Kev, I received the board today. Thanks! Now how do I connect this to my computer? I was expect something with a db-25 connector on the back. Thanks, Joe -----Original Message----- From: Kev [mailto:KKlopp@erols.com] Sent: Tuesday, September 16, 2003 10:26 AM To: techtoolslist@www.flippers.com Subject: Re: [techtoolslist] Understanding memory locations Atari manuals are probably the best for this. Mame is not bad but not always correct. Ultimately you will want to learn binary math & how addressing is done so you can look at a schematic & determine the locations of various hardware yourself. Kev I am having a hard time understanding how memory locations and how registers work,, is their a book or courses that anyone can suggest , no one teaches this any more, I took a digital course at the local collage ,they just touched on this part not enough to really understand and they did not go over memory I want to be able to use my fluke 9010 to trouble shoot these arcade boards,, but when it gives loop info how to trace this back to a chip ,, any help would be great , how did all of you learn this ?????