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Improves documentation.

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This commit is contained in:
Thomas Harte 2020-02-27 22:33:34 -05:00
parent 7ac0ea8529
commit 3f64cdaff8
1 changed files with 10 additions and 8 deletions
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18
OSBindings/Mac/Clock SignalTests/ZexallTests.swift
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@ -18,31 +18,32 @@ class ZexallTests: XCTestCase, CSTestMachineTrapHandler {
if let filename = Bundle(for: type(of: self)).path(forResource: name, ofType: "com") {
if let testData = try? Data(contentsOf: URL(fileURLWithPath: filename)) {
// install test program, at the usual CP/M place
// Install test program, at the usual CP/M place.
let machine = CSTestMachineZ80()
machine.setData(testData, atAddress: 0x0100)
// add a RET at the CP/M entry location, and establish it as a trap location
// Add a RET at the CP/M entry location, set a high memtop, and
// and establish the entry location as a trap location.
machine.setValue(0xc9, atAddress: 0x0005)
machine.setValue(0xff, atAddress: 0x0006)
machine.setValue(0xff, atAddress: 0x0007)
machine.addTrapAddress(0x0005);
machine.trapHandler = self
// establish 0 as another trap location, as RST 0h is one of the ways that
// CP/M programs can exit
// Establish 0 as another trap location, as RST 0h is one of the ways that
// CP/M programs can exit.
machine.addTrapAddress(0);
// ensure that if the CPU hits zero, it stays there until the end of the
// sampling window
// Ensure that if the CPU hits zero, it stays there until the end of the
// sampling window.
machine.setValue(0xc3, atAddress: 0x0000)
machine.setValue(0x00, atAddress: 0x0001)
machine.setValue(0x00, atAddress: 0x0002)
// seed execution at 0x0100
// Seed execution at 0x0100.
machine.setValue(0x0100, for: .programCounter)
// run!
// Run!
let cyclesPerIteration: Int32 = 400_000_000
var cyclesToDate: TimeInterval = 0
let startDate = Date()
@ -144,6 +145,7 @@ class ZexallTests: XCTestCase, CSTestMachineTrapHandler {
let testMachineZ80 = testMachine as! CSTestMachineZ80
switch address {
case 0x0005:
// Only the output text CP/M calls are implemented.
let cRegister = testMachineZ80.value(for: .C)
var textToAppend = ""
switch cRegister {