The never-released HP-72S / HP-74S - the successors of the HP-71B

[Alejandro Paz(Germany)]

Very nice work ! I see that my dream of a 4 or 8 line 71 may not be that crazy !

But I have a question regarding these routines to extend the stack: RSTK<R and R<RSTK, they extend the stack lets say from 8 to 24, adding up to 16 levels. Do you see any benefit from implementing a deeper stack and avoiding these routines ? (one would have to skip over these long gosubs/very long gosubs (4 levels needs ~63 opcodes).