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- p_ing> Obviously, at the time of the 80486, DDR didn’t exist, so SDRAM is a natural fit.Neither are a fit, SDRAM was a Pentium/K-6 standard (PC66); the DIMMs ran faster than a non-OC'ed 486 bus, which ran at half the clock of the CPU. 486 "natural fit" would be FPM or EDO, if you wanted to be era-correct.There were probably some off the wall 486 motherboards back then that supported SDR (post-1993...), but those would have been towards the very end of the 486 consumer life cycle. These did exist in the 486 era, where they had the option to run (or had an embedded) 386 using FPM while there was an open 486 socket and the option, but not requirement to run EDO.Anyway, this is someone's project, so they can do whatever the heck they want.
- ColonelPhantomOut of curiosity, how much of the 138K LUTs (as well as other resources like BRAM) are in use here? I wonder if there's much room to add fancy peripherals, or perhaps "growing" the CPU to achieve better IPC.
- TehCorwizDoesn’t DDR just stand for Double-Data-Rate? So you implemented basic DDR on top is sdram. Not a bad approach, just wanted to point it out.
- SomeHacker44Silly question. Are there any 486-compatible small CPUs that could be embedded into a project instead of using an FPGA? Given that AMD, Intel and others have the ability to make 486-compatible processors currently, I would have thought you could just buy a CPU or SoC to run 486 code.
- hedgehogI hadn't heard of this board before, here's a link to a page on the manufacturer's site:https://classic.sipeed.com/tangconsole
- fabiensanglard486? If it has VLB, it can play DOOM well!
- rbanffyI miss Intel's Quark chips. Tiny, cheap, and Pentium enough.
- lightedmanI would love to see ancient tech fabbed out on modern processes.What's the smallest SOC you could design to run DOOM? What power envelope would that consume (exclusing display/speakers/etc.) At that size and (optimized) transistor count, what speeds could we realistically achieve?What would a massively-multicore (gpu-style with multi-hundreds or more of cores) one of these run like?Every time I see a project like this, these thoughts run through my head.
- devinbernoskyso this will run half life 2 if I'm not mistaken?
- halyconWaysI'd pay a decent price for a non-emulated 486 on a credit card sized board, or in a cute little case, with useful peripherals. Something like those Aliexpress mini pocket 386 computers, but 486 is significantly more useful for gaming.
- anonundefined
- system2When you say "credit-card-sized," I expect the thickness to be as thin as a credit card, too. Isn't the Raspberry Pi credit card sized too?