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This problem involves the design of a parallel adder-subtracter for 8-bit numbers expressed in sign and magnitude notation. The inputs X and Y are in sign and magnitude, and the output Z must be in sign and magnitude. Internal computation may be done in either 2's complement or 1's complement (specify which you use), but no credit will be given if you assume the inputs X and Y are in 1's or 2's complement. If the input signal Sub = 1, then Z = X - Y, else Z = X + Y. Your circuit must work for all combinations of positive and negative inputs for both add and subtract. You may use only the following components: an 8-bit adder, a 1's complementer (for the input Y), a second complementer (which may be either 1's complement or 2's complement-specify which you use), and a combinational logic circuit to generate control signals. (Hint: -X + Y =- (X - Y). Also generate an overflow signal that is 1 if the result cannot be represented in 8-bit sign and magnitude.)
(a) Draw the block diagram. No registers, multiplexers, or tristate busses are allowed.
(b) Give a truth table for the logic circuit that generates the necessary control signals. Inputs for the table should be Sub, Xs, and Ys in that order, where Xs is the sign of X and Ys is the sign of Y.
(c) Explain how you would determine the overflow and give an appropriate equation.
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Design an 8085 microprocessor system that has a total of 4Kx8 EPROM space using a single 4Kx8 chip and a total of 4Kx8 RAM using two 2Kx8 chips. The EPROM should be mapped starting at address 0000 hex
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The target will be destroyed if the bomb falls within a tenth of a mile on either side of the center. Find the probability that the target is destroyed if the bomb falls randomly along the line.
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a) construct a moore state table for a sequential circuit that has an input (x) and an output (z). the output is the sameas the input was two clock periods previously. for example x = 0 1 0 1 1 0 1 0 1 1 0 1 0 0 0 1 z = 0 0 0 1 0 1 1 0 1 0 1 1 0 ..
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AC power supply is provided to our homes from grid station, but there are many home appliances that are operated by DC.Justify how they will operate while AC main supply is provided but we have needed DC to operate them.
A circuit has 4 resistors in Series, R1, R2, R3, R4. Each Resistor is 0.012 Ohms. With a Source Voltage of 12 Volts, what is the power dissipated at R3
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