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Int 2F Fn 122B U - DOS 3.3+ Internal - Ioctl [D]
AX = 122Bh
BP = 44xxh
SS = DOS DS (must be using a DOS internal stack)
additional registers as appropriate for INT 21/AX=44xxh
Return: as for INT 21/AH=44h
Notes: equivalent to INT 21/AH=44h, but may only be called when already inside
a DOS function call
sets user stack frame pointer to dummy buffer, moves BP to AX, performs
IOCTL, and restores frame pointer
used by NLSFUNC in accessing COUNTRY.SYS when invoked by the DOS kernel
See Also: INT 21/AH=44h
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