This adapter "fixes" ZX-Spectrum+2A/+3 to make those models better compatible with old ZX-Spectrum extensions as +D interface. Users reported compatibility of this "fixer" with devices listed below:
Original +D interface
Datel Plus D
Interface 1 (Micro Drive)
Swift Disc II
16-pin DIP is resistor network (8 independent 100 Ohm resistors) to protect data bus. Two diodes (1N914 or 1N4148) make proper bus request to +2A/+3 machine (making OR logic).
Since 2016 version +12V of the machine pre-wired to +9V signal of peripheral board (so no jumper is needed by default to connect for example +D interface to +2A machine).
This board is "Open Hardware" - source files for gEDA and Gerber files for manufacturing are freely available (see link on the right). You can even order 3 bare boards on OSH Park web-site (link to Documentation on the right).
|Shipping Rate||First item||Additional items|
United States Postal Service: First-Class Mail (1 week)
United States Postal Service: Priority Mail (2-3 days)
Padded Flat Rate Envelope
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TERNARY RESEARCH CORPORATION was incorporated in New York State in June 2012 and relocated to Colorado in September 2017. Our goal is to give a chance to balanced ternary electronics. Also we are selling some peripherals for retro computers as ZX-Spectrum.
Usually we ship one the next business day, but sometimes it could be a week or so if board is not yet fully assembled and/or tested.
If you chose "First Class Parcel (no tracking)" as shipping option and you live in Australia, Belgium, Canada, Croatia, Estonia, Finland, Germany, Great Britain, Hungary, Israel, Latvia, Lithuania, Malaysia, Malta, Netherlands, New Zealand, Singapore, Spain or Switzerland then we will try to add Electronic Delivery Confirmation option to the package at no charge and it will be fully trackable from the beginning to end.