PC/USB Interface Miscellaneous modules MF Module to control Motorfaders IIC Modules to communicate to other (Microcontroller-)Devices via I2C RTP-MIDI module MIOS32 firmware includes direct link to KissBox OEM RTP-MIDI module over high-speed SPI The MIDIbox Operating System (MIOS) The MIDIbox Operating System (MIOS) facilitates design of flexible MIDI controller applications. MIOS adheres to a non-commercial, open platform as fundamental to the exchange of ideas and personal adaptations not possible with commercial controllers. Most controllers built by the community are based on existing documented designs, and begin life with the feature set provided by the existing firmware. End users can enhance their devices with exchangeable program code, and customize them to suit their host application, synthesizer or other MIDI device. Users can also customize to suit their own preferred workflow, or design a new project from scratch. Application source code, module schematics and PCB layouts are available free for non-commercial use as templates for modifications and improvements. Thus MIOS and the Hardware Platform allow an easy entry to hobbyist microcontroller development, while making possible applications outside the realms of the commercial, mainstream MIDI market. MIOS was licensed under the GPL until version 1.8. Later versions now require Thorsten Klose's permission for commercial use. Specifications The operating system consist of a kernel that provides user hooks to hardware and software events, and functions for interaction with Hardware Platform modules. One core module with a PIC18F452 microcontroller can handle up to 128 digital inputs up to 128 digital outputs up to 64 analog inputs character and graphical LCDs up to 8 BankSticks (I2C EEPROMs) one MIDI In and one MIDI Out, or an RS-232 serial COM port Background drivers are available for the following control tasks: MIDI I/O processing Bootstrap loader Analog conversion of up to 64 pots, faders or other analog sources with a 10-bit resolution Motor handling for up to 8 motorized moving faders with a 10-bit resolution Handling of up to 64 rotary encoders Handling of up to 128 buttons, touch sensors or similar digital input devices Handling of up to 128 LEDs, relays, Digital-Analog-Converters or similar output devices. In multiplex mode a nearly unlimited number of LEDs, LED rings and LED digits can be driven Read/Write from/to EEPROM, Flash, and BankStick Linking PIC18F Core modules via MIDIbox Link The whole operating system has been written in assembly language and has been optimized for speed. MIOS currently uses 8k of