The C64 was probably the pinnacle of 8 bit home computers. That's something that didn't really happen with the Amiga until emulators started to make it easier, although some people came close.
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People reverse engineered it completely, understanding the internal workings of the video chip and being able to write code that made full use of every available memory access slot. The Amiga took this to another level, but the C64 was better understood at an earlier stage. The video hardware was also very hackable, with all sorts of tricks possible to produce effects that were way beyond what the designers imagined. Posted: Tue 2:54 am Post subject: new: javaSCRIPT C64 emulator A dutchguy came up with a javaSCRIPT C64 emulator, a port of FC64, look at link. For example, "speed code" is where instead of storing data separately in RAM it's directly inserted into the machine code instructions as immediate operands. Compilers were expensive and almost exclusively had to run on more powerful machines for cross-compilation, so most software was written in BASIC or assembler.Īll sorts of tricks were developed to make the most of this limited CPU power. It had a few tricks like the zero page, which gave it 256 fairly fast register-like bytes of RAM to play with. But it had to share the memory bus with the video chip, so it couldn't make use of every cycle, and of course there were no caches or anything like that. An interesting bit of trivia, the C64 was where the iconic "fake chord" was invented, where two or three notes are played in quick succession on a single channel to make up for the lack of greater polyphony.
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Musicians were coders as well, and of course as well as figuring out how to make the chip produce those sounds they had to fit it all within the limited memory and CPU power available. The sound chip, for example, could produce some amazing output but had to be programmed directly. You can see this by comparing early and late C64 games the difference is incredible, you wouldn't think they were the same machine. The hardware was powerful but needed a lot of skill to get the most from. Vice does support SDL1 but porting was not quite as easy as 'just compile': A new sounddriver for the 3DS needed to be written. The C64 is one of the most interesting machines ever made. spinalcord made a C64 emulator (Breadbox) based on Frodo but it does not work anymore with recent firmwares and he is not updating it anymore, so I gave it a shot to port the Vice C64 emulator v3.3 to the 3DS.
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