•Any
location on general purpose RAM can be accessed freely using direct or indirect addressing modes.
E.g., MOV A, 5FH ;contents of 5FH location will be
loaded in A
E.g., MOV R0, #5FH ; value 5FH will be loaded in
register R0
MOV A, @R0 ; data will be loaded in A which is pointed ; at by
R0
•
•Powerful
feature that bits can be set, cleared, ANDed, ORed, etc. with a single instruction
E.g., SETB 67H ; to set bit 67H
Most microprocessors will do
like
MOV A, 2CH ; read entire
byte
ORL
A, #10000000B ; set MSB
MOV 2CH, A ; write back entire
byte