Can Two 8-bit Adders Be Used to Construct a 16-bit 2's Complement Adder?

[rgalvan2]

16 bit 2's complement adder. Due tomorrow!

You are given two adders. Each adder has two 8-bit operand inputs
and a 1-bit carry input. Each adder calculates the sum of the two
8-bit 2's complement operands and the 1-bit carry and outputs an 8-bit
sum and a 1-bit 2's complement overflow bit. Can you use the two
adders to create a 16-bit 2's complement adder? If so, draw it (represent
the adders as boxes with clearly labeled inputs and outputs). If not,
explain why it is difficult.

Help please

 

[MATLABdude]

Yes. The drawing and wiring are left as an exercise to the student :-)

HINT:
1) What happens to the 10s place when you add 15 and 27? What happened to the 1s place?
2) What is the purpose of the carry INPUT?