It does not solve my doubt. I have placed the Sem3040 in its place and ready. It worked.
I do not understand that it does not solve my doubt ... your doubt was: What I want to know is what role it plays, what it is called, and if possible its diagram. Well, you already had it ... now ... that MAP8800 was wrong and changing it to that Sem 3040 ... it worked for you ... it's another;)
You're right. I wanted to know what it is, what it is called and what function it plays, to look for its characters and some equivalent, Then I stressed that I replaced it, but I did it by risking, because I do not know what it is, what it is called or what its function is. I would appreciate clarifying that doubt. Thank you.