-------------------------------------------------------------------------------
-----------H----H--X----X-----CCCCC-----22222----0000-----0000-----11----------
----------H----H----X-X-----C--------------2---0----0---0----0---1-1-----------
---------HHHHHH-----X------C----------22222---0----0---0----0-----1------------
--------H----H----X--X----C----------2-------0----0---0----0-----1-------------
-------H----H---X-----X---CCCCC-----22222----0000-----0000----11111------------
-------------------------------------------------------------------------------
-- Contact: hxc2001<at>hxc2001.com --------------------- https://hxc2001.com --
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HxC Floppy Emulator project
(c) 2006-2025 Jean-François DEL NERO / (c) HxC2001
Forum    : https://torlus.com/floppy/forum

Store    : https://hxc2001.com/store/
Manual   : https://hxc2001.com/docs/gotek-floppy-emulator-hxc-firmware/
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Since March/April 2021 we can see some new Gotek variants on the market  : 

Due to the electronic components shortage, these new Gotek revisions use differents MCUs.
The STMicroelectronics STM32F105 MCU was replaced by Artery MCUs : AT32F415RCT7, AT32F415CBT7, AT32F415KBU7 ...

These MCUs are "mostly" compatible with the previously used STM part but there is an important difference : The RAM size. 
While the STM32F105 offers 64KB of RAM, these Artery parts have only 32KB of RAM.

Others points : 

- The AT32F415RCT7 is a 64 pins device. This Gotek PCB version and the pins assignements are the same as the STM version.

- The AT32F415CBT7 is a 48 pins device. Some headers are gones and the pins assignement is different.

- The AT32F415KBU7 is a QFN 32 pins device. Some headers are gones and the pins assignement is different.

All of these points imply changes in the firmware :

-> Reduce severals memory buffers/cache to fit the RAM usage into the 32KB available on these parts.

-> Remap some pins for the 48 pins and 32 pins MCU version.

Current HxC firmware Artery Gotek support status (firmwares >= v4.2.X.X) :

- The bootloader was updated to support all Gotek MCU variants : STM32F105RB6, AT32F415RCT7, AT32F415CBT7, AT32F415KBU7...

- The server was updated to support all Gotek variants :
  The bootloader can installed on all these Gotek using the normal online procedure : https://hxc2001.com/docs/gotek-floppy-emulator-hxc-firmware/pages/bootloader-installation.html

- The firmwares v4.2.x.x work on any Gotek : STM32F105, AT32F415RCT7, AT32F415CBT7, AT32F415KBU7...