- Ace0001 *Is prototype?
- Amstrad PCW-10
- Atari 1400 XL (Atari)
- Atari 1400 XLD (Atari)
- CBM 4032-P (Commodore) *Rumored to exist)
- Commodore 364 (Commodore)
- Commodore 900 (Commodore)
- Commodore LCD (Commodore))
- Cyber 974 (Control Data Corporation)
- Vic20 TV (Commodore)*Rumored to exist)
- Dragon MSX (Dragon Data, Ltd) *Is this a prototype?
- Dragon Professional (Dragon Data, Ltd) *Rumored to exist
- Hypercube (IMSAI) *Rumored to be a prototype or not exist
- Kaypro 12 () * Rumored to be a prototype
- SX-100 (Commodore))
- TI99/5 (Texas Instruments)) *Rumored to be a prototype
- TI99/8 (Texas Instruments) *Mess emulates this
- VG 8240 (Philips) *Prototype of VG 8235?
- Timex TS2000 (Timex)
- Timex TS2016 (Timex)
- Timex TS2048 (Timex)
See Also
- List of prototype consoles
- List of vaporware