MIOS is the Operating System of the Chip.
This Page covers MIOS and the BOOTLOADER (or Bootstrap Loader). General Informations can be found in the Intro-Article: what is a MIDIbox.
There are two versions of MIOS: The (older) MIOS8, used for MBHP_Core modules equipped with 8bit PIC uControllers and MIOS32 used for the Core_STM32 modules with 32bit STM controllers. If you are planning to build a new MidiBox, you should use the newer Core_STM32 that allows much more complex devices.
MIOS8 is used for MBHP_Core modules equipped with PIC18F452, PIC18F4620 or PIC18F4685.
The Article MIOS Bootstrap For Newbies (also available as MIOS Bootstrap in different languages) contains important informations about how to upload MIOS - the operating system - and an application.
Developers should consult the related project pages or Application Development.
Frequently Asked Questions
MIOS32 is used on Core_STM32 boards, equipped with the 32bit STM32F103RE processor. MIOS32 is prepared for other 32bit uCs as well and allows platform independent applications.
MIOS32 on a CORE_STM32 is more powerful than MIOS8:
MIOS32 uses the realtime operating system FreeRTOS and allows simple multitasking with different priorities.
It also supports native USB MIDI for faster code upload and MIDI transfer.
Interfaces such as SPI and I²C can be used with DMA, allowing fast transfer at low CPU load
Besides hardware multiplier and division units the STM32F103RE provides more peripherals:
The STM32F103RE provides 512kB of Flash and 64kB RAM
BankSticks are replaced by SD Cards for more and faster memory