Software and Hardware Infrastructure Concepts

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6. (2 points) Consider the following register and memory values:

Register

Contents

 

Memory Locations

Contents

1

150

 

150

251

2

252

 

151

004

3

250

 

152

250

4

311

 

153

017

PC

320

 

250

313

BR

308

 

251

310

X

198

 

252

008

AC

105

 

310

405

 

 

 

311

151

 

 

 

312

151

 

 

 

313

202

PC is the Program Counter, BR is a Base Register, X is an Index Register, AC is the Accumulator.

 

a. Compute the result of an ADD IMMEDIATE 150 instruction. 

b. Compute the result of an ADD DIRECT 150 instruction. 

c. Compute the result of an ADD INDIRECT 150 instruction. 

d. Compute the result of an ADD REGISTER 4 INDIRECT instruction.

 

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