1. Johnson's counter For a twisted ring counter of 8-bits, if the time-zero value reads 0xCC, what does the counter read, after 23 clocks? Pick ONE option 0xCC 0x33 0x67 0xA8
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The initial value is 0xCC. The binary representation of 0xCC is 11001100. Show more…
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Suppose the memory cells at addresses 00 through 0 D in the machine described in Appendix C contain the following bit patterns: $$\begin{array}{cc} \text { Address } & \text { Contents } \\ 00 & 20 \\ 01 & 04 \\ 02 & 21 \\ 03 & 01 \\ 04 & 40 \\ 05 & 12 \\ 06 & 51 \\ 07 & 12 \\ 08 & \text { B1 } \\ 09 & 0 \mathrm{C} \\ 0 \mathrm{A} & \text { B0 } \\ 0 \mathrm{B} & 06 \\ 0 \mathrm{C} & \text { C0 } \\ 0 \mathrm{D} & 00 \end{array}$$ Assume that the machine starts with its program counter containing 00 a. What bit pattern will be in register 0 when the machine halts? b. What bit pattern will be in register 1 when the machine halts? c. What bit pattern is in the program counter when the machine halts?
Problem 1. Answer the following questions with reference to the up/down-counter program shown in Figure 8-41. Assume that the following sequence of events occurs: Input C is momentarily closed, 20 on/off transitions of input A occur, and 5 on/off transitions of input B occur. As a result: a. What is the accumulated count of counter CTU? b. What is the accumulated count of counter CTD? c. What is the state of output A? d. What is the state of output B? e. What is the state of output C?
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