What is the advantage of using queue in 8086?
Answer: Improve The 8086/8088 instruction queue is a buffer that holds opcode bytes that have been prefetched by the bus interface unit. This speed up operations of the processor by helping to reduce fetches latency, i.e. to improve the probability that an opcode byte fetched by the processor is already available.
What are the advantage of instruction queue?
This is a process to speed up the processor. A subtle advantage of instruction queue is that, as next several instructions are usually in the queue, the BIU can access memory at a somewhat “leisurely” pace. This means that slow-memory parts can be used without affecting overall system performance.
How many 16 bit registers are there in 8086?
14 16 bit registers
Is a 16-bit register for 8085 microprocessor?
The 8085 Programming Model: As we have already discussed in the class, the 8085 programming model includes six registers, one accumulator, and one flag register, as shown in Figure given below. In addition, it has two 16-bit registers: the stack pointer and the program counter.
What is the function of SP register?
The Stack Pointer (SP) register is used to indicate the location of the last item put onto the stack. When you PUT something ONTO the stack (PUSH onto the stack), the SP is decremented before the item is placed on the stack.
What is SP and PC?
This sequence of instruction execution is monitored by the program counter. It keeps track of which instruction is being executed and what the next instruction will be. SP: Stack pointer (SP) is used to point to the top activation record on the run-time stack.
What is the purpose of PC register?
The program counter, PC, is a special-purpose register that is used by the processor to hold the address of the next instruction to be executed. The PLA automatically updates the PC to point to the next instruction during the op-code decode cycle.
What are the function of following register?
Following is the list of some of the most common registers used in a basic computer:
| Register | Symbol | Function |
|---|---|---|
| Data register | DR | Holds memory operand |
| Address register | AR | Holds address for the memory |
| Accumulator | AC | Processor register |
| Instruction register | IR | Holds instruction code |