Microprocessors contain at least two primary buses within their architecture. One is the data bus and the other is the ______________ bus.

Memory

Address

School

The central and most used register within a microprocessor is the __________ .

Address register

Accumulator

Program register

The ____________________ is a temporary storage location for data travelling to and from the data bus.

Data register

Program register

Address register

At any given time, the ____________________ holds the next (addr + 1) address to be operated upon in memory.

Program counter

Address register

Data register

The __________________ produces a variety of control signals like operating memory read/write lines, transferring data from buses to registers, and performing other functions that operate the microprocessor.

Controller-sequencer

Data register

Program counter

Retrieving an instruction from memory and decoding that instruction to determine its directives is known as the _______________ .

Fetch phase

Carrying out the directives of an instruction is known as the _______________.

Execute phase

When a program is ran, the fetch/execute cycle repeats until the program is complete and a WAI instruction stops the process.

True

False

An opcode is the hexadecimal machine code for an instruction.

False

True

An instruction (eg. LDAA) can have more than one opcode depending on the addressing mode chosen.

True

False

Which of the following addressing modes finds the 8-bit address of the operand in the memory location following the opcode?

Direct

When conditional branching instructions are used (eg. BNE, BEQ, etc), what register determines if the conditional branch is taken or not?

Condition codes

BRA is a conditional branching instruction.BRA is a conditional branching instruction.

True

False

A programming algorithm can be written that will perform multiplication by repeatedly looping through addition?

True

False

The program counter in the 6800 microprocessor is ____________ bits wide.

Which of the following is NOT a flag in the condition codes register?

Within a program the programmer may set or chose where the stack will be located.

True

False

Which of the following methodologies does the 6800 use for sending and retrieving data from the stack?

Fifo

Lifo

The WAI instruction is an example of an instruction that affects the stack.

True

False

Which of the following registers keeps track of where the top of the stack is located?

stack pointer

Address register

In the 6800 MPU, each accumulator has its own carry flag.

True

False

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