Discuss about an indirect addressing mode

Indirect addressing mode:

Indirect addressing mode

•           Memory cell pointed to by address field contains the address of (pointer to) the operand.
•       Ea = (A)

-Look in A find address (A) and look there for operand.

•            e. g ADD(A)

-Add contents of cell pointed to by contents of A to accumulator.

•             Large address space,
•         2^n where n = word length
•         May be nested, multilevel, cascaded

-e. g. EA = (… (A) …)

•             Multiple memory accesses to find operand.
•         Hence slower.