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_name_18 ( chipset_based_on VARCHAR, retail_name VARCHAR, digital_analog_signal VARCHAR, available_interface VARCHAR )

### Question ###
What is the Chipset based on with a Digital/analog signal of analog, with an Available interface of agp, with Retail name with all-in-wonder 9800?

### Accurate SQL ###

SELECT chipset_based_on FROM table_name_18 WHERE digital_analog_signal = "analog" AND available_interface = "agp" AND retail_name = "all-in-wonder 9800"