
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var cellText: String = ""
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var cellIdentifier: String = ""
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let operation = disassembly[row]
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if(tableColumn == tableView.tableColumns[0]) {
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cellText = String(format: "%04X", operation.address)
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cellIdentifier = CellIdentifiers.AddressCell
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}
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if(tableColumn == tableView.tableColumns[1]) {
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if(operation.instruction == nil) {
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cellText = "ILLEGAL"
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} else {
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switch(operation.instruction!.addressingMode) {
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case .accumulator:
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cellText = String(format: "%@ A", operation.instruction!.mnemonic)
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case .immediate:
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cellText = String(format: "%@ #%02X", operation.instruction!.mnemonic, operation.data[0])
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case .implied:
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cellText = String(format: "%@", operation.instruction!.mnemonic)
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case .relative:
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cellText = String(format: "%@ #%04X", operation.instruction!.mnemonic, UInt16(operation.data[0]) + operation.address)
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case .absolute:
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cellText = String(format: "%@ #%02X%02X", operation.instruction!.mnemonic, operation.data[1], operation.data[0])
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case .zeropage:
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cellText = String(format: "%@ $%02X", operation.instruction!.mnemonic, operation.data[0])
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case .indirect:
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cellText = String(format: "%@ ($%02X%02X)", operation.instruction!.mnemonic, operation.data[1], operation.data[0])
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case .absolute_indexed_x:
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cellText = String(format: "%@ #%02X%02X,X", operation.instruction!.mnemonic, operation.data[1], operation.data[0])
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case .absolute_indexed_y:
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cellText = String(format: "%@ #%02X%02X,Y", operation.instruction!.mnemonic, operation.data[1], operation.data[0])
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case .zeropage_indexed_x:
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cellText = String(format: "%@ $%02X,X", operation.instruction!.mnemonic, operation.data[0])
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case .zeropage_indexed_y:
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cellText = String(format: "%@ $%02X,Y", operation.instruction!.mnemonic, operation.data[0])
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case .indexed_indirect:
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cellText = String(format: "%@ ($%02X,X)", operation.instruction!.mnemonic, operation.data[0])
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case .indirect_indexed:
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cellText = String(format: "%@ ($%02X),Y", operation.instruction!.mnemonic, operation.data[0])
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}
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}
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cellIdentifier = CellIdentifiers.DataCell
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}
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if let cell = tableView.makeView(withIdentifier: NSUserInterfaceItemIdentifier(rawValue: cellIdentifier), owner: nil) as? NSTableCellView {
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cell.textField?.stringValue = cellText
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return cell
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}
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return nil
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}
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}
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extension DebuggerViewController: NSTableViewDataSource {
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func numberOfRows(in tableView: NSTableView) -> Int {
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return disassembly.count
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}
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func getItem(atIndex: Int) -> Disassembly {
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return disassembly[atIndex]
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}
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}
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