An 8-bit register contains the binary value 2_1001.1100 where the 0^th bit (leas

Question

An 8-bit register contains the binary value 2_1001.1100 where the 0^th bit (least significant) is 0 and the 7^th bit (most significant) is 1. Note the dot (.) is added for readability of the binary value should be ignored. For a) and b) below, determine the 8-bit mask value and final register value after executing the mask: a. AND mask that will clear all odd bits (assume bit-0 is even) b. OR mask that will set bits 5:2 (5 through 2) c. If we needed to force bits 7:6 (7 and 6) to logic high, what mask value and operation would we need to use? For each of the following 8-bit ALU results bytes, identify the value (0, 1) of each status flags (N, Z, C). Assume the first value, before the underscore (_) is the carry bit. a. 0_0000.1111 b. 1_1001.1001 c. 1_0000.0000 Sketch a diagram of components and connections of basic computer architecture. Be sure to include the CPU, memory, I/O devices, and busses. List and briefly describe the functional components within a microprocessor CPU. Consider a microcontroller with a 8-bit data bus and 16-bit address bus. a. How many bytes of data can be individually addressed? b. How many bits of data are in each address? For the data array illustrated on the right: a. What value is located at address 0 times 0.0500? b. What is the address of value 0 times 10?

Explanation / Answer

a). 8-bit mask value = 01010101

final register value after executing mask (bit wise and operation between 10011100 & 01010101)= 00010100

b). 8-bit mask value = 00111100

final register value after executing mask (bit wise "or" operation between 10011100 || 00111100)= 10111100

c).8-bit mask value = 11000000

and we should use "or" mask

final register value after executing mask (bit wise "or" operation between 10011100 || 11000000)= 11011100

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