pTAL Conversion Guide

TAL Standard Routines

pTAL Conversion Guide—527302-002

17-2

$AXADR

$AXADR is a privileged TAL routine for which pTAL has a privileged built-in routine

with the same name but slightly different behavior.

$AXADR converts a standard address or a relative extended address to an absolute

extended address.

variable

is the identifier of a simple variable, pointer, array element, structure, or structure

data item; otherwise:

If variable is a pointer, $AXADR returns the absolute extended address of the item

to which the pointer points, not the address of the pointer itself.

Do not depend on:

•

The format of the bits returned by $AXADR

•

An absolute address being a negative value

$BOUNDS

$BOUNDS is a privileged TAL routine for which pTAL has nothing similar.

$BOUNDS checks the address of an actual parameter passed to a reference

parameter of a system procedure. $BOUNDS prevents a system procedure from using

a pointer whose address references system data.

param

is an INT reference parameter declared in the procedure that calls $BOUNDS.

param cannot be a parameter to a subprocedure.

Note. The EpTAL compiler does not support this routine. (The EpTAL compiler does allow

$AXADR as a DEFINE name.)

TAL Compiler pTAL or EpTAL Compiler

Issues a warning Reports an error

( )$AXADR

VST116.vsd

variable

$BOUNDS ( param , count )

VST014.vsd