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* Welcome to the BOB for Bittboy / Pocket-go Powkiddy V90-Q90 All in one firmware release*
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By default it is configured for Bittboy v3.5 if you put the microsd in a Powkitty or PocketGO you will get the inverted image.

So that it works well in Powkiddy, it is as easy as copying the file "r61520fb.ko" from the kernel \ Powkiddy folder to the kernel \ folder, overwriting the existing one. Or if you are on windows, double click on "Switch to Powkiddy.bat". If you have a Bittboy v2 or v2.5 and when you start it hangs or does not work, do the same but with "Change to Bittboy v2 and V2.5.bat"

To put it back in modern Bittboy, do the same but with "Switch to Bittboy v3.5.bat".

Download here https://rs97.bitgala.xyz/Miyoo%20Devices/Bittboys-PocketGo-Powkiddy%20S90-Q90/Bittboys-PocketGo-Powkiddy%20S90-Q90_.7z

This firmware works on all devices (Bittboys-PocketGo-Powkiddy S90-Q90) one flashable firmware just add your own bios and games etc use the provided .bat files on the MAIN drive to change from your device 



Install Intructions
Run the USBImager program (you can also use balenaetcher, rufus, etc) and open the image. Then choose the microsd card as the destination (look at the size) and click on write. 

If you have a Bittboy v3.5 (the most recent) when you finish take out the card, put it in the console, turn on and play. If you have a Bittboy v2 / 2.5, Powkiddy Q90 / V90 or PocketGo, go to the next step.

PLEASE **Note if you cant see the main drive use any partition free program and give the MAIN drive a letter you will then see it.

You can copy games to the corresponding Roms folder or double clicking "Switch to Powkiddy or PocketGO.bat" will change the video mode so that it is not reversed. If you have a Bittboy v2 or V2.5 double click on "Switch to Bittboy v2 or v2.5.bat"

Activate / Deactivate vibration 
When the battery drops below 50% it starts to vibrate. If you want to activate or deactivate this, double click on Low Battery Vibration - ENABLE or DISABLE.

Thank's
thanks goes to Nacho Portillo (BOB Best Of the Best)
To PLRG and @salvacam for making a lot of modifications in the Spectrum Fuse emulator that have made it a delight.
Thanks to Javi Ortiz (great spectrum guru)
To all the regulars that by not mentioning them I do not forget