system.debugger.y

sets a y-trace table entry indicating to display the specified data element, along with its address, each time the data element changes.

If the 'data.reference.specification' is omitted, the 'y' command toggles the function on or off. The current value of the data, stored in aligned words, is kept with the address data, so that the table element size will change with varying sizes of data. A plus (+) character is displayed for each entry successfully entered into the table, until the y-trace table is full. The maximum number of entries is four.