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- Hacker News
- Well I've played the 6502 simulator as a kind on my 6502 Apple ][ clone :) :) :)
youtube.com/watch?si=XuNgnVc4rf86nIgA&t=42
it should'be available here to play online too (but haven't tried it)
https://archive.org/details/257_Educational_Software_The_650...
by malkia - The emulator on that page gets an error when booting, but I think the content is the same as this:
https://archive.org/details/riag_004_051_-_MECC_Assembly_Lan...
Which was awesome as a kid to finally see what was "going on" inside there.
by wang_li - I wish these guys would have released this amazing looking 6502 in circuits: https://www.evilmadscientist.com/2016/6502/by timmg
- Agree. I would pay for it.by SomeHacker44
- Shameless plug: I wrote a 'remix' a couple of years ago over a Christmas break using WASM+WebGL+DearImGui with better rendering performance, integrated assembler and a couple visualization tools (using the visual6502 team's original reverse engineered netlist data, and https://github.com/mist64/perfect6502 as simulation loop):
- 6502: https://floooh.github.io/visual6502remix/
- Z80: https://floooh.github.io/visualz80remix/
- 2A03 (this was contributed): https://floooh.github.io/visual2a03remix/
- source code: https://github.com/floooh/v6502r
(the simulation generally runs throttled to 1 half-clock-cycle per frame, so don't use it as any sort of benchmark)
by flohofwoe - The link to Perfect6502 is interesting. It says that it supposedly gets speeds of 1/30th of 1MHz - i.e. ~30KHz - on high-end 2025 CPUs. Which is very slow of course, but still ~1000x faster than what people are reporting in this thread.
Of course it's in JS rather than C, but V8 is really good, well within an order of magnitude - not three - of native, at least with well-written code. I profiled the original Visual6502 and at a glance it sure does look like it's losing a ton of performance to rendering (so good call there).
I have to wonder what the limit is. Even Perfect6502 looks like it's all single-threaded and CPU-driven, which really isn't making the most of modern machines. But I don't know if this is a task that could be efficiently split across cores or dispatched to the GPU (and I can't even begin to know whether SIMD might be useful); of course hardware itself is fundamentally parallel, but the synchronization might kill you?
by wk_end - It is a fun way to benchmark your system. I managed to get 4.1hz on my 13th gen i5 work laptop.
Let's see an M-series chip blow that out of the water. ;)
EDIT - It was 4.1Hz in advance mode. Actually runs at between 22Hz and 44hz depending on each time I run it. Odd to have such a wide performance variation. I will just blame Windows and some power management setting/thermal throttling.
by ColdStream - 88Hz on the M4 Proby va3ndf
- High 60's to 70 on a Firefox|Fedora|Ryzen AI 9 HX.by phs318u
- 70hz to 75hz on 12th Gen Core i7-12700
Get about 10 more hz in Firefox than in Chrome which was unexpected.
by wvenable - I'm seeing 34 Hz on a Ryzen 7 3600X 3.6 Ghz with Chrome. 47 Hz in Firefox.by djmips
- I got 22-33Hz on an AMD Ryzen 7640U on power-save mode and 50-55Hz on performance mode.by AnnikaL
- Linux, Core i7-8700, Firefox, GTX1650, nothing special, and I'm getting 45-55Hz out of it.
So you're probably not far off. I can't imagine more modern chips than mine would run it significantly faster, none of the "tweaks" would help here.
- My very old i5-3570K on Firefox 153 is running this at 17.5Hz. I'm not sure why a much newer chip would be dramatically slower.by jandrese
- M4 Max, Brave — 93Hz highest, usually around 90Hz. On Advanced it started at 22Hz & steadily dropped from there into the single digits as it ran. Safari held around 62.xHz. On Advanced it started at 40Hz & also kept dropping.by flenserboy
- https://github.com/iaddis/metalnes
Similar project, gate level emulation of NES CPU+PPU by the Nesticle author Icer Addis.
An entire world in a scanline