Dell 6100 User Manual

Also see for 6100: Rack installation Supplemental guide Hardware guide Service manual Installation and troubleshooting guide

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Dell 6100 User Manual Manual pdf 88 page image

B-2 Dell PowerEdge 6100/200 System User’s Guideas one of the built-in ports, without having to reconfigurethe card. When the computer detects the duplicate serialport on the expansion card, it remaps (reassigns) the built-in port to the next available port designation.Both the new and the remapped COM ports share thesame interrupt request (IRQ) setting, as follows:COM1, COM3: IRQ4 (shared setting)COM2, COM4: IRQ3 (shared setting)These COM ports have the following I/O addresssettings:COM1: 3F8hCOM2: 2F8hCOM3: 3E8hCOM4: 2E8hFor example, if a technician adds an internal modem cardwith a port configured as COM1, the computer then seeslogical COM1 as the address on the modem card. Itautomatically remaps the built-in serial port that was des-ignated as COM1 to COM3, which shares the COM1IRQ setting. (Note that when you have two COM portssharing an IRQ setting, you can use either port as neces-sary but you may not be able to use them both at the sametime.) If you install one or more expansion cards withserial ports designated as COM1 and COM3, the corre-sponding built-in serial port is disabled.Before adding a card that remaps the COM ports, checkthe documentation that accompanied your software tomake sure that the software can be mapped to the newCOM port designation.To avoid autoconfiguration, the technician may be able toreset jumpers on the expansion card so that its portdesignation changes to the next available COM number,leaving the designation for the built-in port as is. Alterna-tively, the technician can disable the built-in portsthrough the system setup program (see Chapter 4) orthe system configuration utility (see Chapter 5). Thedocumentation for your expansion card should providethe card’s default I/O address and allowable IRQ settings.It should also provide instructions for readdressing theport and changing the IRQ setting, if necessary.The built-in parallel port has autoconfiguration capabilitythrough the system setup program. That is, if you set theparallel port to its automatic configuration and add anexpansion card containing a port configured as LPT1(IRQ7, I/O address 378h), the system automaticallyremaps the built-in parallel port to its secondary address(IRQ5, I/O address 278h). If the secondary port addressis already being used, the built-in parallel port is turnedoff.For general information on how your operating systemhandles serial and parallel ports as well as for moredetailed command procedures, see your operating systemdocumentation.Serial Port ConnectorsIf you reconfigure your hardware, you may need pinnumber and signal information for the serial port connec-tors. Figure B-2 illustrates the pin numbers for the serialport connectors, and Table B-1 lists and defines the pinassignments and interface signals for the serial portconnectors.Figure B-2. Pin Numbers for the Serial PortConnectors5 — 19 — 6