Define Intra segment direct addressing mode:
The effective branch address is the sum of an 8- or 16 bit displacement and the current contents of IP. Read more »
‘Microprocessors Interview Questions’ - KyaPoocha.com
Define Based Indexed addressing mode:
The effective address is the sum of a base register and an index register , both of which are specified by the instruction.It is also called as Base related Indexed... Read more »
Define Register relative addressing mode:
The effective address is the sum of an 8- or 16 bit displacement and the contents of a base register or an index register. Read more »
Define Register Indirect Addressing mode:
Effective address of the datum is in the base register BX or an index register that is specified by the instruction. Read more »
Define Register addressing mode:
Datum is in the register that is specified by the instruction E.g : MOV CX,AX (16 bit operand) MOV CL,AL ( 8 bit operand) Read more »
When the Overflow flag is set ?
For addition of 16 bits, this flag is set when there is a carry into the MSB and no carry out of the MSB. Read more »
Write about the auxiliary carry flag used in 8086 ?
It is set if there is a carry out of bit 3 during an addition or a borrow by bit 3 during a subtraction. This flag is used exclusively for BCD arithmetic. Read more »
What is the use of Instruction pointer in 8086 ?
Instruction pointer holds the 16 bit address of the next code byte within the code segment. The value contained in the IP is called effective address or offset.... Read more »
It allows the memory capacity to be 1MB even though the address associated with individual instructions are 16 bits wide. It allows the instruction,data, or stack... Read more »
List the functions of Bus Interface Unit in 8086.
Sends out addresses Fetches instructions from memory Reads data from ports and memory Writes data to port and memory Read more »
List the branch related addressing mode:
Intra segment Direct Intra segment Indirect Inter segment Direct Inter Segment Indirect Read more »
Define Relative based indexed addressing mode:
Relative Based Indexed Addressing Mode : Effective Address is calculated by the sum of 8- or 16 bit displacement and a based indexed address. E.A.= (BX or BP) +... Read more »
Define Direct Addressing mode
A 16 bit offset address of the data memory location is specified with reference to the DS segment starting address. For.E.g MOV [1020H],5020H instruction transfers... Read more »
Define Immediate Addressing.
An 8 bit or 16 bit immediate data follows the instruction. For e.g MOV AX,5020H instruction transfers a word 5020H to the AX register . Read more »
Define Register Relative Addressing Mode.
Register Relative Addressing Mode : The Effective Address is Calculated by the sum of 8- or 16 bit displacement and the contents of a base Register or an index... Read more »