Fixer-board for ZX-Spectrum+2A/+3Designed by Ternary Research Corp. in United States of America
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...Read More…
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).
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Usually we ship on the next business day, but sometimes it could be a week or so if board is not yet fully assembled and/or tested.
Brian | June 26, 2017
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