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https://github.com/TomHarte/CLK.git
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413 lines
11 KiB
Swift
413 lines
11 KiB
Swift
//
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// Z80MemptrTests.swift
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// Clock Signal
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//
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// Created by Thomas Harte on 21/07/2017.
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// Copyright 2017 Thomas Harte. All rights reserved.
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//
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import XCTest
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class Z80MemptrTests: XCTestCase {
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private let machine = CSTestMachineZ80()
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private func test(program : [UInt8], length : Int32, initialValue : UInt16) -> UInt16 {
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// Create a machine and install the supplied program at address 0, setting the PC to run from there
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machine.setValue(0x0000, for: .programCounter)
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machine.setData(Data(bytes: program), atAddress: 0x0000)
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// Set the initial value of memptr, run for the requested number of cycles,
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// return the new value
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machine.setValue(initialValue, for: .memPtr)
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machine.runForNumber(ofCycles: length)
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return machine.value(for: .memPtr)
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}
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fileprivate func insert16(program: inout [UInt8], address: Int, offset: size_t) {
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program[offset] = UInt8(address & 0x00ff)
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program[offset + 1] = UInt8(address >> 8)
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}
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/*
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Re: comments below:
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All the CPU chips tested give the same results except KP1858BM1 and T34BM1 slices noted as "BM1".
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*/
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// LD A, (addr)
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func testLDAnn() {
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// MEMPTR = addr+1
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var program: [UInt8] = [
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0x3a, 0x00, 0x00
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]
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for addr in 0 ..< 65536 {
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program[1] = UInt8(addr & 0x00ff)
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program[2] = UInt8(addr >> 8)
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let expectedResult = UInt16((addr + 1) & 0xffff)
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let result = test(program: program, length: 13, initialValue: 0xffff)
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XCTAssertEqual(result, expectedResult)
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}
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}
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// LD (bc/de),A, and LD (nn),A
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func testLDrpA() {
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// MEMPTR_low = (addr + 1) & #FF, MEMPTR_hi = A
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// Note for *BM1: MEMPTR_low = (addr + 1) & #FF, MEMPTR_hi = 0
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let bcProgram: [UInt8] = [
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0x02
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]
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let deProgram: [UInt8] = [
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0x12
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]
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var nnProgram: [UInt8] = [
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0x32, 0x00, 0x00
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]
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for addr in 0 ..< 256 {
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machine.setValue(UInt16(addr), for: .BC)
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machine.setValue(UInt16(addr), for: .DE)
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insert16(program: &nnProgram, address: addr, offset: 1)
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for a in 0 ..< 256 {
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machine.setValue(UInt16(a), for: .A)
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let expectedResult = UInt16(((addr + 1) & 0xff) + (a << 8))
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let bcResult = test(program: bcProgram, length: 7, initialValue: 0xffff)
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let deResult = test(program: deProgram, length: 7, initialValue: 0xffff)
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let nnResult = test(program: nnProgram, length: 13, initialValue: 0xffff)
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XCTAssertEqual(bcResult, expectedResult)
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XCTAssertEqual(deResult, expectedResult)
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XCTAssertEqual(nnResult, expectedResult)
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}
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}
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}
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// LD A, (rp)
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func testLDArp() {
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// MEMPTR = rp+1
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let bcProgram: [UInt8] = [
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0x0a
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]
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let deProgram: [UInt8] = [
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0x1a
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]
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for addr in 0 ..< 65536 {
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machine.setValue(UInt16(addr), for: .BC)
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machine.setValue(UInt16(addr), for: .DE)
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let expectedResult = UInt16((addr + 1) & 0xffff)
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let bcResult = test(program: bcProgram, length: 7, initialValue: 0xffff)
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let deResult = test(program: deProgram, length: 7, initialValue: 0xffff)
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XCTAssertEqual(bcResult, expectedResult)
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XCTAssertEqual(deResult, expectedResult)
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}
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}
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// LD (addr), rp
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func testLDnnrp() {
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// MEMPTR = addr + 1
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var ldnnhlBaseProgram: [UInt8] = [
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0x22, 0x00, 0x00
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]
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var ldnnbcEDProgram: [UInt8] = [
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0xed, 0x43, 0x00, 0x00
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]
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var ldnndeEDProgram: [UInt8] = [
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0xed, 0x53, 0x00, 0x00
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]
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var ldnnhlEDProgram: [UInt8] = [
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0xed, 0x63, 0x00, 0x00
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]
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var ldnnspEDProgram: [UInt8] = [
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0xed, 0x73, 0x00, 0x00
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]
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for addr in 0 ..< 65536 {
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insert16(program: &ldnnhlBaseProgram, address: addr, offset: 1)
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insert16(program: &ldnnbcEDProgram, address: addr, offset: 2)
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insert16(program: &ldnndeEDProgram, address: addr, offset: 2)
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insert16(program: &ldnnhlEDProgram, address: addr, offset: 2)
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insert16(program: &ldnnspEDProgram, address: addr, offset: 2)
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let expectedResult = UInt16((addr + 1) & 0xffff)
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XCTAssertEqual(test(program: ldnnhlBaseProgram, length: 16, initialValue: expectedResult ^ 1), expectedResult)
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XCTAssertEqual(test(program: ldnnbcEDProgram, length: 20, initialValue: expectedResult ^ 1), expectedResult)
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XCTAssertEqual(test(program: ldnndeEDProgram, length: 20, initialValue: expectedResult ^ 1), expectedResult)
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XCTAssertEqual(test(program: ldnnhlEDProgram, length: 20, initialValue: expectedResult ^ 1), expectedResult)
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XCTAssertEqual(test(program: ldnnspEDProgram, length: 20, initialValue: expectedResult ^ 1), expectedResult)
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}
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}
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// LD rp, (addr)
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func testLDrpnn() {
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// MEMPTR = addr+1
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var hlBaseProgram: [UInt8] = [
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0x22, 0x00, 0x00
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]
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var bcEDProgram: [UInt8] = [
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0xed, 0x43, 0x00, 0x00
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]
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var deEDProgram: [UInt8] = [
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0xed, 0x53, 0x00, 0x00
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]
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var hlEDProgram: [UInt8] = [
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0xed, 0x63, 0x00, 0x00
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]
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var spEDProgram: [UInt8] = [
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0xed, 0x73, 0x00, 0x00
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]
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var ixProgram: [UInt8] = [
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0xdd, 0x22, 0x00, 0x00
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]
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var iyProgram: [UInt8] = [
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0xfd, 0x22, 0x00, 0x00
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]
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for addr in 0 ..< 65536 {
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hlBaseProgram[1] = UInt8(addr & 0x00ff)
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hlBaseProgram[2] = UInt8(addr >> 8)
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bcEDProgram[2] = UInt8(addr & 0x00ff)
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bcEDProgram[3] = UInt8(addr >> 8)
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deEDProgram[2] = UInt8(addr & 0x00ff)
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deEDProgram[3] = UInt8(addr >> 8)
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hlEDProgram[2] = UInt8(addr & 0x00ff)
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hlEDProgram[3] = UInt8(addr >> 8)
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spEDProgram[2] = UInt8(addr & 0x00ff)
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spEDProgram[3] = UInt8(addr >> 8)
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ixProgram[2] = UInt8(addr & 0x00ff)
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ixProgram[3] = UInt8(addr >> 8)
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iyProgram[2] = UInt8(addr & 0x00ff)
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iyProgram[3] = UInt8(addr >> 8)
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let expectedResult = UInt16((addr + 1) & 0xffff)
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XCTAssertEqual(test(program: hlBaseProgram, length: 16, initialValue: 0xffff), expectedResult)
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XCTAssertEqual(test(program: bcEDProgram, length: 20, initialValue: 0xffff), expectedResult)
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XCTAssertEqual(test(program: deEDProgram, length: 20, initialValue: 0xffff), expectedResult)
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XCTAssertEqual(test(program: hlEDProgram, length: 20, initialValue: 0xffff), expectedResult)
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XCTAssertEqual(test(program: spEDProgram, length: 20, initialValue: 0xffff), expectedResult)
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XCTAssertEqual(test(program: ixProgram, length: 20, initialValue: 0xffff), expectedResult)
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XCTAssertEqual(test(program: iyProgram, length: 20, initialValue: 0xffff), expectedResult)
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}
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}
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// EX (SP), rp
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func testEXSPrp() {
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// MEMPTR = rp at end
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var hlProgram: [UInt8] = [
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0xe3, 0x00, 0x00, 0x00
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]
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var ixProgram: [UInt8] = [
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0xdd, 0xe3, 0x00, 0x00
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]
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var iyProgram: [UInt8] = [
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0xfd, 0xe3, 0x00, 0x00
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]
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machine.setValue(2, for: .stackPointer)
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for addr in 0 ..< 65536 {
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hlProgram[2] = UInt8(addr & 0x00ff)
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hlProgram[3] = UInt8(addr >> 8)
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ixProgram[2] = UInt8(addr & 0x00ff)
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ixProgram[3] = UInt8(addr >> 8)
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iyProgram[2] = UInt8(addr & 0x00ff)
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iyProgram[3] = UInt8(addr >> 8)
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XCTAssertEqual(test(program: hlProgram, length: 19, initialValue: 0xffff), UInt16(addr))
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XCTAssertEqual(test(program: ixProgram, length: 23, initialValue: 0xffff), UInt16(addr))
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XCTAssertEqual(test(program: iyProgram, length: 23, initialValue: 0xffff), UInt16(addr))
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}
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}
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// ADD/ADC/SBC dest, src
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func testADDADCSBCrr() {
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// MEMPTR = dest prior to modification + 1
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let addProgram: [UInt8] = [
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0x09
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]
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let adcProgram: [UInt8] = [
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0xed, 0x4a
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]
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let sbcProgram: [UInt8] = [
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0xed, 0x42
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]
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for addr in 0 ..< 65536 {
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let expectedResult = UInt16((addr + 1) & 0xffff)
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machine.setValue(UInt16(addr), for: .HL)
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XCTAssertEqual(test(program: addProgram, length: 11, initialValue: 0xffff), expectedResult)
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XCTAssertEqual(test(program: adcProgram, length: 15, initialValue: 0xffff), expectedResult)
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XCTAssertEqual(test(program: sbcProgram, length: 15, initialValue: 0xffff), expectedResult)
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}
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}
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// RLD/RRD
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func testRLDRRD() {
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// MEMPTR = HL + 1
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let rldProgram: [UInt8] = [
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0xed, 0x6f
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]
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let rrdProgram: [UInt8] = [
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0xed, 0x67
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]
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for addr in 0 ..< 65536 {
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let expectedResult = UInt16((addr + 1) & 0xffff)
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machine.setValue(UInt16(addr), for: .HL)
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XCTAssertEqual(test(program: rldProgram, length: 18, initialValue: 0xffff), expectedResult)
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XCTAssertEqual(test(program: rrdProgram, length: 18, initialValue: 0xffff), expectedResult)
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}
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}
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/* TODO:
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JR/DJNZ/RET/RETI/RST (jumping to addr)
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MEMPTR = addr
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*/
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/* TODO:
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JP(except JP rp)/CALL addr (even in case of conditional call/jp, independantly on condition satisfied or not)
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MEMPTR = addr
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*/
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/* TODO:
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IN A,(port)
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MEMPTR = (A_before_operation << 8) + port + 1
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*/
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/* TODO:
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IN A,(C)
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MEMPTR = BC + 1
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*/
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/* TODO:
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OUT (port),A
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MEMPTR_low = (port + 1) & #FF, MEMPTR_hi = A
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Note for *BM1: MEMPTR_low = (port + 1) & #FF, MEMPTR_hi = 0
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*/
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/* TODO:
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OUT (C),A
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MEMPTR = BC + 1
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*/
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/* TODO:
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LDIR/LDDR
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when BC == 1: MEMPTR is not changed
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when BC <> 1: MEMPTR = PC + 1, where PC = instruction address
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*/
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// CPI
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func testCPI() {
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// MEMPTR = MEMPTR + 1
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let program: [UInt8] = [
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0xed, 0xa1
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]
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machine.setData(Data(bytes: program), atAddress: 0x0000)
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machine.setValue(0, for: .memPtr)
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for c in 1 ..< 65536 {
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machine.setValue(0x0000, for: .programCounter)
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machine.runForNumber(ofCycles: 16)
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XCTAssertEqual(UInt16(c), machine.value(for: .memPtr))
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}
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}
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// CPD
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func testCPD() {
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// MEMPTR = MEMPTR - 1
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let program: [UInt8] = [
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0xed, 0xa9
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]
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machine.setData(Data(bytes: program), atAddress: 0x0000)
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machine.setValue(0, for: .memPtr)
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for c in 1 ..< 65536 {
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machine.setValue(0x0000, for: .programCounter)
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machine.runForNumber(ofCycles: 16)
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XCTAssertEqual(UInt16(65536 - c), machine.value(for: .memPtr))
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}
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}
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/* TODO:
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CPIR
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when BC=1 or A=(HL): exactly as CPI
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In other cases MEMPTR = PC + 1 on each step, where PC = instruction address.
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Note* since at the last execution BC=1 or A=(HL), resulting MEMPTR = PC + 1 + 1
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(if there were not interrupts during the execution)
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*/
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/* TODO:
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CPDR
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when BC=1 or A=(HL): exactly as CPD
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In other cases MEMPTR = PC + 1 on each step, where PC = instruction address.
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Note* since at the last execution BC=1 or A=(HL), resulting MEMPTR = PC + 1 - 1
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(if there were not interrupts during the execution)
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*/
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/* TODO:
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INI
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MEMPTR = BC_before_decrementing_B + 1
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*/
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/* TODO:
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IND
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MEMPTR = BC_before_decrementing_B - 1
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*/
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/* TODO:
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INIR
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exactly as INI on each execution.
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I.e. resulting MEMPTR = ((1 << 8) + C) + 1
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*/
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/* TODO:
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INDR
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exactly as IND on each execution.
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I.e. resulting MEMPTR = ((1 << 8) + C) - 1
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*/
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/* TODO:
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OUTI
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MEMPTR = BC_after_decrementing_B + 1
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*/
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/* TODO:
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OUTD
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MEMPTR = BC_after_decrementing_B - 1
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*/
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/* TODO:
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OTIR
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exactly as OUTI on each execution. I.e. resulting MEMPTR = C + 1
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*/
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/* TODO:
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OTDR
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exactly as OUTD on each execution. I.e. resulting MEMPTR = C - 1
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*/
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/* TODO:
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Any instruction with (INDEX+d):
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MEMPTR = INDEX+d
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*/
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/* TODO:
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Interrupt call to addr:
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As usual CALL. I.e. MEMPTR = addr
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*/
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}
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