H067030 - System Hangs w/DOS 6.3 and PCI Network Adapters SYMPTOM: IBM PC 300/700 Series and PS/ValuePoint products may exhibit a system hang condition while running a communication program using a PCI network adapter (Ethernet, Token Ring & etc.) in a DOS 6.3 environment. PROBLEM ISOLATION AIDS: The CONFIG.SYS statement calls the DOS EMM386.EXE with a file date earlier than 9-20-1994. FIX: The version of EMM386.EXE that shipped with DOS 6.3 was developed before there were PCI adapters. This version does not take into account PCI Plug 'n Play requirements when making upper memory available. An updated version of EMM386.EXE has been made available to correct this problem. Later versions of IBM PC DOS contain the level of EMM386.EXE which functions with PCI Plug 'n Play adapters. Download D63EMM.ZIP from the IBM BBS at 919-517-0001. The file is located in section #4, Corrective Service Software. This file may also be obtained via the Internet from the IBM PC Company File Library at the following Internet URL: http://www.pc.ibm.com If the failure persists continue normal problem determination procedures to isolate the failing application or FRU.