It depends on how you installed TinyCorePure64 and/or how you are using it.
If you burnt the TinyCorePure64 iso to cd/dvd and chose to boot the gui it will use Xfbdev by default.
If you installed TinyCorePure64 to hd/usb stick it depends on which extensions you chose to load onboot.
In order to test, I would suggest setting only Xfbdev, flwm, aterm and wbar to load onboot, reboot and see what happens.
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