PROGRAMMABLE LOGIC CONTROLLERS (LOOSE PA
PROGRAMMABLE LOGIC CONTROLLERS (LOOSE PA
5th Edition
ISBN: 9781264206216
Author: Petruzella
Publisher: MCG
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Chapter 12, Problem 19RQ
Program Plan Intro

BSL instruction:

  • BSL is the abbreviation for Bit Shift Left.
  • BSL shifts the bit status from a lower address number to a higher address number.
  • First it loads the data into an array, then shifts the data pattern through the array to the left, and finally unloads the last bit of data in the array.

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Explain the operation of POP CX instruction.
(d) The table below shows the ALUcontrol signal of the datapath we discussed in class. Instruction Funct ALU Орсode ALUop ALU action operation field control Iw 00 load word XXXXXX add 0010 Sw 00 store word XXXXXX add 0010 beq 01 branch equal subtract 0110 XXXXXX R-type 10 add 100000 add 0010 R-type 10 subtract 100010 subtract 0110 R-type 10 AND 100100 AND 0000 R-type 10 OR 100101 OR 0001 R-type 10 set on less than 101010 set on less than 0111 You want to add the bne instruction into the datapath, which already includes the required hardware for the instruction. Write out the ALUop for bne and how you can determine whether the bne results in the branch to be taken.
Instruction CLD belongs to Implied addressing and it sets the Carry Flag to one. Select one: True False
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