BCA Semester 2 – Microprocessor and Comp. Architecture – Unit 4: Microprogrammed Control (10Hrs)

Explain the organization of Microprogrammed Control Unit.

Define control word. Explain the procedure for generating control word for specific operation.

Explain the design and control logic of Accumulator.

Explain the organization of Microprogrammed Control Unit.

Define micro-program? Describe symbolic micro-program for instruction FETCH routine. Explain the organization of micro-program sequencer for control memory with suitable diagram.

What do you mean by instruction mapping? Explain how to convert an instruction code to a microinstruction address.

What is microprogram sequencer? Differentiate between hardwired control unit and microprogrammed control unit.

Define symbolic microprogram. You have a list of data stored at memory location starting at 8050H. The end of the data array is indicated by data byte 00H. Write a program to add the set of readings. Store the sum at 9050 and total carry at 9051H.

Explain Symbolic Microinstruction and microinstruction format.

Explain the steps of Address Sequencing in detail. Draw and explain selection of address for control memory.

Define micro-operation, micro-instruction and micro-program. Write a program to find smallest element among block of data. The length of the block is in the memory location 2310H and block itself starts from memory location 2050H.

Draw the diagram of microprogrammed sequencer for control memory and explain it.