While rounding, the carry can be set during roundUp operation of mantissa. In that case,
the mantissa has to be right shifted. Which implies the radix point should go towards the MSB , increasing the exponent. But rounding unit decreases the exponent instead of increasing it. So patch it.

I have only debugged only until implementing logical and arithmetic circuit seperately. The flags and the overall circuit are yet to be tested.

Please navigate to the second branch and debug the ckt A few days ago a CheckALU was uploaded in the resources group. Test whether the ALU is giving correct output or not.

Also do notify whether the .circ can be viewed properly in your locals.

Try to mention any issues found here asap.

N.B
Use the 7400,circ and IC-7483 I uploaded in main. I have made some changes.

Ai , Ai' and their selections needs a hex inverter and muliplexer IC. Can this be optimized ?

The overflow OF and carry flag CF has to be 0 for logical operations.
To ensure this : -

1. Cin must be 0 for those operations
2. C = 0000 must be selected during logical operations

Although condition 2 is satisfied by the first plan, condition 1 is not.