Spectravideo SVI-777
This page was last modified 12:18, 16 June 2021 by Mars2000you. Based on work by Rderooy and Gdx.



The Spectravideo SVI-777 Stringy Floppy Drive is not actually a floppy drive but a special cassette data recorder. Nowadays the cassette tapes for the SVI-777 (Microwafer tapes) are very, very rare.

This device needs to be connected to both the data recorder connector and the general port 2. It must be powered by 2, size D, batteries. It can save roughly 14~100 kB per tape, depending on the length of the tape.

The operating system must be loaded before use. It is provided on a Microwafer tape. The steps to load it are as follows:

  • Connect the Stringy Floppy Drive to the data recorder and joystick 2 connectors
  • Turn ON the connected peripheral devices and the MSX
  • Insert the Master tape into the Stringy Floppy Drive
  • Type: bload"cas:boot",r under Basic (the name "boot" can be omitted)


Spectravideo SVI-777
Spectravideo SVI-777 box
Spectravideo SVI-777 with Master tape


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