HP-65 1333A02242 display missing all the decimal dots

[albertofenini]

Thanks Tony,
I understand that I'm missing some basic knowledge, and I should go back to study the documents ...
What is the purpose of each of disp0, disp1, disp2, disp3, disp4 ?
Is disp4 wat you call "step" ?
I know that it may be not easy to summarize these concepts so I will appreciate
any hints that will help to better understand the working scheme ...
For instance, with reference to the PDF you mentioned at the beginning of this post
can we say Disp0 = A, Disp1 = B, Disp2 = C, Disp3 = D, Disp 4 = E ?

(11-09-2020 01:22 PM)teenix Wrote:  

(11-09-2020 12:42 PM)albertofenini Wrote:  what is the "Step" output ?

This is the signal from the anode driver to step the cathode driver to the next display digit.

cheers

Tony