This is the command createhdf that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
createhdf — Create a blank IDE hard disk image in .hdf format
createhdf [ -c ] [ -s ] cylinders heads sectors file
createhdf creates a blank image of an IDE hard disk in .hdf format for use with Sinclair
ZX Spectrum emulators.
-c specifies that the .hdf image should be created in `compact' mode, where only the
low byte of every word is stored in the image. This is useful for saving space if
the hard disk image is for use with an interface which accesses only the low byte
of every word.
-s specifies that the .hdf image should not be created as a sparse file. Normally,
createhdf will attempt to create the hard disk image as a `sparse file', where the
operating system knows that the file consists mostly of zero bytes and fills those
in without using any space in the file. This option disables this. (There's nothing
`magic' about this: if data is written to the file, it will take up space just like
any other data; it's only empty space which is synthesised by the operating
specifies the version of .hdf image to be created. Valid values are `1.0' for a
version 1.0 file and `1.1' for a version 1.1 file. Defaults to creating version 1.1
specifies the number of cylinders in the image.
heads specifies the number of heads in the image.
specifies the number of sectors in the image.
file specifies the file to which the image should be written.
Use createhdf online using onworks.net services