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fbf1adef05
There's still improper output in the actual machine though, so maybe something else is afoot?
73 lines
1.8 KiB
Plaintext
73 lines
1.8 KiB
Plaintext
//
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// EnterpriseNickTests.m
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// Clock SignalTests
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//
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// Created by Thomas Harte on 18/06/2021.
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// Copyright © 2021 Thomas Harte. All rights reserved.
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//
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#import <XCTest/XCTest.h>
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#include "../../../Machines/Enterprise/Nick.hpp"
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#include <memory>
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@interface EnterpriseNickTests : XCTestCase
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@end
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@implementation EnterpriseNickTests {
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std::unique_ptr<Enterprise::Nick> _nick;
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uint8_t _ram[64*1024];
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int _totalLines;
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}
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- (void)setUp {
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[super setUp];
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// Create a Nick.
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_nick = std::make_unique<Enterprise::Nick>(_ram);
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// Add a basic line table of blocks proceeding in length: 1, 2, 3, 4, etc and toggling the interrupt bit.
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_totalLines = 0;
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int nextLength = 0;
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int pointer = 0;
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uint8_t interruptFlag = 0x80;
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while(nextLength < 256) {
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_ram[pointer] = 0x100 - nextLength;
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_ram[pointer+1] = interruptFlag;
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pointer += 16;
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++nextLength;
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interruptFlag ^= 0x80;
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_totalLines += nextLength;
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}
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// For now: assume Nick starts at address 0 from creation.
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}
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- (void)testInterruptPrediction {
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// Run for the number of cycles implied by the number of lines.
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int next_sequence_point = _nick->get_next_sequence_point().as<int>();
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bool last_interrupt_line = _nick->get_interrupt_line();
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for(int c = 0; c < _totalLines*912; c++) {
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// Check that interrupt line transitions happen only on declared sequence points.
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_nick->run_for(Cycles(1));
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--next_sequence_point;
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const bool interrupt_line = _nick->get_interrupt_line();
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if(interrupt_line != last_interrupt_line) {
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XCTAssertEqual(next_sequence_point, 0);
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}
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last_interrupt_line = interrupt_line;
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if(!next_sequence_point) {
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next_sequence_point = _nick->get_next_sequence_point().as<int>();
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} else {
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const int expected_next_sequence_point = _nick->get_next_sequence_point().as<int>();
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XCTAssertEqual(next_sequence_point, expected_next_sequence_point);
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}
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}
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}
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@end
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