WP 34S - How do I use aGTO with stack registers?

[Martin Hepperle]

Hi,

I played a bit with the "alpha GOTO" (aGTO) command which is a very powerful command for branching.

The description on p. 186 of my printed manual (V3.3) reads:
aGTO _s_
Interprets _s_ as a character code. Takes the first 3 characters of the converted code (or all if there are less than 3) as an alpha label and positions the program pointer to it.

I had some problems with applying this function correctly.

1) Direct addressing
If I have 101 or 101.234 in R00 and "aGTO 00", the program counter is set to LBL 'e' (char code 101d).
This works as I expected.
However, if I have 101234 in R00 and "aGTO 00" I get "No such Label".
Obviously the register must contain less than 4 digits and the command does not just "take the first 3 characters", as per description.

2) Indirect addressing
If I have 101 in R00 and 0 in R01 "aGTO->01" the program counter is set to LBL 'e'.
This works as I expected.

3) Indirect addressing via a stack register
If I have 101 in R00 and 0 in RX "aGTO->.X" the program counter is set to LBL 'e'.
This works as I expected.

3) Direct addressing via a stack register
If I have 101 in RX and "aGTO .X", I would expect the same outcome, but I receive "No such Label".
Am I doing something wrong here?

Proposed alternative description:

aGOTO _s_
Interprets the content of _s_ as a character code.
Converts the integer part of the register content (must have 3 or less digits) to a character and positions the program pointer at the corresponding global label.
... some comments on the usage of stack registers if needed ...

Martin