Looking for UNIX for my 386-AT

[Sui Choy]

  Hi All!
    I'm looking for a UNIX to run on my 386-AT(Gateway 2000 20MHz, 4Meg Ram,65M hardisk)
    Someone mentioned about Microport.
    
    However, I'm a beginner in UNIX, so can someone give me more info about this 
    product. Does it have 'develeoper' with it ? Can it use extended memory 
    or the protected mode of 386 chip ? And what is the price ? 

		       Thanks in advance 

			      Philip  sui at garfield.cs.wisc.edu