FANTASTIC!!!
Now that the machine is working and you have sound maybe play with few hidden features!
Pretty sure that game has the Third Reel Reach feature and ........maybe Super Reach, maybe. And random nudge possible but I doubt it.
It is a memory feature accessed by pressing the test button 14 times. If you do a RAM clear the settings are gone and would need to be reloaded.
Third reel reach is when two 7's land on reels 1 & 2. The third reel spins longer with extra sound.
Super Reach is an even more third reel reach where the reel slows its rpm and different music.
Both are randomly selected and don't always happen. The program uses the R register in the Z80 processor to get the randomness.
Check out this post for instructions;
https://newlifegames.com/nlg/index.php?topic=511.0