Instruction Manual
17
Disk Formats
When you choose the Format as... button, the disk image stored in RAM is formatted
as an empty MS-DOS disk, with a single file called Put files here...TXT. SV1115IPEXT is
able to read most MS-DOS/Windows formatted disks and presents the files via the Web
interface. However, disk emulation occurs at the lowest level so that other disk formats
can be used, if you have the tools needed to create and read the disk images. At the
bottom of the page are the upload and download options for the entire disk image.
Any image that is exactly 1,474,560 bytes long will be treated as a floppy. Images of
other sizes are supported up to 8MB.
CD-ROM Mode
The SV1115IPEXT does not store any data in this mode. Instead, it emulates a USB
CD-ROM drive with a disk inserted. The data from that disk must be provided by an
external web server. You will need a copy of the CD-ROM contents that you want to
emulate as an ISO file. This is a byte-for-byte copy of track one (the data track) of a data
CD-ROM. The ISO file must be made available on a web server that can be accessed
by SV1115IPEXT. To switch to this mode, type in a URL pointing to the ISO image, and
click on Commit. The system will connect to the web server and test the file for access.
If successful, you will be shown a short report on the file contents, and the disk will be
ready to use. Currently there is no other way to preview or browse the contents of the
CD-ROM image, except from the host.
CD-ROM Web Server Requirements:
• Data must be hosted on a web server that the SV1115IPEXT can access directly.
• An image of a bootable CD-ROM disk can be used by the BIOS to boot an operating system.
• The image file itself may be any size, but it will typically be less than 700 megabytes.
Normally this file will be an ISO image (an ISO-9660 file system) but any disk image
may be used.
• Web server must support “byte ranges”. Persistent connections are used, if available, as this
greatly improves performance. “Read-only” access is provided; writing is not supported.
• CD-ROM block size must be 2048 bytes. Unfortunately, XA-Data type tracks are not supported.
