<= R0 = bitmask of supported features
bit 0: FileCore supports new error scheme
bit 1: FileCore supports bit 11 of disc flags
bits 2-31: reserved, equal to zero
This call returns additional features supported by FileCore and is only of use to filing systems which register with FileCore as a FileCore filing system.
Of course, with old versions of FileCore this will be an unknown SWI, so your code might go:
SWI "XFileCore_Features"
MOVVS R0, #0 ; no new features at all
:
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