Question

The NEG instruction in MARIE replaces the value in the AC register with its negation in twos complement. For example, if the AC register has the value 0x123, then NEG would store the value 0xFEDD in the AC register. Show the RTN instructions that are used to process the NEG instruction. Include the RTN for fetching as well. See slides for examples. Hint: All of the values that you need are already in registers. No additional fetches are necessary.

Name: the neg instruction in marie replaces the value in the ac register with its negation in twos complement for example if the ac register has the value 0x123 then neg would store the value 0xfe 74698
Uploaded: 2023-10-18T18:42:35-08:00
Duration: 3 min 4 s
Channel: Akash M
Description: the neg instruction in marie replaces the value in the ac register with its negation in twos complement for example if the ac register has the value 0x123 then neg would store the value 0xfe 74698

          The NEG instruction in MARIE replaces the value in the AC register with its negation in twos
complement. For example, if the AC register has the value 0x123, then NEG would store the
value 0xFEDD in the AC register.
Show the RTN instructions that are used to process the NEG instruction. Include the RTN for
fetching as well. See slides for examples.
Hint: All of the values that you need are already in registers. No additional fetches are necessary.

Added by Consuelo D.

Computer Science and Information Technology

Trishna Knowledge Systems 2018 Edition

Instant Answer

Solved by Expert Akash M

10/18/2023

Step 1

Step 2: Load the value from the MAR register into the MBR register. Step 3: Perform the twos complement negation on the value in the MBR register. Step 4: Store the negated value from the MBR register back into the AC register. \textbf{The RTN instructions for Show more…

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The NEG instruction in MARIE replaces the value in the AC register with its negation in twos complement. For example, if the AC register has the value 0x123, then NEG would store the value 0xFEDD in the AC register. Show the RTN instructions that are used to process the NEG instruction. Include the RTN for fetching as well. See slides for examples. Hint: All of the values that you need are already in registers. No additional fetches are necessary.