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AX = 12FFh BL = 00h
Return:
AL = DDh if installed BH = state (00h disabled, nonzero enabled) BL = readonly flag (00h writable, nonzero read-only)
Program: FDAK-DDT is the FreeDOS Alternative Kernel Device Drivers Testing release by Yury A. Semenov
See Also: AX=12FFh/BL=07h
Category: Other Operating Systems - Int 2Fh - F
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