In LC3 the number of generalpurpose registers in the process

In LC-3, the number of (general-purpose) registers in the processing unit is fixed at 8. Can it be increased? Why? Given two following instructions, A and B: What do the instructions A and B do? What are their differences?

Solution

[1] No, Number of general - purpose registers in the processing unit is fixed at 8. But 4 special purpose GR also exists.So we can increased it.

[2]

Instructions A : 0000 111 101 010101

Instructions B : 0100 111 101 010101

(i) Instruction A used fo \"BR\" and Instruction B is used for \"JSRR\".

(ii) OPCODE of both instruction are diffrent.so both having different functionilty.