40Hardware InterfacesThe following peripheral interfaces for adapters, options, and drives are supported in the system unit.Table 1-1 System Board Hardware InterfacesItem InterfaceExpansion slotfor I/O adaptercardsThree PCI (peripheral component interconnect) v2.1 compatibleexpansion slots that operate at 33 MHz bus speed. PCI slot 1 canhold a short (175mm) PCI adapter card. PCI slot 2 can hold a PCIadapter card measuring 165 mm in length (or less). PCI slot 3 canhold a PCI adapter card measuring 236 mm in length (or less). Thedesktop model (machine types 2196, 2197 and 6344) only supportlow profile PCI interface. (169mm)Hard DiskDrivesTwo PCI local bus Enhanced IDE v1.0 compatible hard disk driveinterfaces that support PIO mode up to mode 4, DMA 32-bit accessup to mode 2 and Ultra 33 Synchronous DMA up to mode 2 (33Mbytes/sec).CD/DVD-ROMDrive5.25-in. high-performance, forty speed (40X) CD-ROM IDE/AT driveSupport Bootable CD-ROM Format specification version 1.0.Compliant to Audio-CD, Video-CD, CD-ROM/XA, Karaoke-CD, andPhoto-CD (both single and multi-session) format.Diskette Drive AT diskette interfaceVideo Physical interface is compatible with the IBM Personal System/2(PS/2) VGA interface.SiS540, SIS 630 and Intel 810e VGA Onboard.Modem One 56.6 Kbps PCI Plug and Play modem adapter card with data/faxfeatures.(not standard in 6344 and 6345 systems)Audio For 2194 and 6345 systems, use ADI 1881 Codec. All other modelsuse Cirrus Logic 4299 Codec.Pointing device IBM PS/2-compatible mouseKeyboarddeviceIBM PS/2-compatible keyboardSerial port 9-pin connector with RS232D electrical interfaceParallel port Supports SPP (IBM PC/AT, PS/2) compatible, EPP (IEEE 1284compliance), ECP (IEEE 1284 compliance) interface.Game port Game port interface for joystick. It also supports MIDI.Ethernet Port Only 2194 and some 2193 models do not have Ethernet OnboardUSB USB controller integrated in core logic chip set.