Hello!
I need to implement a set greater than and a branch less or equal in my 16 bit ALU design,but I'm having many difficulties.
I know that in a set greater than a>b equals a-b>0 ,but I don't know how to work out from that and implement it in my design(which type of gates to use and that).
The same happens with branch less or equal.I already have a branch equal,but I don't know how to use it in order to get a ble.
Any help is really appreciated!
Jump to PostTypically you run the calculation through the ALU and then examine the overflow and carry flags in your branch logic.
Typically you run the calculation through the ALU and then examine the overflow and carry flags in your branch logic.
The 7485 compares two 4-bit numbers, and tests if one is larger, smaller or equal to the other. The logic diagram is shown in the datasheet.
http://www.cs.smith.edu/~thiebaut/270/datasheets/sn74ls85rev5.pdf
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