73 Calculator chip
73 : Calculator chip
- Author: Rylan Morgan
- Description: calculator
- GitHub repository
- Clock: 0 Hz
How it works
Basic ALU. Use the input pins to specify an 8 bit number and output pins to view result. IO pin 0 is the enter pin, assert high to enter command/value. IO pins 4-1 are used to select the command for the ALU. IO pins 7-5 are for flags. Ops: 0x0: add 0x1: subtract 0x2: bitwise or 0x3: bitwise and 0x4: bitwise xor 0x5: left shift by 1 0x6: right shift by 1 (logic) 0x7: right shift by 1 (arithmetic) 0x8: 2s compliment negate 0x9: bitwise invert 0xA: reverse bitpatern 0xB: unused 0xC: unused 0xD: unsigned input < output 0xE: unsigned input > output 0xF: input == output
How to test
enter a bunch of numbers and ops, should work great
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | NumIn [7:0] number in | NumOut [7:0] output | OpIn [3:0] what op to run |
| 1 | Reset | Enter enter command | |
| 2 | Clock | Flags [2:0] overflow, negative, and zero flags | |
| 3 | |||
| 4 | |||
| 5 | |||
| 6 | |||
| 7 |