Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_70702 ( "Model" text, "Floating point" text, "Decimal" text, "Byte string" text, "Memory map" text, "Max memory (kwords)" real )

### Question ###
What is the value for the byte string when the memory map, decimal, and floating points are all standard and the max memory is smaller than 512?

### Accurate SQL ###

SELECT "Byte string" FROM table_70702 WHERE "Memory map" = 'standard' AND "Decimal" = 'standard' AND "Floating point" = 'standard' AND "Max memory (kwords)" < '512'