Searching 4 a sound

Hi guys,
I'm desperately searchin'for a particular sound used in many records during 1989-1990.
I have some example to understand what I'm talking about:
ex1: Todd Terry "a day in the life" http://www.discogs.com/release/8843
the sound of the theme
ex2: Doug Lazy "Let it roll" http://www.discogs.com/release/68920
"let the rhythm pump" http://www.discogs.com/release/6275
Thank you in advance
*****L