pTAL Conversion Guide

pTAL Built-In Routines

pTAL Conversion Guide—527302-002

18-54

$WADDR_TO_EXTADDR

$WADDR_TO_EXTADDR converts a WADDR address to an EXTADDR address.

expression

is an expression whose value is a WADDR address.

$WADDR_TO_EXTADDR returns expression converted to an EXTADDR address.

$WRITEPTE

$WRITEPTE writes a segment-page-table entry.

Example 18-39. $WADDR_TO_BADDR Routine

STRING .s;

INT t;

@s := $WADDR_TO_BADDR(@t); !@t is a WADDR address

pTAL privileged procedure No

Can be executed only by privileged procedures No

Sets condition code No

Sets $CARRY No

Sets $OVERFLOW No

Example 18-40. $WADDR_TO_EXTADDR Routine

STRING .EXT s;

INT t;

@s := $WADDR_TO_EXTADDR(@t); !@t is a WADDR address

Note. The EpTAL compiler does not support this procedure.

expression( )

VST692.vsd

$WADDR_TO_EXTADDR

) :abs

$WRITEPTE

( ptetag

, pageframe

VST656.vsd