So I was looking on Amazon.com and found ti-89s for sale. I saw this add: https://www.amazon.com/Texas-Instruments-89TVSC-CBX-1L1/dp/B0002QKTXK/ref=pd_sbs_op_5 If you read the description, it talks about the calculator having 4gb of DDR memory and intel dual core processors.... This all seems fishy considering none of the other postings say this... so is this all true? Also, how many models of the ti-89 titanium are out there? I've just found the viewscreen one and the non-viewscreen models... any other ones out there? Thanks!