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108 lines
2.3 KiB
Plaintext
108 lines
2.3 KiB
Plaintext
//
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// 65816ComparativeTests.m
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// Clock SignalTests
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//
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// Created by Thomas Harte on 18/06/2022.
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// Copyright © 2022 Thomas Harte. All rights reserved.
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//
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#include "65816.hpp"
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#import <XCTest/XCTest.h>
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#include <array>
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#include <vector>
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#include <unordered_map>
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namespace {
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struct BusHandler: public CPU::MOS6502Esque::BusHandler<uint32_t> {
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// Use a map to store RAM contents, in order to preserve initialised state.
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std::unordered_map<uint32_t, uint8_t> ram;
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Cycles perform_bus_operation(CPU::MOS6502Esque::BusOperation operation, uint32_t address, uint8_t *value) {
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// Record the basics of the operation.
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auto &cycle = cycles.emplace_back();
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cycle.address = address;
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cycle.operation = operation;
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cycle.value = 0xff;
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// Perform the operation, and fill in the cycle's value.
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using BusOperation = CPU::MOS6502Esque::BusOperation;
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auto ram_value = ram.find(address);
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switch(operation) {
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case BusOperation::ReadOpcode:
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++opcodes_fetched_;
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case BusOperation::Read:
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case BusOperation::ReadProgram:
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case BusOperation::ReadVector:
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if(ram_value != ram.end()) {
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cycle.value = *value = ram_value->second;
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} else {
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cycle.value = *value = uint8_t(rand() >> 8);
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ram[address] = cycle.value;
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}
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break;
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case BusOperation::Write:
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cycle.value = ram[address] = *value;
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break;
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default: break;
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}
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// Don't occupy any bonus time.
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return Cycles(1);
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}
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int opcodes_fetched_ = 0;
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struct Cycle {
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CPU::MOS6502Esque::BusOperation operation;
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uint32_t address;
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uint8_t value;
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};
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std::vector<Cycle> cycles;
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};
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}
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// MARK: - New test generator.
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@interface TestGenerator : NSObject
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@end
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@implementation TestGenerator
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- (void)generate {
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BusHandler handler;
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CPU::WDC65816::Processor<BusHandler, false> processor(handler);
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for(int operation = 0; operation < 512; operation++) {
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const bool is_emulated = operation & 256;
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const uint8_t opcode = operation & 255;
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// TODO: set up for opcode and emulation mode.
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// TODO: run for a bit longer than this, of course.
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processor.run_for(Cycles(1));
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}
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printf("");
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}
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@end
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// MARK: - Existing test evaluator.
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@interface WDC65816ComparativeTests : XCTestCase
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@end
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@implementation WDC65816ComparativeTests
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// A generator for tests; not intended to be a permanent fixture.
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- (void)testGenerate {
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[[[TestGenerator alloc] init] generate];
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}
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@end
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