Neotron Pico BIOS

This is the Neotron BIOS for the Neotron Pico board.

Compatibility

This BIOS will run on the Neotron Pico v0.5.0. Other boards based around the Raspberry Pi Pico could be supported with just a minor change to the pin configurations.

Features

The Neotron Pico offers:

Dual Cortex-M0+ clocked at 133 MHz
256 KiB RAM
2048 KiB Flash
SD/MMC Slot
4096-colour VGA output
Stereo 16-bit 48kHz audio
Four Neotron expansion slots
A dedicated Board Management Controller, offering:
- Dual PS/2 ports
- 5-wire TTL UART
- Power/reset control

Currently the BIOS only uses a single core, and starts the OS on the same core. Later versions may move some functionality onto the second core (e.g. screen updates) for performance reasons.

Changelog

See CHANGELOG.md

Licence

Neotron-Pico-BIOS Copyright (c) Jonathan 'theJPster' Pallant and the Neotron Developers, 2021

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.

See the full text in LICENSE.md. Broadly, we (the developers) interpret this to mean (and note that we are not lawyers and this is not legal advice) that if you give someone a Neotron Pico, you must also give them one of:

Complete and corresponding source code (e.g. as a link to your own on-line Git repo) for any GPL components (e.g. the BIOS and the OS), as supplied on the Neotron Pico.
A written offer to provide complete and corresponding source code on request.

If you are not offering Neotron Pico commercially (i.e. you are not selling the board for commercial gain), and you are using an unmodified upstream version of the source code, then the third option is to give them:

A link to the tag/commit-hash on the relevant official Neotron Github repositories - https://github.com/Neotron-Compute/Neotron-Pico-BIOS and https://github.com/Neotron-Compute/Neotron-OS.

This is to ensure everyone always has the freedom to access the source code in their Neotron Pico.

Contribution