![]() One day, WDC got approached by Apple to design a backwards-compatible variant of the 6502 that could process larger amounts of data. In 1978, one year after leaving MOS, Mensch founded Western Design Center (WDC), a semiconductor company that ships clones of the MOS 6502 with attractive enhancements (i.e CMOS design, extra opcodes, circuitry fixes, new addressing modes, etc). The 65C816 CPU originates at Western Design Center, particularly from Bill Mensch, a former member of the 6502 team at MOS and, before that, part of the 6800 team at Motorola. Now, to pave way for the new decade (the 90s), Nintendo went for a more conservative (and cheaper) solution: the 65C816, a 16-bit extension of the 6502. To recap, the NES employed a modified 6502 CPU, an admired ingredient of late-70s and early-80s computers. Unlike its competition bundling a fully-fledged 68000, the SNES’ chip is not a radical break from its predecessor. The Super Nintendo’s choice of processor is a peculiar one. In a world where CPUs are evolving faster than the speed of light, Nintendo ultimately depended on game cartridges to make its console shine. But there’s a catch: the new console was also designed with expandability in mind. It seems Nintendo managed to bring the next generation of graphics and sounds without using expensive off-the-shelf components. ![]() Motherboard with important parts labelled Diagram Main architecture diagramīus 'A' and 'B' are address buses, the data bus follows the trail of bus 'B' and it's 8 bits wide. The profits contribute towards the improvement of current articles and the development of future ones.įor more information, please take a look at here.Įarlier revisions had the Sound Subsystem connected as a daughterboard, later ones unified both PPUs. You can find the eBook at Amazon Kindle, Apple Books, Kobo and other stores. Furthermore, it's updated at the same pace as the website. ![]() The new edition is DRM-free and can be read whilst offline. This article is also published on many digital book stores for the benefit of eBook readers. ![]()
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