
  VAR
    block_info: [XREF] ^bat$block_info,
    file_instance: [XREF] ^bat$task_file_entry,
    gfi: [XREF] ^bat$global_file_information,
    close_file_on_exit: [XREF] boolean,
    global_layer_number: [XREF] amt$fap_layer_number,
    operation: [XREF] amt$fap_operation,
    rhl: [XREF] 0 .. amc$maximum_block - 1,
    state_info: [XREF] ^bat$labeled_tape_state_info,
    tape_descriptor: [XREF] ^bat$tape_descriptor,
    tai: [XREF] ^fst$tape_attachment_information;
