Some handmade Eurocom-1 Interface cards. The Eurocom 1 was a single board computer produced in Germany by ELTEC in the 1970´s. It is based on the 6501 processor.
The EUROCOM-1 computer is a low-cost microprocessor system, which can be assembled easily from readily-available components, was tested for its ability to serve as a multi-purpose device for recording experimental data. The data were recorded on commercial cassette tapes and could be computer-processed without time-consuming manual work.
http://www.computermuseumgroningen.nl...
http://www.computermuseum.li/Testpage...
http://myoldmac.net/share/RetroChalle...
--- Update --
Info from Nathan:
http://www.classiccmp.org/pipermail/c...
A bit down in this message (circa 1997): In the section starting (3.) it is claimed that the MC68A45P is a video chip.