81. Name a processor which is used in digital audio appliances.
A. 8086
B. Motorola DSP56000
C. 80486
D. 8087
Answer: B
Motorola DSP56000 is a powerful digital signal processor which is used in digital audio applications which have the capability of noise reduction and multi-band graphics whereas 8087 is a coprocessor and 80486 and 8086 are microprocessors.
82. How many bits does the DSP56000 processor have?
A. 8
B. 16
C. 24
D. 32
Answer: C
In order to increase the resolution, DSP56000 is a 24-bit data word processor.
83. How many buses did DSP56000 possess?
A. 2
B. 3
C. 4
D. 5
Answer: B
It possesses three separate external buses, one is for the program and the remaining two buses are for X and Y memories for data.
84. Which of the following architecture does DSP56000 possess?
A. Harvard
B. von Neumann
C. CISC
D. program-stored
Answer: A
DSP56000 possesses Harvard architecture since this architecture has a separate bus for program memory and data memory.
85. What does AAU stand for?
A. arithmetic address unit
B. address arithmetic unit
C. address access unit
D. arithmetic access unit
Answer: B
DSP56000 possesses two external bus switches which one is for data and the other for the address for communicating with the outside world these two switches are reproduced by the internal data bus and AAU.
86. How many address registers does the AAU of a DSP56000 have?
A. 8
B. 16
C. 24
D. 32
Answer: C
Address Arithmetic Unit (AAU) has 24 address registers in three banks of eight.
The AAU is designed to quickly and efficiently calculate an address and store the calculated address in an address register.
87. How many registers does a DSP56000 have?
A. 4
B. 5
C. 7
D. 6
Answer: C
DSP56000 has six 24-bit registers for controlling the loop counts, operating mode, stack manipulation, and condition codes.
88. Which of the following bits are used for sign extension in DSP56000?
A. upper 8 bits of the stack pointer
B. lower 8 bits of the stack pointer
C. lower 8 bits of the program counter
D. upper 8 bits of the program counter
Answer: D
The DSP56000 has a 24-bit program counter in which the upper 8 bits are only used for sign extension.
89. How many bit register sets does the RISC 1 model use?
A. 138 × 24
B. 138 × 32
C. 69 × 16
D. 69 × 32
Answer: B
RISC 1 model is developed in the 1970s and uses a large register set of 138 × 32 bit. These are arranged in eight overlapping windows which have 24 registers each and these windows are split so that six registers can be used during function calls.
90. Which of the following processor commercializes the Berkeley RISC model?
A. SPARC
B. Stanford
C. RISC-1
D. RISC
Answer: A
The Berkeley RISC design was developed between the years 1980 and 1984 and later on, the RISC design was commercialized as a SPARC processor.
