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61 lines
1.6 KiB
Plaintext
61 lines
1.6 KiB
Plaintext
//
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// MasterSystemVDPTests.m
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// Clock SignalTests
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//
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// Created by Thomas Harte on 09/10/2018.
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// Copyright © 2018 Thomas Harte. All rights reserved.
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//
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#import <XCTest/XCTest.h>
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#include "../../../Machines/Atari/ST/Video.hpp"
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@interface AtariSTVideoTests : XCTestCase
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@end
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@implementation AtariSTVideoTests
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- (void)setUp {
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[super setUp];
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}
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- (void)tearDown {
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[super tearDown];
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}
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- (void)testSequencePoints {
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// Establish an instance of video.
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Atari::ST::Video video;
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uint16_t ram[256*1024];
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video.set_ram(ram, sizeof(ram));
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// Set 4bpp, 50Hz.
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video.write(0x05, 0x0200);
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video.write(0x30, 0x0000);
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// Run for [more than] a whole frame making sure that no observeable outputs
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// change at any time other than a sequence point.
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HalfCycles next_event;
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bool display_enable = false;
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bool vsync = false;
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bool hsync = false;
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for(size_t c = 0; c < 10 * 1000 * 1000; ++c) {
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const bool is_transition_point = next_event == HalfCycles(0);
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if(is_transition_point) {
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display_enable = video.display_enabled();
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vsync = video.vsync();
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hsync = video.hsync();
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next_event = video.get_next_sequence_point();
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} else {
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NSAssert(display_enable == video.display_enabled(), @"Unannounced change in display enabled at cycle %zu [%d before next sequence point]", c, next_event.as<int>());
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NSAssert(vsync == video.vsync(), @"Unannounced change in vsync at cycle %zu [%d before next sequence point]", c, next_event.as<int>());
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NSAssert(hsync == video.hsync(), @"Unannounced change in hsync at cycle %zu [%d before next sequence point]", c, next_event.as<int>());
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}
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video.run_for(HalfCycles(2));
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next_event -= HalfCycles(2);
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}
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}
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@end
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