I’m preparing to try interfacing my Scopewriter to a SCELBI computer.  One issue I had with the Scopewriter was the character generator.  It was designed to use a TMS2501, which I have been unable to find a source for.  A while back, I adapted a GI 2513 for the purpose, but it was kind of a hack.  A while back, a friend in Europe sent me a substitute, a TESLA MHB 2501, which he says are readily available for low prices over there.

Tesla MHB2501 in scopewriter

This substitute works fine. Stay tuned for an future blog article describing how this interfacing project goes.