1a)How do we list the concrete RTN for load relative, "ldr". And The abstract RTN for ldr
2)How to Add a new assembly instruciton to the SRC–an extra-strength add function. Here's the abstract RTN:
add (:= op=11) → R[ra] ← R[rb] + R[rc] + R[c3<11..7>] + R[c3<6..2>]
2a)How can we write concrete RTN by using abstract RTN, and the 1-Bus implementation?