circle
mt32-pi
circle | mt32-pi | |
---|---|---|
31 | 33 | |
1,733 | 1,172 | |
- | - | |
8.9 | 2.5 | |
11 days ago | 10 months ago | |
C | C++ | |
GNU General Public License v3.0 only | GNU General Public License v3.0 only |
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circle
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MiniScript on a bare-metal Raspberry Pi
If you're a developer and feeling adventurous, you can also try building it yourself. The source is all on GitHub. It uses the circle-stdlib project (which is circle plus some additions to support much of the C and C++ standard libraries) as a submodule; hopefully I've set that up correctly, but you could always clone that separately and place it in the MiniScript-Pi folder. Check out circle's build instructions for info on setting up your toolchain. (Mac users: be careful with the configure script, which does not work properly on MacOS; find me on Discord and I'll help you fix the script or configure manually.)
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Bare Metal Emulation on the Raspberry Pi – Commodore 64
I suggest checking out circle https://github.com/rsta2/circle since it's basically a library for the pi hardware. I'm doing some experiments with it myself now.
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Assembly coding without OS
You can also run a Pi without an operating system, programming it in C or C++ probably. See for example: GitHub - rsta2/circle: A C++ bare metal environment for Raspberry Pi with USB (32 and 64 bit)
- Bare Metal Emulators and launcher for RetroFlag GPI v1
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Help with C64 Emulation (never used a C64 before in my life)?
BMC64 is VICE in a trenchcoat unikernel / bare-metal framework called Circle: https://github.com/rsta2/circle
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Smalltalk-80 on Raspberry Pi: A Bare Metal Implementation
It uses the circle library (https://github.com/rsta2/circle) to provide a minimal runtime (mainly to interface with the hardware).
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How do I get started with making my own Linux based OS on Embedded Hardware?
I experimented with circle the other day (https://github.com/rsta2/circle) Looks promising, and most likely within your knowledge of C/C++ development.
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EmuTOS: A Modern FOSS Replacement OS for the Atari ST – and the Amiga Too
Natively would be amazing but a vast amount of work.
The way Apple moved classic MacOS from 680x0 to PowerPC was to write a tiny kernel emulator, with an API to run native stuff on the metal, and run more or less the whole OS under emulation, profile it and just translate the most speed-critical bits.
That's a lot of work for a FOSS project but given the performance delta between 1980s 680x0 and 2020s ARM, total emulation of the whole thing should be perfectly fine. It's how the PiStorm Amiga upgrade works.
https://amigastore.eu/853-pistorm.html
So all I envision is something like Aranym:
https://aranym.github.io/
... running on top of Ultibo, say:
https://ultibo.org/
Or maybe Circle:
https://github.com/rsta2/circle
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Solutions for >1GHz microprocessor with option for bare metal or freeRTOS
Circle is a C++ bare metal programming environment for the Raspberry Pi.
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New in this sub, some questions…
The only other reasonable option would be to port it to a new platform which is popular that has a few well documented hardware interfaces so as not to create a hellish nightmare writing drivers. Maybe then you could do a one-off port to that platform (though you might have to re-target the HolyC compiler to target it instead if it is not x86_64). The Raspberry PI seems like a decent option here since there is already a baremetal C++ library supporting USB, keyboard, mouse, sound, video, and as an added bonus UART, I2C, SPI, GPIO. You would have good code examples for porting all the necessary drivers. But obviously this would still be a lot of work and the compiler would need to be re-targeted and user space adapted for running on ARM. That being said backwards compatibility is strong, ARM seems actually interested in keeping it that way (at least for now). The library I'm talking about is here: https://github.com/rsta2/circle
mt32-pi
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Something between Rpi and Rpi Pico?
I have just seen https://github.com/dwhinham/mt32-pi but it doesn't seem as easy to play with and well-documented as the other software I've used.
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Attempting to learn MS-DOS; Here's my DOS Gaming Box!
Cool system. I'd see if you can get a hold of a Roland MT-32 type synth. If your sound card has a daughterboard connector (it does, top right corner) you can get a Serdaco Wavetable board which would let you have generalMIDI output. An external MT-32 or a mt32-pi will also greatly improve your music output.
- Electronic music icon Korg makes music with Raspberry Pi
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Roland MT-32 Emulation
Regardless the best option is a MT32-pi solution. https://github.com/dwhinham/mt32-pi/wiki/Custom-hardware
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Sound canvas / tone generator
I think MT-32 and SC-55, at least, are wildly overpriced for what they are from a music perspective, thanks to the retro gaming bubble. If you want to mess around with one, I would recommend checking out mt32-pi. In addition to the extremely limited MT-32 sound palette, it can also load soundfonts, which really opens things up a lot.
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Raspberry Pi in synths?
Check out Mini-Dexed and MT32-Pi. I use both and they're great. They are built on the bare-metal "circle" platform, so they don't run on top of linux (so no faffing about with JACK routing, etc.).
- Ask HN: What cool projects do you suggest I build with a Raspberry Pi 2W
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My take on the MiniDexed - first synth-diy project completed
its a CJMCU 5102 DAC Board, which is one of the supported soundcards. You can use the internal headphone jack of the Pi as well, however it only supports 12bit PWM audio there, which is usable but has a lot of artifacts and I would not recommend therefore
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I'm not sure where else to post this but I need a bit of help.
You can turn a Raspberry Pi into a Yamaha DX7 using MiniDexed or a Roland MT-32 using mt32-pi (which also loads soundfonts via FluidSynth). I use both of these regularly. They're great. Both work with USB MIDI controllers with no additional hardware required and boot headlessly in a few seconds to work like a true instrument.
- Dexed FM synthesizer similar to DX7 running on bare metal Raspberry Pi
What are some alternatives?
rust-raspberrypi-OS-tutorials - :books: Learn to write an embedded OS in Rust :crab:
munt - A multi-platform software synthesiser emulating pre-GM MIDI devices such as the Roland MT-32, CM-32L, CM-64 and LAPC-I. In no way endorsed by or affiliated with Roland Corp.
raspberry-pi-os - Learning operating system development using Linux kernel and Raspberry Pi
stm32mp1-baremetal - Baremetal framework and example projects for the STM32MP15x Cortex-A7 based MPU
MiniDexed - Dexed FM synthesizer similar to 8x DX7 (TX816/TX802) running on a bare metal Raspberry Pi (without a Linux kernel or operating system)
Arduino-USBMIDI - Allows a microcontroller, with native USB capabilities, to appear as a MIDI device over USB to a connected computer
rpi4-osdev - Tutorial: Writing a "bare metal" operating system for Raspberry Pi 4
EspTinyUSB - ESP32S2 native USB library. Implemented few common classes, like MIDI, CDC, HID or DFU (update).
dts2hx - Converts TypeScript definition files (d.ts) to haxe externs (.hx) via the TypeScript compiler API
zynthian-sys - System configuration scripts & files for Zynthian.
8821cu - Linux Driver for USB WiFi Adapters that are based on the RTL8811CU, RTL8821CU and RTL8731AU Chipsets
Main_MiSTer - Main MiSTer binary and Wiki