DM42 and labels

[rprosperi]

(05-19-2020 10:53 PM)Sylvain Cote Wrote:  

(05-19-2020 09:17 PM)rprosperi Wrote:  I guess I didn't realize that a RTN, with no pending return stack just does a STOP.

Same behaviour on all RPN programmable since HP-67.

Not so. On some (many?, few?) machines, when you reach a RTN, it goes back to step 000 first, and then stops.

Here's an HP-34C program fragment:

Code:

01 LBL-A
02 5
03 0
04 0
05 0
06 ENTER
07 6
08 X (multiply)
09 RTN
10 1
11 CHS
12 *
13 RTN

GTO .000
[R/S]

Change to PRGM mode, what line number are you on?

Give it a try...

Edit-1: HP-41 stops upon hitting the RTN, with the PC on the next statement, as also seen on the 42S

How about other machines???

Edit-2: HP-15C goes to step 000 and stops, like the 34C

Edit-3: HP-67 stops upon hitting the RTN, with PC on the next statement

Who else has machines to test? Maybe a pattern will emerge, but it seems this behavior was not at all consistent across various model lines.