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- P A N A S O N I C 3 D O
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- 32-BIT RISC PROCESSOR
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- The RISC (Reduced Instruction Set Computer) Central Processing Unit used
- in the 3DO is called the ARM6 and has also been used in the Acorn
- Archimedes home computer. While the clock speed doesn't sound much at
- 12.5Mhz, it's a true 32-bit chip and it will execute most instructions
- in one, sometimes two cycles. For a speed comparison, the ARM6 in the
- 3DO is roughly equivalent to an Intel 486 running at 33Mhz. Pretty dame
- fast. There are some differences. For a start, a 486's speed is
- hindered by things the 3DO just won't have to think about.
-
- Things like a RAM cache, segment architecture, and having to run Intel's
- 8088-compatibility code-all these have to be factored into speed. 3DO's
- RISC architecture allows it to streamline a lot of the things a 486 or
- any other Industry Standard Architecture (ISA)-based processor is
- burdened with.
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- ANIMATION PROCESSORS
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- The key to the system's high-performance architecture is a specialised
- pair of animation engines, that can, its claimed, display or move up to
- 64 million pixels per second. That's compared to the mere one million
- pixels per second of average 16bit systems, and the three million
- pixels per second average of 32bit systems. These engines organise the
- graphics into `animation cells' similar to the graphics engine in the
- Atari Lynx.
-
- 3DO's animation cells are high resolution, full color images, that can
- be moved, scaled, rotated, warped, texture-mapped, lightsourced and
- even made transparent with the aid of 3DO's Cinematic Software Tools.
- These cell engines draw the images while the RISC CPU calculates where
- the images are going. For pure polygon generation as seen in games
- like STARFOX, and texture-mapped 3D as in thngs like FORGOTTEN CASTLE,
- 3DO is exceptionally fast.
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- DMA ENGINE
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- One of 3DO's strongest features is its DMA engine. Direct Memory Access
- enables the system to shift around huge chunks of data within its three
- meagbytes of memory without using the CPU. And 3DO can do it faster than
- 16bit technology.
-
- If you're doing `normal' DMA, 3DO can move about six megabytes a second
- compare to the 2.6 megabytes a second on 16bit, such as the SNES-two
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- VIDEO DISPLAY
-
- Now this is really misleading. On paper, 3DO claims that the system is
- capable of a resolution of 640x480 pixels. This just isn't true. 3DO
- only has a 320x240 video memory, not 640x480, but its capable of looking
- like a 640x480. The hardware cheats by comparing adjacent pixels and
- producing a new, intermediate pixel (horizontally and vertically) by
- averaging the two colors. If you have a black and white pixel next
- to one another, the new pixel would be grey.
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- Finally, the 3DO system also has the ability to take two seperate
- pictures and fully interleave them to give stereo imaging for 3D glasses.
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