The INTERSPEC was a BUS Expansion system for the Sinclair ZX Spectrum. It enables the user to have both Digital and Analogue Input and Output ports for the Speccy.

INTERSPEC TOP INTERSPEC RIGHT INTERSPEC LEFT INTERSPEC DCP EXPANSION END INTERSPEC DCP SPECTRUM CONNECTOR END

I used mine to control Meccano Models and other displays and in my retirement hope to resurrect the hobby. The Speccy has been dusted off, repaired and working once more. I dug out the INTERSPEC and then discovered I had lost the instructions on how to use it. I searched and searched and found a few references to it, plus some pictures which included a magazine review. This had some basic operational information in it which allowed me to test the INTERSPEC and it worked OK.

I found the following page https://retro-computing.org/?page=item&id=256 showing a picture of an archive copy of the instructions. I contacted them and they kindly sent me a scan of it. Next, I spent some time OCRing the scan into a WORD document, redrew the basic diagrams as the scan quality was not good enough. Editing, correcting, bookmaking and finally creating a full manual with photos. So here it is:- RECREATED MANUAL

If you find this manual useful, please do let me know.

I'm ging to produce a series of videos showing the testing and use of the INTERSPEC and maybe even adding extra peripherals / connectivity.

Here's my introductory video of me checking and testing the INTERSPEC.