I need a source for free online historical U.S. stock market quotes on
mid and large cap companies dating from 1989 to present. They must be
in table or spreadsheet format. The quotes must be split adjusted but
*not* dividend adjsted.

This is not acceptable:  http://finance.yahoo.com/q/hp?s=MSFT because: 
1) the "close" price column is is not split adjusted, 
2) the "adjusted close" price column is split adjusted.

Again the table must be split adjusted, but not dividend adjusted.