The Calculator, part 1

I have decided to make a homemade calculator.  You may have seen my other blog, The Hack Minimax, where I am making a computer.  This is totally separate and being done for a different reason.

The calculator will be based around the MSP-430 Value Line series of products, mainly because I already have the TI Launchpad.  All other glue logic will be done with 4000 series parts, a nice complement to my 7400 series computer.  I am currently preparing to order the components.  For now, here are some specs:

• Only integers can be entered
• A three-digit display
• 4 functions: add, subtract, multiply, and divide
• 16 buttons

Here is a list of the parts:

• The microcontroller
• 1 4043 (RS Latch)
• 1 4009 (Hex inverter)
• 2 4532s (Priority encoders)
• 3 4511s (Display drivers and latches)