The semi-virtual diskette, otherwise known as SVD, is a small hobbyist hardware device that emulates a floppy drive and floppy disk.The SVD is designed to be attached to an old computer such as a TRS-80 or a computer of the Apple II family.Images of floppy disks are uploaded to the SVD through a personal computer's serial port (USB support is in development). The SVD presents these images as physical floppies to the old computer, allowing it to be booted or to otherwise run old software.