The #2842 is a PCI I/O processor with 32 MB of memory which drives PCI IOA adapters on the Model 270 and on the #5075 PCI Expansion Tower. The #2842 can drive up to four IOAs. These IOAs are supported (driven) by the embedded PCI IOP and the #2842 PCI IOP: #2742 Two-Line WAN IOA #2743 1 Gbps PCI Ethernet IOA #2744 PCI 100 Mbps Token Ring IOA #2749 PCI Ultra Magnetic Media Controller #2760 PCI 1 Gbps Ethernet UTP Adapter #2763 PCI RAID Disk Unit Controller #2765 PCI Fibre Channel Tape Controller #2766 PCI Fibre Channel Disk Controller #2768 PCI Magnetic Media Controller #2772 PCI Dual WAN/Modem IOA #2773 PCI Dual WAN/Modem IOA #2793 Two-Line WAN IOA with modem #2794 Two-Line WAN Modem IOA #2817 PCI 155 Mbps MMF ATM IOA #2849 10/100 Mbps Ethernet Adapter #4723 PCI 10 Mbps Ethernet Adapter #4745 PCI 2-line WAN IOA #4746 PCI Twinaxial IOA #4748 PCI RAID Disk Unit Controller #4750 PCI ISDN BRI U IOA #4751 PCI ISDN BRI S/T IOA #4761 PCI Integrated Analog Modem #4778 PCI RAID Disk Unit Controller #4801 PCI Cryptographic Coprocessor #4805 Cryptographic Accelerator #4815 PCI ATM 155 Mbps UTP OC3 #4816 PCI ATM 155 Mbps MMF #4818 PCI ATM 155 Mbps SMF OC3 #4838 PCI 100/10 Mbps Ethernet IOA #9767 Base PCI Disk Unit Controller Maximum: Two in the 270 system unit; three in a #5075 PCI Expansion Tower The #2842 is a Customer Install Feature. Restriction: ATM (#481x), #4750, #4751, #4761 not supported at i5/OS V5R3