KNOWN CPU BUGS--80386

Some 386DX 16MHz Intel processors had a small bug which appeared as a software problem. The bug occurred when running true 32-bit code in a program such as within OS/2 2.x, Unix/386, or Windows in Enhanced mode. The bug would cause the system to lock up and is a difficult issue to determine without having Intel actually look at the chip. Chips that passed the test, and all subsequent chips which were bug-free, were marked with a double-sigma symbol. 386DX chips that are not marked with either of these symbols may have not been tested by Intel and may be defective.