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Nintendo DS
The State of 16-Bit Emulation on the DS/DSi
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<blockquote data-quote="wavemotion" data-source="post: 9552812" data-attributes="member: 543929"><p>For sure DSx86 is a 16-bit emulator. The 8086 was a true 16-bit processor and 16-bit external data bus architecture. The 8088 was the cost-reduced version used in the first Intel-based PCs and that cut back and used an 8-bit external data bus but the CPU was still 16-bits.</p><p></p><p>We tend to get hung-up on bits of the CPU but it's mostly smoke and mirrors. It's really the full architecture that has to be emulated. A CPU by itself isn't useful - it won't produce sound and it won't produce video. So you can input some numbers, run some logic and output some results... The CPU needs peripherals to work - external bus interface, memory, communication channels, sound chips, video chips, etc. All that stuff can be just as complicated to emulate - in the case of the Atari 2600 the CPU is the least of the emulation issues - the real heavy lifting comes in emulation of the RIOT (timer chip and IO chip), TIA (television interface adapter for video and sound) and the special bank-switching needed on more complicated games.</p></blockquote><p></p>
[QUOTE="wavemotion, post: 9552812, member: 543929"] For sure DSx86 is a 16-bit emulator. The 8086 was a true 16-bit processor and 16-bit external data bus architecture. The 8088 was the cost-reduced version used in the first Intel-based PCs and that cut back and used an 8-bit external data bus but the CPU was still 16-bits. We tend to get hung-up on bits of the CPU but it's mostly smoke and mirrors. It's really the full architecture that has to be emulated. A CPU by itself isn't useful - it won't produce sound and it won't produce video. So you can input some numbers, run some logic and output some results... The CPU needs peripherals to work - external bus interface, memory, communication channels, sound chips, video chips, etc. All that stuff can be just as complicated to emulate - in the case of the Atari 2600 the CPU is the least of the emulation issues - the real heavy lifting comes in emulation of the RIOT (timer chip and IO chip), TIA (television interface adapter for video and sound) and the special bank-switching needed on more complicated games. [/QUOTE]
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