Table schema:
CREATE TABLE table_name_19 (decimal VARCHAR, max_memory__kwords_ VARCHAR, byte_string VARCHAR, memory_map VARCHAR)

Question: What is the decimal value when the memory map and byte string are standard, and the max memory is 512?
SQL: SELECT decimal FROM table_name_19 WHERE byte_string = "standard" AND memory_map = "standard" AND max_memory__kwords_ = 512