Rust on 6502: Gareth Poole Shows LLVM-MOS for the C64
#Rust #MOS6502 #Commodore64 #LLVM #RetroComputing #WorldOfCommodore #TPUG #VICEemu #GameDev #HomebrewComputing
theoasisbbs.com/rust-on-6502...
#Rust #MOS6502 #Commodore64 #LLVM #RetroComputing #WorldOfCommodore #TPUG #VICEemu #GameDev #HomebrewComputing
theoasisbbs.com/rust-on-6502...
Rust on 6502: Gareth Poole Shows LLVM-MOS for the C64 - The Oasis BBS
Rust on 6502 gets real. Gareth Poole shows LLVM-MOS compiling Rust to C64 PRG files, plus tips on size, speed, and tools.
theoasisbbs.com
January 14, 2026 at 2:24 PM
Rust on 6502: Gareth Poole Shows LLVM-MOS for the C64
#Rust #MOS6502 #Commodore64 #LLVM #RetroComputing #WorldOfCommodore #TPUG #VICEemu #GameDev #HomebrewComputing
theoasisbbs.com/rust-on-6502...
#Rust #MOS6502 #Commodore64 #LLVM #RetroComputing #WorldOfCommodore #TPUG #VICEemu #GameDev #HomebrewComputing
theoasisbbs.com/rust-on-6502...
Bubble Bobble X16 Update Shows Andy McCall’s Conversion Progress
#BubbleBobble #CommanderX16 #HomebrewGames #AndyMcCall #LLVM-MOS #ArcadeGames
theoasisbbs.com/bubble-bobbl...
#BubbleBobble #CommanderX16 #HomebrewGames #AndyMcCall #LLVM-MOS #ArcadeGames
theoasisbbs.com/bubble-bobbl...
Bubble Bobble X16 - The Oasis BBS
Bubble Bobble X16 gets a new Andy McCall update, showing progress on the Commander X16 conversion and LLVM-MOS assembly work.
theoasisbbs.com
June 25, 2026 at 1:14 PM
Bubble Bobble X16 Update Shows Andy McCall’s Conversion Progress
#BubbleBobble #CommanderX16 #HomebrewGames #AndyMcCall #LLVM-MOS #ArcadeGames
theoasisbbs.com/bubble-bobbl...
#BubbleBobble #CommanderX16 #HomebrewGames #AndyMcCall #LLVM-MOS #ArcadeGames
theoasisbbs.com/bubble-bobbl...
llvm-mos: Modern C/C++ on the Venerable 6502 | VCFMW 20 (2025)
YouTube video by VCF Midwest
www.youtube.com
October 13, 2025 at 4:02 PM
managed to compile some basic C code for the famicom disk system using llvm-mos, which does not officially support the fds as a target
November 9, 2024 at 6:24 PM
managed to compile some basic C code for the famicom disk system using llvm-mos, which does not officially support the fds as a target
Most fun thing I saw at #VCFWest was llvm-mos.org but there were so many cool inspiring projects by passionate folks who did not necessarily know how to do X but just rolled up their sleeves and went for it anyway.
VCF-W was very well run. Thanks and congrats to the organizers and volunteers.
VCF-W was very well run. Thanks and congrats to the organizers and volunteers.
llvm-mos
llvm-mos.org
August 3, 2025 at 5:38 AM
Most fun thing I saw at #VCFWest was llvm-mos.org but there were so many cool inspiring projects by passionate folks who did not necessarily know how to do X but just rolled up their sleeves and went for it anyway.
VCF-W was very well run. Thanks and congrats to the organizers and volunteers.
VCF-W was very well run. Thanks and congrats to the organizers and volunteers.
LLVM-MOS is a LLVM project fork supporting the MOS Technology 6502. LLVM-MOS converts freestanding C/C++ into somewhat efficient 6502 machine code, despite the 6502's hostility to the usual compiler techniques.
youtu.be/ejbTKtgSZI0?...
youtu.be/ejbTKtgSZI0?...
llvm-mos: Modern C/C++ on the Venerable 6502 | VCFMW 20 (2025)
YouTube video by VCF Midwest
youtu.be
April 16, 2026 at 10:29 PM
LLVM-MOS is a LLVM project fork supporting the MOS Technology 6502. LLVM-MOS converts freestanding C/C++ into somewhat efficient 6502 machine code, despite the 6502's hostility to the usual compiler techniques.
youtu.be/ejbTKtgSZI0?...
youtu.be/ejbTKtgSZI0?...
The toolchain for my SNES game, SUPER WILD CART, is Quite Interesting:
It's originally a Lua/Love2D game! + small 8-bit maths functions + graphics aligned to 8px tile grid. Which I transpiled to C. With well-paced level design the modern llvm-mos compiler runs it at 60fps! 🤯
It's originally a Lua/Love2D game! + small 8-bit maths functions + graphics aligned to 8px tile grid. Which I transpiled to C. With well-paced level design the modern llvm-mos compiler runs it at 60fps! 🤯
May I proudly present... Super Wild Cart
kinda Excite Truck × Flicky × Donkey Kong's Crash Course
Still *so much* to do but it is fun already! Pretty much locked 60fps, and do I have a story to tell about the toolchain…but that's one for another time.
#superwildcart #snesdev
kinda Excite Truck × Flicky × Donkey Kong's Crash Course
Still *so much* to do but it is fun already! Pretty much locked 60fps, and do I have a story to tell about the toolchain…but that's one for another time.
#superwildcart #snesdev
August 19, 2026 at 2:27 PM
The toolchain for my SNES game, SUPER WILD CART, is Quite Interesting:
It's originally a Lua/Love2D game! + small 8-bit maths functions + graphics aligned to 8px tile grid. Which I transpiled to C. With well-paced level design the modern llvm-mos compiler runs it at 60fps! 🤯
It's originally a Lua/Love2D game! + small 8-bit maths functions + graphics aligned to 8px tile grid. Which I transpiled to C. With well-paced level design the modern llvm-mos compiler runs it at 60fps! 🤯
SNESdev daily log 1:
Figured out how to compile SNES C code with llvm-mos.
Figured out how to compile SNES C code with llvm-mos.
July 1, 2026 at 11:54 PM
SNESdev daily log 1:
Figured out how to compile SNES C code with llvm-mos.
Figured out how to compile SNES C code with llvm-mos.
The performance I get using llvm-mos (8-bit 6502) for SNES DEV is nothing short of astounding, almost unexplainable.
And I'm running C that is transpiled from Lua 🤫
And I'm running C that is transpiled from Lua 🤫
August 12, 2026 at 8:28 AM
The performance I get using llvm-mos (8-bit 6502) for SNES DEV is nothing short of astounding, almost unexplainable.
And I'm running C that is transpiled from Lua 🤫
And I'm running C that is transpiled from Lua 🤫
I’m already obsessed with SNES dev: I love the constraints! 😍
It’s surprising that there isn’t a modern compiler for its 65816 CPU. But, interestingly, 8-bit code compiled with llvm-mos runs very fast.
So: thanks to these modern things, I’ve achieved 60fps with headroom!
It’s surprising that there isn’t a modern compiler for its 65816 CPU. But, interestingly, 8-bit code compiled with llvm-mos runs very fast.
So: thanks to these modern things, I’ve achieved 60fps with headroom!
If it's #scanlinesunday then it would be rude not to post the first screenshot of my SNES game engine bring-up.
I'm working hard to get 60fps and fill this thing with fun possibilities, ready to hit the ground running for SNES Dev Game Jam 2026.
I'm working hard to get 60fps and fill this thing with fun possibilities, ready to hit the ground running for SNES Dev Game Jam 2026.
June 29, 2026 at 3:22 PM
I’m already obsessed with SNES dev: I love the constraints! 😍
It’s surprising that there isn’t a modern compiler for its 65816 CPU. But, interestingly, 8-bit code compiled with llvm-mos runs very fast.
So: thanks to these modern things, I’ve achieved 60fps with headroom!
It’s surprising that there isn’t a modern compiler for its 65816 CPU. But, interestingly, 8-bit code compiled with llvm-mos runs very fast.
So: thanks to these modern things, I’ve achieved 60fps with headroom!
published the files here: https://github.com/TheEssem/llvm-mos-fds-example
November 10, 2024 at 11:27 PM
published the files here: https://github.com/TheEssem/llvm-mos-fds-example
I learned about llvm-mos.org this weekend at #VCFWest. So cool. Modern C++ and Rust for these lovely 50 year old parts!
llvm-mos
llvm-mos.org
August 5, 2025 at 2:43 AM
I learned about llvm-mos.org this weekend at #VCFWest. So cool. Modern C++ and Rust for these lovely 50 year old parts!
I think llvm-mos is actually decent: github.com/llvm-mos/llv...
Unlikely to beat hand-written assembly but not slow either
Unlikely to beat hand-written assembly but not slow either
GitHub - llvm-mos/llvm-mos: Port of LLVM to the MOS 6502 and related processors
Port of LLVM to the MOS 6502 and related processors - llvm-mos/llvm-mos
github.com
February 16, 2025 at 6:38 PM
I think llvm-mos is actually decent: github.com/llvm-mos/llv...
Unlikely to beat hand-written assembly but not slow either
Unlikely to beat hand-written assembly but not slow either
AGPX Releases “C64 Game Maker” – Create Commodore 64 Games Using BASIC and C++
#C64GameMaker #Commodore64 #RetroDev #BASIC #LLVM #Oscar64 #SIDSound #AGPX #RetroComputing #8BitGaming
theoasisbbs.com/agpx-release...
#C64GameMaker #Commodore64 #RetroDev #BASIC #LLVM #Oscar64 #SIDSound #AGPX #RetroComputing #8BitGaming
theoasisbbs.com/agpx-release...
AGPX Releases “C64 Game Maker” – Create Commodore 64 Games Using BASIC and C++ - The Oasis BBS
AGPX's C64 Game Maker lets users build C64 games with BASIC-like scripting and export to C++ for LLVM-MOS or Oscar64 compilers.
theoasisbbs.com
May 1, 2025 at 1:23 PM
AGPX Releases “C64 Game Maker” – Create Commodore 64 Games Using BASIC and C++
#C64GameMaker #Commodore64 #RetroDev #BASIC #LLVM #Oscar64 #SIDSound #AGPX #RetroComputing #8BitGaming
theoasisbbs.com/agpx-release...
#C64GameMaker #Commodore64 #RetroDev #BASIC #LLVM #Oscar64 #SIDSound #AGPX #RetroComputing #8BitGaming
theoasisbbs.com/agpx-release...
surprisingly, i couldn't find anything out there regarding C on the fds; there is a chance i _might_ be the first to do this with llvm-mos
November 9, 2024 at 6:38 PM
surprisingly, i couldn't find anything out there regarding C on the fds; there is a chance i _might_ be the first to do this with llvm-mos
Feeling tempted to create my own 6502 fantasy computer on a breadboard and adding llvm-mos-sdk includes.
January 15, 2024 at 1:44 PM
Feeling tempted to create my own 6502 fantasy computer on a breadboard and adding llvm-mos-sdk includes.
The SDK for developing with the llvm-mos compiler port is getting really good, have to give it a try.
github.com/llvm-mos/llv...
github.com/llvm-mos/llv...
GitHub - llvm-mos/llvm-mos-sdk: SDK for developing with the llvm-mos compiler
SDK for developing with the llvm-mos compiler. Contribute to llvm-mos/llvm-mos-sdk development by creating an account on GitHub.
github.com
December 5, 2023 at 10:29 AM
The SDK for developing with the llvm-mos compiler port is getting really good, have to give it a try.
github.com/llvm-mos/llv...
github.com/llvm-mos/llv...
Made two new LLVM-MOS ports today: Olimex Neo6502 and Watara Supervision. Should make it to upstream within the next 1-2 weeks. Admittedly, they both could use more library functions...
github.com/llvm-mos/llv...
github.com/llvm-mos/llv...
github.com/llvm-mos/llv...
github.com/llvm-mos/llv...
March 10, 2024 at 7:52 PM
Made two new LLVM-MOS ports today: Olimex Neo6502 and Watara Supervision. Should make it to upstream within the next 1-2 weeks. Admittedly, they both could use more library functions...
github.com/llvm-mos/llv...
github.com/llvm-mos/llv...
github.com/llvm-mos/llv...
github.com/llvm-mos/llv...
If you're a 65816 assembly programmer, your feedback is valued in this issue where we discuss assembler ergonomics for future LLVM-MOS improvements: github.com/llvm-mos/llv...
Improving assembler ergonomics for 65816 (and other) subtargets · Issue #454 · llvm-mos/llvm-mos
Note that this issue is about assembler syntax, functionality and ergonomics; it is, generally speaking, not about the ELF file format or the compiler backend. Status quo The current state of assem...
github.com
March 5, 2024 at 6:09 PM
If you're a 65816 assembly programmer, your feedback is valued in this issue where we discuss assembler ergonomics for future LLVM-MOS improvements: github.com/llvm-mos/llv...
#F256K2 finally got my spectrum analyzer part of my C mp3 player going on my 8-bit mode F256K2. That took a lot of tries and guesswork.
www.youtube.com/watc...
www.youtube.com/watc...
[F256K2] Spectrum Analyzer with mp3 playback
The F256K is from Foenix Retro Systems: https://c256foenix.com/
It is an 8 or 16 bit machine being able to swap around the CPU with a 6502, 65816 or 6809.
This playback program was coded with llvm-mos C adapted for the F256 machines in 8-bit mode. https://kangaroopunch.com/view/ShowSoftware?id=13
www.youtube.com
March 8, 2025 at 6:25 AM
#F256K2 finally got my spectrum analyzer part of my C mp3 player going on my 8-bit mode F256K2. That took a lot of tries and guesswork.
www.youtube.com/watc...
www.youtube.com/watc...
I've noticed a fair few BBC Micro enthusiasts on my Bluesky feed. I wonder - how much work would it be to add LLVM-MOS support for that architecture? What good documentation sources exist, if any?
October 27, 2025 at 4:11 PM
I've noticed a fair few BBC Micro enthusiasts on my Bluesky feed. I wonder - how much work would it be to add LLVM-MOS support for that architecture? What good documentation sources exist, if any?