User manual AOPEN P5TC-AWD

[. . . ] Chapter 3 Award BIOS This chapter tells how to configure the system parameters. You may update your BIOS via AWARD Flash Utility. Important: Because the BIOS code is the most often changed part of the mainboard design, the BIOS information contained in this chapter (especially the Chipset Setup parameters) may be a little different compared to the actual BIOS that came with your mainboard. 3-1 AWARD BIOS 3. 1 Entering the Award BIOS Setup Menu The BIOS setup utility is a segment of codes/routines residing in the BIOS Flash ROM. This routine allows you to configure the system parameters and save the configuration into the 128 byte CMOS area, (normally in the RTC chip or directly in the main chipset). The BIOS Setup Main Menu appears as follows. Tip: Choose "Load Setup Defaults" for recommended optimal performance. [. . . ] 15 Min This option lets you specify the IDE HDD idle time before the device enters the power down state. This item is independent from the power states previously described in this section (Standby and Suspend). 3-19 AWARD BIOS Power Management à Suspend Mode Option Suspend Mode Option Power On Suspend Suspend to Hard Drive You can select suspend mode by this item. Power On Suspend is the traditional Green PC suspend mode, the CPU clock is stop, all other devices are shut off. But power must be kept On to detect activities from modem, keyboard/mouse and returns the system to full power. Suspend to Hard Drive saves system status, memory and screen image into hard disk, then the power can be totally Off. Next time, when power is turned On, the system goes back to your original work within just few seconds. Refer to section 3. 16 "Suspend to Hard Drive" for more information". Power Management à Throttle Duty Cycle Throttle Duty Cycle 12. 5 % 25. 0 % 37. 5 % 50. 0 % 62. 5 % 75. 0 % 87. 5 % Clock Throttling means at the Doze/Standby state, the CPU clock count in a given time (not the frequency) is reduced to the ratio specified in this parameter. For example, a 66MHz CPU clock remains the same 30ns clock period when system goes into Doze/Suspend. The chipset generates the STPCLK (stop clock) signal periodically to prevent CPU for accepting clock from clock generator. If the Slow Clock Ratio is set to 50%, the CPU will only receive 33M clock count in one second. This will effectively reduce CPU speed as well as CPU power. Power Management à VGA Activity Monitor VGA Activity Monitor Enabled Disabled To enable or disable the detection of VGA activity for power down state transition. 3-20 AWARD BIOS Power Management à IRQ 8 Clock Event IRQ 8 Clock Event Enabled Disabled To enable or disable the detection of IRQ8 (RTC) event for power down state transition. OS2 has periodically IRQ8 (RTC) interruptions, If IRQ8 is not set to Disabled, OS/2 may fail to go into Doze/Standby/Suspend mode. Power Management à IRQ [3-7, 9-15], NMI IRQ [3-7, 9-15], NMI Enabled Disabled To enable or disable the detection of IRQ3-7, IRQ915 or NMI interrupt events for power down state transition. Power Management à Power Management à Power Management à Power Management à Power Management à Power Management à Power Management à Primary IDE 0 Enabled Disabled Primary IDE 0 Primary IDE 1 Secondary IDE 0 Secondary IDE 1 Floppy Disk Serial Port Parallel Port These items enable or disable the detection of IDE, floppy, serial and parallel port activities for power down state transition. Actually it detects the read/write to/from I/O or address port. 3-21 AWARD BIOS 3. 6 PNP/PCI Configuration Setup The PNP/PCI Configuration Setup allows you to configure the ISA and PCI devices installed in your system. The following screen appears if you select the option "PNP/PCI Configuration Setup" from the main menu. PNP/PCI Configuration à PnP OS Installed PnP OS Installed Yes No Normally, the PnP resources are allocated by BIOS during POST (Power-On Self Test). If you are using a PnP operating system (such as Windows 95), set this item to Yes to inform BIOS to configure only the resources needed for booting (VGA/IDE or SCSI). The rest of system resources will be allocated by PnP operating system. 3-22 AWARD BIOS PNP/PCI Configuration à Resources Controlled By Resources Controlled by Auto Manual Setting this option to Manual allows you to individually assign the IRQs and DMAs to the ISA and PCI devices. Set this to Auto to enable the autoconfiguration function. PNP/PCI Configuration à Reset Configuration Data Reset Configuration Data Enabled Disabled In case conflict occurs after you assign the IRQs or after you configure your system, you can enable this function, allow your system to automatically reset your configuration and reassign the IRQs. PNP/PCI Configuration à PNP/PCI Configuration à PNP/PCI Configuration à PNP/PCI Configuration à PNP/PCI Configuration à PNP/PCI Configuration à PNP/PCI Configuration à PNP/PCI Configuration à PNP/PCI Configuration à PNP/PCI Configuration à IRQ 3 Legacy ISA PCI/ISA PnP IRQ3 (COM2) IRQ4 (COM1) IRQ5 (Network/Sound or Others) IRQ7 (Printer or Others) IRQ9 (Video or Others) IRQ10 (SCSI or Others) IRQ11 (SCSI or Others) IRQ12 (PS/2 Mouse) IRQ14 (IDE1) IRQ15 (IDE2) If your ISA card is not PnP compatible and requires a special IRQ to support its function, set the selected IRQ to Legacy ISA. This setting informs the PnP BIOS to reserve the selected IRQ for the installed legacy ISA card. Take note that PCI cards are always PnP compatible (except old PCI IDE card). 3-23 AWARD BIOS PNP/PCI Configuration à PNP/PCI Configuration à PNP/PCI Configuration à PNP/PCI Configuration à PNP/PCI Configuration à PNP/PCI Configuration à DMA 0 Legacy ISA PCI/ISA PnP DMA 0 DMA 1 DMA 3 DMA 5 DMA 6 DMA 7 If your ISA card is not PnP compatible and requires a special DMA channel to support its function, set the selected DMA channel to Legacy ISA. This setting informs the PnP BIOS to reserve the selected DMA channel for the installed legacy ISA card. Take note that PCI card does not require DMA channel. PNP/PCI Configuration à PCI IDE IRQ Map To PCI IDE IRQ Map To ISA PCI-Slot1 PCI-Slot2 PCI-Slot3 PCI-Slot4 PCI-Auto Some old PCI IDE add-on cards are not fully PnP compatible. These cards require you to specify the slot in use to enable BIOS to properly configure the PnP resources. [. . . ] If the auto-detected parameters displayed do not match those that used for your drive, ignore them. Type N to reject the values and enter the correct ones manually from the Standard CMOS Setup screen. 3. 12 Save & Exit Setup This function automatically saves all CMOS values before leaving Setup. 3-32 AWARD BIOS 3. 13 Exit without Saving Use this function to exit Setup without saving the CMOS value changes. Do not use this option if you want to save the new configuration. 3. 14 NCR SCSI BIOS and Drivers The NCR 53C810 SCSI BIOS resides in the same flash memory chip as the system BIOS. The onboard NCR SCSI BIOS is used to support NCR 53C810 SCSI control card without BIOS code. [. . . ]