Acer Aspire E650 Service Manual

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Contents

Acer Aspire E650 Service Manual Manual pdf 48 page image

38 Chapter 2Onboard FDC ControllerIf your system has a floppy disk controller (FDC) installed on the system board and you want to useit, you can select Enabled. If you install an add-in FDC or the system has no floppy drive, selectDisabled in this field.Onboard Serial Port 1This option is used to assign the I/O address and interrupt request (IRQ) for onboard serial port 1(COM1).UART 2 Mode ControllerThis item allows users to enable or disable the UART2 Mode Controller.UART 2 SelectThis item is available if the Onboard Serial Port 2 is set for any option but Disabled. UART ModeSelect enables you to select the infrared communication, protocol-Normal (default), IrDA or ASKIR.UR2 Dulex ModeThis item is available when UART 2 Mode is set for either ASKIR or IrDA. This item enables you todetermine the infrared function of the onboard infrared chip. The options are Full (default) and Half.Full-duplex means that you can transmit and send information simultaneously. Half-duplex is thetransmission of data in both directions, but only one direction at a time.Onboard Parallel PortThis option is used to assign the I/O address and interrupt request (IRQ) for the onboard parallelport.Parallel Port ModeThis item enables you to set the data transfer protocol for your parallel port. There are four options:SPP (Standard Parallel Port), EPP (Enhanced Parallel Port), ECP (Extended Capabilities Port),and ECP + EPP. SPP allows data output only. ECP and EPP are bi-directional modes, allowingboth data input and output. ECP and EPP modes are only supported with EPP- and ECP-awareperipherals.ECP Mode Use DMAWhen the onboard parallel port is set for ECP mode, the parallel port can use DMA3 or DMA1.