
In all the years I've been hacking around with hardware stuff, I have only discovered two golden rules for hardware design. Inside every device is some magic smoke which makes the device function. As long as you don't let this magic smoke out everything will work fine, however in all the cases where I have inadvertanly let this magic smoke escape, the device ceased to function. Please remember the following two rules:
1) Don't let the magic smoke out.
2) Don't let rule one scare you.

Okay, were going to turn the Amiga on now, if it doesn't work first time don't panic. No one so far has blown an 020 or a 881, and no one so far has done any damage to their Amiga. The only damage that has been done so far is someone used .025 square posts to mate the LUCAS board to the AMIGA. This damaged the socket. Once he replaced the socket and replaced those tree trucks with the proper pins his board worked just fine.
If you are really paranoid, use an ohm meter to make sure that there is no short between the 5 volt rail and ground. You should get about 270 ohms.
At this time we are going to put a 74ALS74 in the socket for U9.
So, turn on the Amiga, and watch the power light on the front of the machine. It should flash five or so times and then stay on. This is the basic test, if it doesn't do this it will never do anything. If you haven't done so already check to make sure all the chips are in the correctly oriented ( Pin #1 in the top left corner as the board is now) (( NOTE!!! IT IS POSSIBLE TO PUT THE 68881 IN INCORRECTLY. THERE IS NO KEY PIN AS THERE IS ON THE 68020. MAKE SURE THE ORIENTATION OF THE 68881 IS THE SAME AS ON THE LUCAS BORAD SILK SCREEN)) NOTE IT DOES NOT HAVE THE SAME ORIENTATION AS THE 020. Also make sure that all the pins are correctly seated. If you still have problems see the IF_PROBLEMS_OCCUR flie or the article as to how to get hold of me.
Now back to the 99% of you who have had no problem so far. The next indication that everything is OK is you will hear the Amiga's little boot song. Don't let the fact that the song is slower disturb you. The cashe hasn't been enabled yet and alot of useless fetches are going on. Next you should see the Kickstart screen. We are now about 70% sure everything is going OK.
Insert the KickStart disk and away we go again. The hardest test that the Lucas board has to pass is putting up the Workbench screen. Just prior to doing this, interrupts are enabled, the 020 cashe is enabled, the 68881 is talked to to see if its there, and the autoconfig stuff happens. If you get to the workbench screen your probably not going to have any futher problems. So insert the Workbench of your choice. Try running the bench marks to see if you are operating at the same level. Run the Mandfast program in the Mandelbrot directory this will verify that the 68881 is working properly. Next connect your peripherals and insure that they work as well.
Something your going to have to do is tune your particular AMIGA to the LUCAS board. This is done with U9. That is why I asked you to buy several different types of 7474. If your operation isn't what it should be try different types of 7474 in the U9 socket. The first to try is a 74LS74. My buddy Eric Haberfellner is convinced that a Texas Instruments 74LS74 works with all configurations he has run into. I contend that the LUCAS board insists on having one piece of unexplained magic. I've tried to fix it but it seems what works for one AMIGA doesn't work for another. The important thing is that so far no one who has bought a LUCAS Board has been unable to get it going. Just play around and have faith. I really do know how the rest of board works and once you get the right chip it is solid as a rock.
Historical Note:
I got in to this U9 mess when I did the board layout. PCAD allows you to switch identical gates or sections of a chip in order to improve the layout. When I gave the command that it was OK to switch gates I forgot that I had 2 74F74 and one 74LS74 on the board and PCAD wasn't going to complain so it switched an F part for an LS part and now we all have to go through this nonsense. I think it sounds better though to say you have to tune your AMIGA to the LUCAS board. It does show how critical the timing for DSACK is, read the article if you want to bored to death about DSACK.
Seriously it isn't a big problem.  

