Date: Mon, 8 Sep 2003 22:21:59 -0500 (CDT) From: Yale Patt To: ee360n-15280@sunfire2.ece.utexas.edu Subject: another student.... hi i was writing an email to you when you wrote this email. JSRR R1 would be an example of a register indirect mode.. as R1 has the address of an operand in memory.. am i right to think so? Yes. another question is that "computer organization" by Hamacher et. al states that index addressing is the mode in which the effective address is calculated by adding an offset to the contents of an index register. is this mode "base+offset" mode? Yes. thank you very much You are welcome. Yale Patt <>