7 sap1
7 : sap1
- Author: alex
- Description: sap1cpu
- GitHub repository
- Open in 3D viewer
- Clock: 1000000 Hz
How it works
SAP-1 CPU
- It is an accumulator based CPU that is purposely made very simple (hence the name, Simple As Possible)
- I would've liked to added input but I thought I wouldn't have enough space on my tile for the extra hardware necessary - turns out I did but I didn't have enough time to implement it!
- Therefore the internal storage is ROM so it does run a program but you cannot change it
How to test
Enable the project and reset to ensure initial state, LEDs should light up like this: 00001110, which is 14 in decimal
External hardware
Eight LEDs on the output pins
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | out_reg_bus_out[0] | ||
| 1 | out_reg_bus_out[1] | ||
| 2 | out_reg_bus_out[2] | ||
| 3 | out_reg_bus_out[3] | ||
| 4 | out_reg_bus_out[4] | ||
| 5 | out_reg_bus_out[5] | ||
| 6 | out_reg_bus_out[6] | ||
| 7 | out_reg_bus_out[7] |