Design and build the control unit

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Reference no: EM13550960

Given the following specifications for an instruction set to be implemented be some target machine:

1. Show the minimal amount of architecture needed to implement the instructions set.

2. Write the micro-program code that will be used to design and build the control unit.

3. Design and draw, using a straight edge, the control unit. Make sure the control unit is a "one-hot" control unit like discussed in class.

4. In a paragraph or two, discuss the IR and MAR design. Make sure your discussion includes how many bits in each register, what a typical opcode looks like, and how an escape codes you may have work.

5. Describe all control lines needed and how they are connected to the control unit.

Opcode	Mnemonic	Description Loads the accumulator from IR(addr) Store the accumulator into memory Increment the contents of a memory location
0	ACMEM
1	STOM
2	INCMEM
3	SUBAC	Subtract the contents of IR(addr) from accum
4	ADD2	Add two adjacent memory locations Ex. ADD2 10 would add location 10 to 11 and store result in 10.
5	JSR	Jump to subroutine in IR(addr) Do a 2's Compliment negation of data in IR(addr)
6	NEGMEM
7	DEC	Decrement the memory location in IR(addr)
8	CLR	Clear memory location in IR(addr)

INSTRUCTION SET (OPERANDLESS)

Opcode	Mnemonic	Description
0	RET	Return from a subroutine
1	DBL	Integer double the Accumulator
2	SKIP2	Execute the instruction 3 words in advance.
3	HALT	STOP EVERYTHING

If all registers (except the MAR) and memory are 64 bits, how much memory can be accessed with your design? How big is the MAR?

Reference no: EM13550960

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