HP 110 (not Portable Plus) Technical Manual

[Martin Hepperle]

So I was spending a week researching and probing and finally finding out how the Alpha screen RAM with the weird arrangement of character cells and attribute half-nibbles on the HP 110 is organized.

Yesterday, I revisited the early issues of "The Portable Paper" and quickly found a description of the RAM layout together with some Pascal routines for directly accessing the screen (in this case, The Portable Paper V1 N3 , 1986).

At least the findings are the same...

So: if someone else wants to know more about the Portable (or the Portable Plus) it is always worth to read through the issues of The Portable Paper. Later issues more and more focused on the Portable Plus, of course.

Martin