HP-25 Subroutines possible?

[Matt Agajanian]

(06-20-2017 09:19 PM)Gene Wrote:  And although labels make things easier, they could have simply added a GSB and RTN using line addressing. No labels.

I think the rom was full. Much stronger point as you suggest. :-)

X=Y?
GSB 23

at step 23
Do this
Do that
RTN

I know, Portokalos & Miller (Apple and Oranges), even the SR-56 had line number addressing for its subroutine branching. Although, maybe engineering the 25 did face ROM space limitations.