Clearing Return Stack on HP-15C

[Nihotte(lma)]

(10-06-2024 12:58 PM)Pekis Wrote:  So, when does the HP-15C clear the return stack, after a "ERROR 5", or after a CLEAR PRGM instruction in normal mode, ... ?

Thanks

That special 15C will look more or less like this, ... don't bother with traces of an old chrono/timer program used for building it

Hello Pekis,

The HP15C PUSH all return address from a GSB instruction and stops when the dedicated stack is full
So a RTN instruction POP an address and this releases a level
The HP15C has the particularity of conserving all its context after passage in OFF mode
Probably it keeps all again on error (i doesn't make the test), but without acknowledging the error!

Did someone test it ?

Keep yourself healthy!

Laurent