[comp.sys.handhelds] Beta Vectored Enter

mgaylord@nike.calpoly.edu (Malcolm G Gaylord HP48SX) (05/20/91)

Can someone tell me how the Beta vectored enter works and what it
is used for?

I understand how to use the Alpha vectored enter, but the Beta mystifies
me.  If I store a null program in 'BENTER' (where B is actually the beta
symbol) and turn on the user keys, it seems to be trying to create 
algebraics.  After the algebraic is a null string.  What gives??

Thanks in advance.

Malcolm
mgaylord@eros.calpoly.edu

mgaylord@nike.calpoly.edu (Malcolm G Gaylord HP48SX) (05/22/91)

Can someone please explain what the beta vectored enter is for.
I have used the alpha vectored enter, but the beta mystifies me.

If I store  a null program in 'BENTER' where B is actually the beta
symbol and turn on the user keys I get strange results.  It seems to
try to make algebraic objects out of everything entered, but a null string
is also added to the stack.  What gives??

Thanks in advance.
malcolm
mgaylord@eros.calpoly.edu

NORM%IONAACAD.BITNET@CUNYVM.CUNY.EDU (Norman Walsh) (05/22/91)

The \GaENTER program allows you to look at the stack after Enter has
been pressed (explicitly or implicitly).  \GbEnter allows you to look
at the stack after the operation has been performed and tells you what
operation was performed (that's null string -- you must have just hit
Enter).  If you have the STKV utility, try out these two little vectored
enter programs:

\GaENTER
\<< "\GaENTER" STKV DROP OBJ\-> \>>

\GbENTER
\<< "\GbENTER" STKV DROP \>>

They should give you a pretty good feel for what is going on...

                                                          ndw