How many memory locations can be addressed by a microprocessor that uses 24 bit addressing?

Answer: Aroun 16 Kilo Bytes of memory locations can be addressed. You can calculate the number of memory locations by using this formula: No. of Memory locations = 2^n, where n = number of address lines.

How many memory location can be addressed by a microprocessor with 12 address lines?

A 64-bit (8 byte) wide memory could address 32768 bytes. A row and column addressed 64 bit wide DDR DRAM with 8 byte bursts and 12 address bits could address 4 Gigabytes (8 bits of “address” for the block size, plus 12 for the row and 12 for the column gives 32 bits.)

How many memory locations can 8085 microprocessor address?

65536 memory locations

How many memory locations can the 8085 Access if it has a 20 bit address bus?

Address Bus − 8085 has 16-bit address bus while 8086 has 20-bit address bus. Memory − 8085 can access up to 64Kb, whereas 8086 can access up to 1 Mb of memory.

How many bits are used to address a memory location?

32 bits

What is the purpose of Biu?

BIU (Bus Interface Unit) BIU takes care of all data and addresses transfers on the buses for the EU like sending addresses, fetching instructions from the memory, reading data from the ports and the memory as well as writing data to the ports and the memory.

Why do we use 6 byte queue in 8086?

Hence the instruction queue is 6 bytes so that it can accommodate the longest instruction. longest instructions can be possible upto 6 bytes hence instructions queue has size of 6 bytes in 8086 and queue will be filled when it has 2 bytes empty because 8086 has 16 bit data bus so it can fill queue in one cycle.

Which instructions set and clear the direction flag?

Clear Direction Flag (cld)

Operation. 0 -> DF.
Description. Clears the direction flag; affects no other flags or registers. Causes all subsequent string operations to increment the index registers, (E)SI and/or (E)DI, used during the operation.
Example. Clear the direction flag: cld.

Which of the following is used to clear the direction flag?

CLD CLears the Direction flag, data goes onwards. STD SeTs the Direction flag, data goes backwards.

Under which circumstance direction flag will be set in 8086 microprocessors?

The flag bits are changed to 0 or 1 depending upon the value of result after arithmetic or logical operations. 8086 has 16-bit flag register, and there are 9 valid flag bits….Status Flags.

Flag Bit	Function
O	The overflow flag is set to 1 when the result of a signed operation is too large to fit.