Reply 100 of 244, by Fagear
I sent him a message again asking for whatever help he can give to us to this project, so let's hope for the best. He did software at Covox if i'm not mistaken, but maybe he can also give us a hand to maybe figure out faster what that GAL is actually doing, or better yet, get the correct logic and be done with it.
Let's hope that he can help us.
At the moment I see some problems:
1) Not enough information about traces under ICs (the same as was for SSI-2001 replica)
2) PAL/GAL with unknown functionality
3) Mounting bracket, once again. With SSI-2001 I've managed to get out with re-designing the board to be compatible with "ESS AudioDrive-like" mounting bracket, because there was one audio output and DB-15 for joystick. With this board it's a different story. We have one output, but we also have two DB-9 for joysticks and those can not be adapted for DB-15.
Variant A: remove those joystick ports and don't bother with DB-9. But how to mount the board? SSI-2001 is hold in place by DB-15 bolted to bracket. Place on this board DB-15 as well and do not connect it anywhere? A little bit dumb. Put a whole PC-joystick schematics on this board as well to get working DB-15? I think it not worth it and a little bit difficult.
Variant B: take some other standard bracket... like for 2 COM-ports. We will manage to get two DB-9 on place and mount the board. But there is no other hole for audio output on that bracket. Remove external audio jack and get only internal 4-pin header?