mirror of
https://github.com/TomHarte/CLK.git
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652 lines
16 KiB
Swift
652 lines
16 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 Z80MemptrTester: XCTestCase {
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let machine = CSTestMachineZ80()
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private func test(program : [UInt8], 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(_: 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.runForInstruction()
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return machine.value(for: .memPtr)
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}
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private func testPage(_ prefix: UInt8, exclusions: [Int]) {
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for opcode in 0 ..< 256 {
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if exclusions.contains(opcode) {
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continue
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}
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var program: [UInt8] = [
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(prefix != 0) ? prefix : UInt8(opcode), UInt8(opcode), 0, 0
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]
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let argumentPosition = (prefix != 0) ? 2 : 1
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for _ in 0 ..< 10 {
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let random = arc4random_uniform(65536)
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program[argumentPosition + 0] = UInt8(random & 0x00ff)
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program[argumentPosition + 1] = UInt8(random >> 8)
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let expectedResult = UInt16(arc4random_uniform(65536))
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let result = test(program: program, initialValue: expectedResult)
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XCTAssertEqual(result, expectedResult, "Failed for opcode \(String(opcode, radix:16))")
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// One failure per opcode will do.
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if result != expectedResult {
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break
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}
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}
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}
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}
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private 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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/// Tests that everything not listed in the documentation has no effect upon MEMPTR.
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func testStandardPageOthers() {
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testPage(0, exclusions: [
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0x02, // LD (BC), A
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0x09, // ADD HL, BC
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0x0a, // LD A, (BC)
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0x10, // DJNZ
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0x12, // LD (DE), A
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0x18, // JR
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0x19, // ADD HL, DE
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0x1a, // LD A, (DE)
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0x20, // JR NZ
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0x22, // LD (nn), HL
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0x28, // JR Z
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0x29, // ADD HL, HL
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0x2a, // LD HL, (nn)
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0x30, // JR NC
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0x32, // LD (nn), A
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0x38, // JR C
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0x39, // ADD HL, SP
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0x3a, // LD A, (nn)
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0xcb, // CB page
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0xdd, // DD page
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0xed, // ED page
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0xfd, // FD page
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])
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}
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func testEDPageOthers() {
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testPage(0xed, exclusions: [
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0x40, // IN B, (C)
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0x41, // OUT (C), B
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0x42, // SBC HL, BC
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0x43, // LD (nn), HL
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0x45, // RETN (??)
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0x48, // IN C, (C)
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0x49, // OUT (C), C
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0x4a, // ADC HL, BC
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0x4b, // LD BC, (nn)
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0x4d, // RETI
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0x50, // IN D, (C)
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0x51, // OUT (C), D
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0x52, // SBC HL, DE
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0x53, // LD (nn), DE
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0x55, // RETN (??)
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0x58, // IN E, (C)
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0x59, // OUT (C), E
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0x5a, // ADC HL, DE
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0x5b, // LD DE, (nn)
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0x5d, // RETN (??)
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0x60, // IN H, (C)
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0x61, // OUT (C), H
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0x62, // SBC HL, HL
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0x63, // LD (nn), HL
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0x65, // RETN (??)
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0x67, // RRD
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0x68, // IN L, (C)
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0x69, // OUT (C), L
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0x6a, // ADC HL, HL
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0x6b, // LD HL, (nn)
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0x6d, // RETN (??)
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0x6f, // RLD
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0x70, // IN (C)
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0x71, // OUT (C), 0
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0x72, // SBC HL, SP
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0x73, // LD (nn), SP
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0x75, // RETN (??)
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0x78, // IN A, (C)
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0x79, // OUT (C), A
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0x7a, // ADC HL, SP
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0x7b, // LD SP, (nn)
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0x7d, // RETN (??)
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0xa1, // CPI
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0xa2, // INI
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0xa3, // OUTI
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0xa9, // CPD
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0xaa, // IND
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0xab, // OUTD
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0xb0, // LDIR
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0xb1, // CPIR
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0xb2, // INIR
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0xb3, // OUIR
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0xb8, // LDDR
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0xb9, // CPDR
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0xba, // INDR
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0xbb, // OTDR
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])
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// testPage(0xcb, exclusions: [])
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// testPage(0xdd, exclusions: [])
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// testPage(0xfd, exclusions: [])
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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, 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, initialValue: 0xffff)
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let deResult = test(program: deProgram, initialValue: 0xffff)
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let nnResult = test(program: nnProgram, 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, initialValue: 0xffff)
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let deResult = test(program: deProgram, 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, initialValue: expectedResult ^ 1), expectedResult)
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XCTAssertEqual(test(program: ldnnbcEDProgram, initialValue: expectedResult ^ 1), expectedResult)
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XCTAssertEqual(test(program: ldnndeEDProgram, initialValue: expectedResult ^ 1), expectedResult)
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XCTAssertEqual(test(program: ldnnhlEDProgram, initialValue: expectedResult ^ 1), expectedResult)
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XCTAssertEqual(test(program: ldnnspEDProgram, 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, initialValue: 0xffff), expectedResult)
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XCTAssertEqual(test(program: bcEDProgram, initialValue: 0xffff), expectedResult)
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XCTAssertEqual(test(program: deEDProgram, initialValue: 0xffff), expectedResult)
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XCTAssertEqual(test(program: hlEDProgram, initialValue: 0xffff), expectedResult)
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XCTAssertEqual(test(program: spEDProgram, initialValue: 0xffff), expectedResult)
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XCTAssertEqual(test(program: ixProgram, initialValue: 0xffff), expectedResult)
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XCTAssertEqual(test(program: iyProgram, 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, initialValue: 0xffff), UInt16(addr))
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XCTAssertEqual(test(program: ixProgram, initialValue: 0xffff), UInt16(addr))
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XCTAssertEqual(test(program: iyProgram, 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, initialValue: 0xffff), expectedResult)
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XCTAssertEqual(test(program: adcProgram, initialValue: 0xffff), expectedResult)
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XCTAssertEqual(test(program: sbcProgram, 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, initialValue: 0xffff), expectedResult)
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XCTAssertEqual(test(program: rrdProgram, 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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(implemented in principle)
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*/
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func testJR() {
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var jrProgram: [UInt8] = [
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0x18, 0x00
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]
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for offset in 0 ..< 256 {
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jrProgram[1] = UInt8(offset)
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let result = test(program: jrProgram, initialValue: 0xffff)
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XCTAssertEqual(result, machine.value(for: .programCounter))
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}
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}
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func testJRcc() {
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func testJR(instruction: UInt8, shouldPass: Bool) {
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var program: [UInt8] = [
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instruction, 0x00
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]
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for offset in 0 ..< 256 {
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program[1] = UInt8(offset)
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let result = test(program: program, initialValue: 0xffff)
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XCTAssertEqual(result, shouldPass ? machine.value(for: .programCounter) : 0xffff)
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}
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}
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// JR NZ.
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machine.setValue(0x00, for: .AF)
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testJR(instruction: 0x20, shouldPass: true)
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machine.setValue(0xff, for: .AF)
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testJR(instruction: 0x20, shouldPass: false)
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// JR NC
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machine.setValue(0x00, for: .AF)
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testJR(instruction: 0x30, shouldPass: true)
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machine.setValue(0xff, for: .AF)
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testJR(instruction: 0x30, shouldPass: false)
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// JR Z
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machine.setValue(0x00, for: .AF)
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testJR(instruction: 0x28, shouldPass: false)
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machine.setValue(0xff, for: .AF)
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testJR(instruction: 0x28, shouldPass: true)
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// JR C
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machine.setValue(0x00, for: .AF)
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testJR(instruction: 0x38, shouldPass: false)
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machine.setValue(0xff, for: .AF)
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testJR(instruction: 0x38, shouldPass: true)
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}
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func testRST() {
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var rstProgram: [UInt8] = [
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0x00
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]
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for offset in 0 ..< 8 {
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rstProgram[0] = UInt8(offset << 3) + 0xc7
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let result = test(program: rstProgram, initialValue: 0xffff)
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XCTAssertEqual(result, machine.value(for: .programCounter))
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}
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}
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func testRET() {
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let retProgram: [UInt8] = [
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0xc9
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]
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for addr in 0 ..< 65536 {
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let stackContents: [UInt8] = [
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UInt8(addr & 0xff), UInt8(addr >> 8)
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]
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machine.setData(Data(stackContents), atAddress: 0xf001)
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machine.setValue(0xf000, for: .stackPointer)
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let result = test(program: retProgram, initialValue: 0xffff)
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XCTAssertEqual(result, machine.value(for: .programCounter))
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}
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}
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func testRETI() {
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let retiProgram: [UInt8] = [
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0xed, 0x4d
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]
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for addr in 0 ..< 65536 {
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let stackContents: [UInt8] = [
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UInt8(addr & 0xff), UInt8(addr >> 8)
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]
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machine.setData(Data(stackContents), atAddress: 0xf001)
|
|
machine.setValue(0xf000, for: .stackPointer)
|
|
let result = test(program: retiProgram, initialValue: 0xffff)
|
|
XCTAssertEqual(result, machine.value(for: .programCounter))
|
|
}
|
|
}
|
|
|
|
/* TODO:
|
|
JP(except JP rp)/CALL addr (even in case of conditional call/jp, independently on condition satisfied or not)
|
|
MEMPTR = addr
|
|
*/
|
|
func testCALL() {
|
|
var callProgram: [UInt8] = [
|
|
0xcd, 0x00, 0x00
|
|
]
|
|
|
|
for offset in 0 ..< 65536 {
|
|
callProgram[1] = UInt8(offset & 0xff)
|
|
callProgram[2] = UInt8(offset >> 8)
|
|
let result = test(program: callProgram, initialValue: 0xffff)
|
|
XCTAssertEqual(result, machine.value(for: .programCounter))
|
|
}
|
|
}
|
|
|
|
/* TODO:
|
|
IN A,(port)
|
|
MEMPTR = (A_before_operation << 8) + port + 1
|
|
|
|
(implemented, not tested)
|
|
*/
|
|
|
|
/* TODO:
|
|
IN A,(C)
|
|
MEMPTR = BC + 1
|
|
|
|
(implemented, not tested)
|
|
*/
|
|
|
|
/* TODO:
|
|
OUT (port),A
|
|
MEMPTR_low = (port + 1) & #FF, MEMPTR_hi = A
|
|
Note for *BM1: MEMPTR_low = (port + 1) & #FF, MEMPTR_hi = 0
|
|
*/
|
|
|
|
/* TODO:
|
|
OUT (C),A
|
|
MEMPTR = BC + 1
|
|
*/
|
|
|
|
/* TODO:
|
|
LDIR/LDDR
|
|
when BC == 1: MEMPTR is not changed
|
|
when BC <> 1: MEMPTR = PC + 1, where PC = instruction address
|
|
*/
|
|
|
|
// CPI
|
|
func testCPI() {
|
|
// MEMPTR = MEMPTR + 1
|
|
let program: [UInt8] = [
|
|
0xed, 0xa1
|
|
]
|
|
machine.setData(Data(_: program), atAddress: 0x0000)
|
|
machine.setValue(0, for: .memPtr)
|
|
|
|
for c in 1 ..< 65536 {
|
|
machine.setValue(0x0000, for: .programCounter)
|
|
machine.runForNumber(ofCycles: 16)
|
|
XCTAssertEqual(UInt16(c), machine.value(for: .memPtr))
|
|
}
|
|
}
|
|
|
|
// CPD
|
|
func testCPD() {
|
|
// MEMPTR = MEMPTR - 1
|
|
let program: [UInt8] = [
|
|
0xed, 0xa9
|
|
]
|
|
machine.setData(Data(_: program), atAddress: 0x0000)
|
|
machine.setValue(0, for: .memPtr)
|
|
|
|
for c in 1 ..< 65536 {
|
|
machine.setValue(0x0000, for: .programCounter)
|
|
machine.runForNumber(ofCycles: 16)
|
|
XCTAssertEqual(UInt16(65536 - c), machine.value(for: .memPtr))
|
|
}
|
|
}
|
|
|
|
/* TODO:
|
|
CPIR
|
|
when BC=1 or A=(HL): exactly as CPI
|
|
In other cases MEMPTR = PC + 1 on each step, where PC = instruction address.
|
|
Note* since at the last execution BC=1 or A=(HL), resulting MEMPTR = PC + 1 + 1
|
|
(if there were not interrupts during the execution)
|
|
*/
|
|
|
|
/* TODO:
|
|
CPDR
|
|
when BC=1 or A=(HL): exactly as CPD
|
|
In other cases MEMPTR = PC + 1 on each step, where PC = instruction address.
|
|
Note* since at the last execution BC=1 or A=(HL), resulting MEMPTR = PC + 1 - 1
|
|
(if there were not interrupts during the execution)
|
|
*/
|
|
|
|
/* TODO:
|
|
INI
|
|
MEMPTR = BC_before_decrementing_B + 1
|
|
*/
|
|
|
|
/* TODO:
|
|
IND
|
|
MEMPTR = BC_before_decrementing_B - 1
|
|
*/
|
|
|
|
/* TODO:
|
|
INIR
|
|
exactly as INI on each execution.
|
|
I.e. resulting MEMPTR = ((1 << 8) + C) + 1
|
|
*/
|
|
|
|
/* TODO:
|
|
INDR
|
|
exactly as IND on each execution.
|
|
I.e. resulting MEMPTR = ((1 << 8) + C) - 1
|
|
*/
|
|
|
|
/* TODO:
|
|
OUTI
|
|
MEMPTR = BC_after_decrementing_B + 1
|
|
*/
|
|
|
|
/* TODO:
|
|
OUTD
|
|
MEMPTR = BC_after_decrementing_B - 1
|
|
*/
|
|
|
|
/* TODO:
|
|
OTIR
|
|
exactly as OUTI on each execution. I.e. resulting MEMPTR = C + 1
|
|
*/
|
|
|
|
/* TODO:
|
|
OTDR
|
|
exactly as OUTD on each execution. I.e. resulting MEMPTR = C - 1
|
|
*/
|
|
|
|
/* TODO:
|
|
Any instruction with (INDEX+d):
|
|
MEMPTR = INDEX+d
|
|
*/
|
|
|
|
/* TODO:
|
|
Interrupt call to addr:
|
|
As usual CALL. I.e. MEMPTR = addr
|
|
*/
|
|
}
|