Cards produced by the assembler

Question

Describe the various types of cards produced by the assembler? Elaborate all the types.

Answer 1

A card is a well-situated unit of information, frequently of a variable length. A card might be a statement of a record on drum or tape. The assembler generates four kinds of cards in the object deck:

a) ESDcard (External symbol dictionary): These cards have information regarding all the symbols which are defined and referenced at separate places in the program.

b) TXT (text) card: These cards have the actual object code translated version of the source program.

c) RLD (Relocation and Linkage Directory) card: These cards have information regarding those locations in the program whose contents based on the address at which the program is sited.

d) END card: The END card points out the end of the object deck and specified the beginning address for execution if the assembled routine is the main program.