4 ms·
Connomore64: Cycle exact emulation of the C64 using parallel microcontrollers
- JO_lafrite655 2y ago[flagged]
- JO_lafrite655 2y ago[flagged]
- chillingeffect 2y agoI love it. Ive been reviving a stack of 4 c64s i got untested for $285. I noticed CIA chip replacements cost 40-45 and was wondering if an Rpi pico could replace it! I'll bet they combined two CIAs into one. I'm curious if they repeat the typical 24+ pin bus (16 addr, 8 data, plus more control lines).
- croemer 2y agoDo CIA chip replacements come with a backdoor? </s>
- genewitch 2y agoYes, via the frame buffer interface pins
- robinsonb5 2y agoNot directly - you'd need level shifters to handle the 5V signals in the C64. (The RP2040 isn't "officially" 5V tolerant - there are certain circumstances where you can get away with wiring some its inputs directly to 5V logic, but those circumstances exclude bidirectional IO.)
- sunpazed 2y agoLove this! The C64 introduced me to the world of computers as a kid. I still have that almost 40 year old machine in my collection, but I’m weary of failure every time I turn it on. This is somewhat better than the MiSTer as I can use physical peripherals with it. Great work!
- Gergo 2y agoThe most common failure points in these old boxes are the capacitors and the power supply. Swap out all the caps and replace the original power supply for a modern remake and the 64 could last you another 40 years. :)
- abhisek 2y agoSo cool! Things we would do to re-live the past. Not really into hardware but I remember trying to build an emulator for z80 just to learn how it work for old Sega games
- Towaway69 2y agoCan't wait until punchcards make a comeback ;) Why isn't there an emulation of punch cards using eReaders! Completely on your side, just wondering how far back do we go?
- xobs 2y agoThere are usb-c paper tape readers: https://www.e-basteln.de/computing/papertape/overview/ https://www.e-basteln.de/computing/papertape/overview/ They even work with phones!
- Towaway69 2y agoAwesome device, it's so small you could attach to a flipper or have a builtin into the flipper. Also love their motto: "Solving yesterday's problems today" :) Now for coding doom in ticker tape ... that should fill up the rest of the afternoon!
- LargoLasskhyfv 2y agoLol :) Interestingly that same site hosts a project related to the topic of emulated 6502, but not cycle accurate, instead 100Mhz in old Spartan-6 FPGA. Unfortunately not 6510, so no plugin for the 'breadbox': https://www.e-basteln.de/computing/65f02/65f02/ https://www.e-basteln.de/computing/65f02/65f02/ & https://hackaday.com/2021/10/15/heres-a-100-mhz-pin-compatible-6502-replacement/ https://hackaday.com/2021/10/15/heres-a-100-mhz-pin-compatib... But! This reminded me of something else: Micro Core Labs! Which can either be cycle accurate, or superfast: https://microcorelabs.wordpress.com/2021/03/14/mcl64-commodore-64-accelerator/ https://microcorelabs.wordpress.com/2021/03/14/mcl64-commodo... https://microcorelabs.wordpress.com/2021/04/16/mcl64-mos-6510-emulator-works-in-commodore-64/ https://microcorelabs.wordpress.com/2021/04/16/mcl64-mos-651... https://microcorelabs.wordpress.com/2021/04/19/mcl64-worlds-fastest-commodore-64/ https://microcorelabs.wordpress.com/2021/04/19/mcl64-worlds-... https://microcorelabs.wordpress.com/2021/11/22/commodore-64-tester-using-mcl64/ https://microcorelabs.wordpress.com/2021/11/22/commodore-64-... https://microcorelabs.wordpress.com/2021/11/29/mcl64-update/ https://microcorelabs.wordpress.com/2021/11/29/mcl64-update/ Imagine Durex Forth on that. Ze PoWerRrRr!1!!
- sandos 2y agoOhh, at first I was excited to see if this mean you could just replace parts of the C64 with some nice modern building blocks: I have a very old C64 that I don't want to cannibalize for parts that has a broken clock module. But this is not quite that. :)
- rollcat 2y agoYou may be interested in this: https://www.hackster.io/news/building-a-brand-new-c64-96e803e82e7c https://www.hackster.io/news/building-a-brand-new-c64-96e803...
- rollcat 2y agoI love the sound of the SID chip, happy to find out about this project as well: https://github.com/frntc/SIDKick-pico https://github.com/frntc/SIDKick-pico 8 Bit Weapon are making some fantastic use of it: https://8bitweapon.bandcamp.com/album/disassembly-language-ambient-music-for-deprogramming-vol-1 https://8bitweapon.bandcamp.com/album/disassembly-language-a... https://8bitweapon.bandcamp.com/album/disassembly-language-ambient-music-for-deprogramming-vol-2 https://8bitweapon.bandcamp.com/album/disassembly-language-a... https://8bitweapon.bandcamp.com/album/modular-sidsation https://8bitweapon.bandcamp.com/album/modular-sidsation LukHash also regularly features C64s in his kit: https://www.youtube.com/watch?v=3JQkW6BgUYU https://www.youtube.com/watch?v=3JQkW6BgUYU Share your favourite artists!
- _the_inflator 2y agoThe best online SID Web player with access to HVSC and beyond can be find here: https://deepsid.chordian.net/ https://deepsid.chordian.net/ The host and mastermind behind this artful resource is no other than: JCH of Vibrants Enjoy and have fun playing around with the player settings as well to tweak any tune available to your liking.
- reaperducer 2y agoThe best online SID Web player with access to HVSC and beyond can be find here I prefer local. Do you know of a good macOS SID player? I'd love to drag out some of my old files.
- scodger2 2y agoThis is a painstaking software remake. It's mostly geared towards making a vst to use as a synth, but you can play old sid files using various chipsets. https://www.plogue.com/products/chipsynth-c64.html https://www.plogue.com/products/chipsynth-c64.html
- scodger2 2y agoPreviously on HN: https://news.ycombinator.com/item?id=38556261 https://news.ycombinator.com/item?id=38556261.
- eabeezxjc 2y agoI am in favor of this solution. But let it not be closed. Let's also run fuzix.org on it .
- wiz21c 2y ago> rewritten graphics rendering code (running 5-10 times as fast as the previous code while sacrificing some compatibility) argh, too bad. If one goes the cycle-accurate way, then not doing everything accurate is a bit strange... I wonder why they made that choice...
- fb03 2y agoI found that design decision a bit odd as well, as the author states multiple times that he's interested in cycle-accurate emulation. When people go for a cycle-accurate emulator, they are purposely eschewing performance for accuracy. e.g. the Higan emulator which focuses on accuracy/code readability, but it's one of the slowest SNES cores out there (and it's fine)
- chillingeffect 2y agoI took that to mean it takes less pico cpu power to reach the same cycle-accuracy. Esp since there arent graphics routines in the c64 to speak of! There are no plot, screen clear, line, etc. Every program rolls its own. As a joke a real freak could polyfill/hijack e.g $ffd2 output single char to cursor position in native pico code instead of 6502 to accel basic programs. That could be weird and phone to speed up all thise routines... but at that point just clock it all faster :)
- gitroom 2y agoLove how people still put so much effort into keeping old C64s going, makes me wanna fix up my own stash tbh.
- bitwize 2y agoI've long thought it should be possible to get timing-correct emulation by having multiple CPUs each emulate some component, rather than emulating everything on one CPU. It's cool to see this idea put into practice; the devil is always in the details.