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So, as others have said, if you're looking for a light way to ramp up your programming ability then jumping into a full machine emulator may not be the thing.
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That can be a further burden because even once you are certain that you know what your code is doing, that reduces your ability to be certain that it is necessarily doing the right thing.
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In the case of the PC Engine/etc you might also find that there's a bit of a documentation deficit, at least at the really-accurate level. Things like video chips tend to be slightly more tractable because they have fixed functionality and therefore are more straightforward to express and easier to trace, but once you have the totality of the machine implemented you'll be in the realm of debugging bad interactions between the various distinct parts, which can be much harder to trace. You should then expect that level of effort by two or three to fill in the rest of the machine. This is where a lot of '90s emulators used to get into the weeds, having been forced to make approximations to fit a processing budget and then trying to contort those approximations to maximise compatibility.
#TURBO DUO EMULATOR MAC HOW TO#
All the other chips need implementations, and you may have to make more judgment calls on how to smooth off fragile corners for some titles if you've opted for a less accurate implementation. Though the final one is largely a solved problem for machines of that vintage thanks to the advances of time.Įven once that's working you're only a fraction of the way there. You'll also have to make a judgment call on how accurate you want your implementation to be, which will be a function of the language you pick, the amount of time you want to invest and the level of performance you're aiming for. It's not really 256 independent pieces of knowledge, it's more like a dozen or so orthogonal pieces of knowledge - what the addressing modes are, what the operations are, what processor state there is, how interrupts are handled, etc - but you'll need to replicate all of it, so you'll need to understand all of it. So you're going to need to understand what each of those does. It's related to the 6502, which is relatively simple, having only 256 possible different instruction codes.
So task one is: understand what a CPU is, what it does, and read up on the one specific to that machine. Therefore a vanilla approach to emulation will be to interpret CPU instructions and issue data to or request it from the other parts of the system - the video chip, the audio chip, etc - as and when the CPU needs it.
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To explain what would be involved, so that you can persuade or dissuade yourself:Ī machine of that vintage has a single, slow processor and software for it was written directly at the machine level. I'd assume that the Turbograxf 16 and the PC Engine aren't that complex of computers. The only way and definitive way of playing Turbograxf 16 and PC Engine games is on Retropie, but that cost a few hundred dollars, and not everyone has that money, so yeah that's my reasoning also the game are good. Turbo Engine is now only a place to check if your ROM and ISO are in working order it's not something you'd play Turbografx 16 and PC Engine games on in 2020. One of them is called "Turbo Engine" it's extremely outdated, therefore for the majority of people there's no way of playing any of these games. There's only two Turbograxf-16 and PC Engine emulators. I'm not a beginner I know "OF" this stuff, but I've never put anything into practice.
This is only an idea I'm not set on making one, but it would be nice to make one. Plus even if I did own those computers I do not have the tools to do so let alone the knowledge. I have in interest in making an Emulator for all things Turbograxf 16 and PC Engine related, however my programing knowledge is bad, and I don't own any of those computers expect for a Turbografx 16, so there's no way to study the architecture.
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