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AX = 4A11h BX = 0003h CL = drive number (0=A:) of compressed drive
Return:
CL = FFh on error (not compressed drive) CL <> FFh driver unit number of host drive ES:SI -> device driver's strategy routine ES:DI -> device driver's interrupt routine BX destroyed
Note: In conjunction with subfunction 0004h, this call allows disk caches like SMARTDRV to apply a device driver wrapper to DoubleSpaced drives just like SMARTDRV applies to regular block devices
See Also: AX=4A10h/BX=0007h - AX=4A11h/BX=0000h - AX=4A11h/BX=0004h
Category: File/Disk Compression - Int 2Fh - D
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