getPackedExtendedAttrAt
Returns the extended packed cell attribute word at [col, row].
Out-of-bounds column probes return the active extended pen word. Decode this value together with getPackedAttrAt via io.github.ketraterm.core.codec.AttributeCodec.
Return
Extended packed attribute word for the cell or active pen.
Parameters
col
Column index (0-based).
row
Row index (0-based).