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AX = 4A11h BX = 0004h CL = drive number (0=A:) of compressed drive DL = unit number for new driver entry points DH = 00h ES:SI -> device driver strategy routine to call for drive ES:DI -> device driver interrupt routine to call for drive
Return:
CL = FFh on error (not a compressed drive) BX destroyed
Program: DBLSPACE.BIN is the resident driver for DoubleSpace, the disk-compression software bundled with MS-DOS 6.0
Note: In conjunction with subfunction 0003h, 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=0003h
Category: File/Disk Compression - Int 2Fh - D
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