Browsing old BYTEs - Signetics Instructor 50

< > While browsing several old BYTE magazines, I came across an ad for < > Signetics Instructor 50 SBC. Althoug the ad wasn't very good, it looks < > it could be an SBC style S-100 Altair clone with a hex keypad, display < > data switches. Sort of an Altair-KIM hybrid (if one can imagine such < > thing). < < There was at least one other SBC like this. I have an Explorer 85 that < has room for two S-100 slots (mine has one S-100 connector soldered in) < And I believe my SD Z-80 Starter System SBC can also accomodate an S-10 < board. As someone with an actively used Netronics Explorer 8085, yes that one had two s100 slots and a 5 slot extender (level E) as well. That class of machines was not uncommon. There was a front pannel replacement with display and keypad (8080 too!) for s100 machines. Allison