warning: DB directive without data in ROM [-Wempty-data-directive]
    at empty-data-directive.asm(6)
warning: DW directive without data in ROM [-Wempty-data-directive]
    at empty-data-directive.asm(7)
warning: DL directive without data in ROM [-Wempty-data-directive]
    at empty-data-directive.asm(8)