Sega Dreamcast: Difference between revisions
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The '''Sega Dreamcast''' is a home video game console released by Sega in late 1998 in Japan and worldwide in 1999. As Sega's final console, it introduced several innovations, including built-in modem support for online play and a versatile architecture aimed at both arcade and home gaming. | The '''Sega Dreamcast''' is a home video game console released by Sega in late 1998 in Japan and worldwide in 1999. As Sega's final console, it introduced several innovations, including built-in modem support for online play and a versatile architecture aimed at both arcade and home gaming. | ||
== | == Architecture and Processor == | ||
At its core, the Dreamcast is powered by a '''Hitachi SH-4''' 32-bit RISC CPU running at 200 MHz, delivering 360 MIPS and 1.4 GFLOPS. The SH-4 features a superscalar architecture with a 128-bit SIMD DSP for fast floating-point operations, making it well-suited for 3D graphics and arcade-quality games. | At its core, the Dreamcast is powered by a '''Hitachi SH-4''' 32-bit RISC CPU running at 200 MHz, delivering 360 MIPS and 1.4 GFLOPS. The SH-4 features a superscalar architecture with a 128-bit SIMD DSP for fast floating-point operations, making it well-suited for 3D graphics and arcade-quality games. | ||
The system’s graphics are handled by the '''PowerVR2 CLX2''' GPU, developed by NEC and VideoLogic, capable of hardware transform and lighting, bump mapping, anti-aliasing, and order-independent transparency. | The system’s graphics are handled by the '''PowerVR2 CLX2''' GPU, developed by NEC and VideoLogic, capable of hardware transform and lighting, bump mapping, anti-aliasing, and order-independent transparency. | ||
== | == Memory and Storage == | ||
The Dreamcast’s memory subsystem comprises: | The Dreamcast’s memory subsystem comprises: | ||
* '''16 MB 64-bit main RAM''' | * '''16 MB 64-bit main RAM''' | ||
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For storage, the Dreamcast uses proprietary '''GD-ROM''' discs (1.2 GB capacity), providing more space than standard CDs. Save data is stored on '''VMU''' (Visual Memory Unit) memory cards, each with 128 KB flash memory, which also function as mini-game devices and secondary screens. | For storage, the Dreamcast uses proprietary '''GD-ROM''' discs (1.2 GB capacity), providing more space than standard CDs. Save data is stored on '''VMU''' (Visual Memory Unit) memory cards, each with 128 KB flash memory, which also function as mini-game devices and secondary screens. | ||
== | == Display and Graphics == | ||
The graphics subsystem is built around the '''PowerVR2 CLX2''' GPU, offering: | The graphics subsystem is built around the '''PowerVR2 CLX2''' GPU, offering: | ||
* '''640×480 pixels''' maximum resolution (progressive scan) | * '''640×480 pixels''' maximum resolution (progressive scan) | ||
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The GPU can render approximately 3–5 million polygons per second in real-world scenarios, enabling arcade-quality visuals. | The GPU can render approximately 3–5 million polygons per second in real-world scenarios, enabling arcade-quality visuals. | ||
== | == Sound Capabilities == | ||
Audio is managed by the '''Yamaha AICA''' sound processor, which includes: | Audio is managed by the '''Yamaha AICA''' sound processor, which includes: | ||
* '''64 hardware channels''' (PCM/ADPCM) | * '''64 hardware channels''' (PCM/ADPCM) | ||
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This architecture allows for complex soundtracks, voice samples, and immersive sound effects. | This architecture allows for complex soundtracks, voice samples, and immersive sound effects. | ||
== | == Input/Output and Expansion == | ||
The Dreamcast features a range of I/O and expansion options: | The Dreamcast features a range of I/O and expansion options: | ||
* '''Four controller ports''' for standard controllers, light guns, arcade sticks, and other peripherals | * '''Four controller ports''' for standard controllers, light guns, arcade sticks, and other peripherals | ||
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* '''Optional peripherals''': keyboard, mouse, microphone, camera, and more | * '''Optional peripherals''': keyboard, mouse, microphone, camera, and more | ||
== | == PCB Schematics & Service Manual == | ||
<templatestyles src="Template:StyledTable/styles.css" /> | <templatestyles src="Template:StyledTable/styles.css" /> | ||
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The Dreamcast’s mainboard integrates the SH-4 CPU, PowerVR2 GPU, AICA sound processor, and RAM. The power supply board is a separate, easily replaceable module. Official service manuals and schematics are available via [[Sega Dreamcast Service Manual (PDF)]] and enthusiast resources. | The Dreamcast’s mainboard integrates the SH-4 CPU, PowerVR2 GPU, AICA sound processor, and RAM. The power supply board is a separate, easily replaceable module. Official service manuals and schematics are available via [[Sega Dreamcast Service Manual (PDF)]] and enthusiast resources. | ||
== | == Gallery == | ||
<gallery mode="packed" heights="180"> | <gallery mode="packed" heights="180"> | ||
File:Sega-dreamcast-set.png|Dreamcast console, controller, and VMU | File:Sega-dreamcast-set.png|Dreamcast console, controller, and VMU | ||
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</gallery> | </gallery> | ||
== | == Related Pages == | ||
* [[Sega Dreamcast Maintenance Guide|Sega Dreamcast General Maintenance]] | * [[Sega Dreamcast Maintenance Guide|Sega Dreamcast General Maintenance]] | ||
* [[Sega Dreamcast Troubleshooting Guide]] | * [[Sega Dreamcast Troubleshooting Guide]] | ||