Slot Machine hardware implementation with LFSR for random slots.
It uses a Linear Feedback Shift Register with 64 degree polynomial and one seed in order to random slots generation. Each slot is represented by 4 bits vector (BCD).
The system consists on: one RandomGeneration module which uses the LFSR, one arithmetic module for prize calculating and the Slot Machine managed by different states.
First we need to init the Machine (nReset - active low), then we can play by inserting new credit (newCredit = 1). The prizes and their several slot combinations are:
| Slot | Prize Type | Prize |
|---|---|---|
| 777 | MAX | 225 € |
| 111 | HI | 25 € |
| 222 | HI | 25 € |
| 333 | HI | 25 € |
| 555 | HI | 25 € |
| x77 | NEAR | 10 € |
| 77x | NEAR | 10 € |
| xx1 | LO | 1 € (refund) |
| xx3 | LO | 1 € (refund) |
| xx5 | LO | 1 € (refund) |
| xx7 | NEAR-LO | 1 € (refund) |
| 0xx | BANK | No Prize |
| x0x | BANK | No Prize |
| xx0 | BANK | No Prize |
Each bet (credit) is 1 €. After endPlay = 1 the slots combination and available prize could be seen. If we win, pay must be '1' before play again. If we gain the refund, no new credits must be inserted to play again.
With the testbench, we play 20 times. Try it!: https://www.edaplayground.com/x/3CcF
Hardware Total Elements (compiling for Cyclone IV FPGAs -with Intel Quartus Prime-):
