85 lines
3.1 KiB
Swift
85 lines
3.1 KiB
Swift
//
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// AppleI.swift
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// FruitMachine
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//
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// Created by Christopher Rohl on 7/27/17.
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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 AppleI: NSObject {
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var CPU_FREQUENCY: Double
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var FRAMES_PER_SECOND: Double
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var CYCLES_PER_BATCH: Int
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static let sharedInstance = AppleI(cpuFrequency: 1000000.0, fps: 60.0)
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let cg = A1CharacterGenerator(romPath: "/Users/luigi/apple1/apple1.vid");
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let terminal = Terminal()
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let pia: [String:PIA] = [
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"keyboard": PIA(),
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"display": PIA()
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]
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let emulatorViewDelegate = AppleIBitmapDisplay()
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let emulatorView = AppleIScreenView(frame: NSMakeRect(0, 0, 640, 384))
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let emuScreenLayer = CALayer()
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required init(cpuFrequency: Double, fps: Double) {
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CPU_FREQUENCY = cpuFrequency
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FRAMES_PER_SECOND = fps
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CYCLES_PER_BATCH = Int(cpuFrequency / fps)
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super.init()
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emuScreenLayer.shouldRasterize = true
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emuScreenLayer.delegate = emulatorViewDelegate
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emuScreenLayer.frame = emulatorView.bounds
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emulatorView.wantsLayer = true
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emuScreenLayer.setNeedsDisplay()
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emulatorView.layer?.addSublayer(emuScreenLayer)
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installOverrides()
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CPU.sharedInstance.memoryInterface.loadBinary(path: "/Users/luigi/apple1/apple1.rom", offset: 0xFF00, length: 0x100)
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CPU.sharedInstance.memoryInterface.loadBinary(path: "/Users/luigi/apple1/basic.bin", offset: 0xE000, length: 0x1000)
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CPU.sharedInstance.performReset()
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}
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func installOverrides() {
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CPU.sharedInstance.memoryInterface.write_overrides.append(PIAOverrides.writeDSP)
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CPU.sharedInstance.memoryInterface.read_overrides.append(PIAOverrides.readDSP)
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CPU.sharedInstance.memoryInterface.write_overrides.append(PIAOverrides.writeDSPCR)
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CPU.sharedInstance.memoryInterface.read_overrides.append(PIAOverrides.readKBD)
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CPU.sharedInstance.memoryInterface.read_overrides.append(PIAOverrides.readKBDCR)
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}
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func runFrame() {
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CPU.sharedInstance.cycles = 0
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CPU.sharedInstance.cyclesInBatch = AppleI.sharedInstance.CYCLES_PER_BATCH
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CPU.sharedInstance.runCyclesBatch()
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//update the video display
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CVPixelBufferLockBaseAddress(emulatorViewDelegate.pixels!, CVPixelBufferLockFlags(rawValue: 0))
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let pixelBase = CVPixelBufferGetBaseAddress(emulatorViewDelegate.pixels!)
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let buf = pixelBase?.assumingMemoryBound(to: BitmapPixelsLE555.PixelData.self)
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for (cellNum, character) in terminal.characters.enumerated() {
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emulatorViewDelegate.putGlyph(buffer: buf,
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glyph: cg.glyphs[Int(cg.asciiToAppleCharIndex(ascii: character))],
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pixelPosition: emulatorViewDelegate.getPixelOffset(charCellIndex: cellNum))
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}
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CVPixelBufferUnlockBaseAddress(emulatorViewDelegate.pixels!, CVPixelBufferLockFlags(rawValue: 0))
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emulatorView.setNeedsDisplay(emulatorView.frame)
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}
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}
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