User manual AOPEN AX6BC

[. . . ] AX6BC User's Guide Printed in Taiwan PART NO. : 49. 87822. 081 DOC. NO. : AX6BC-1-E9904E AX6BC Mainboard User's Guide Document Number Model and revision Manual version Release Date : AX6BC-1-E9811D : For AX6BC rev 1. xx : English, rev D : Nov 23, 1998 More help for latest information: Taiwan USA http://www. aopen. com. tw http://www. aopen-usa. com http://www. aopenusa. om http://www. aopenamerica. com Europe http://www. aopen. nl Copyright Copyright © 1998 by this company. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, manual or otherwise, without the prior written permission of this company. ii Disclaimer This company makes no representations or warranties, either expressed or implied, with respect to the contents hereof and specifically disclaims any warranties, merchantability or fitness for any particular purpose. Any software described in this manual is sold or licensed "as is". [. . . ] If you find any unstable 8-bit I/O card, you may try to extend the I/O recovery time via this item. If set to NA, the chipset will insert 3. 5 system clocks. Chipset Features 16 Bit I/O Recovery Time 1 2 3 4 NA 16 Bit I/O Recovery Time The same as 16-bit I/O recovery time. This item lets you specify the recovery time for the execution of 16bit I/O commands by count of ISA bus clock. If you find any of the installed 16-bit I/O cards unstable, try extending the I/O recovery time via this item. If set to NA, the chipset will automatically insert 3. 5 system clocks. Chipset Features Memory Hole At 15M-16M Enabled Disabled Memory Hole At 15M-16M This option lets you reserve system memory area for special ISA cards. The chipset accesses code/data of these areas from the ISA bus directly. Normally, these areas are reserved for memory mapped I/O card. Chipset Features Passive Release Enabled Disabled Passive Release This item lets you control the Passive Release function of the PIIX4E chipset (Intel PCI to ISA bridge). This function is used to meet latency of ISA bus master. Try to enable or disable it, if you have ISA card compatibility problem. 3-13 AWARD BIOS Chipset Features Delayed Transaction Enabled Disabled Delayed Transaction This item lets you control the Delayed Transaction function of the PIIX4E chipset (Intel PCI to ISA bridge). This function is used to meet latency of PCI cycles to or from ISA bus. Try to enable or disable it, if you have ISA card compatibility problem. Chipset Features AGP Aperture Size (MB) 4 8 16 32 64 128 256 AGP Aperture Size (MB) This item lets you determine the effective size of the AGP Graphic Aperture. Chipset Features Pentium II Micro Codes Enabled Disabled Pentium II Micro Codes The micro codes are used to fix bugs of Pentium II CPU, we strongly recommend to enable this item for system reliability reason. However, this microcode may slightly reduce CPU performance. We provide this option for your convenience if you like to test it. Chipset Features Manufacture Frequency Default Depends on the CPU type Manufacture Frequency Default This item only reminds you of the actual CPU frequency while clearing CMOS or pressing "Home" key. The default setting is 233 MHz, you can modify it to match the actual CPU frequency by using the utility - flash. exe. Chipset Features Clock Spread Spectrum On Off Clock Spread Spectrum This item is used to set clock spread spectrum for EMI testing. Normally, you don't need to change the default setting. 3-14 AWARD BIOS Chipset Features System Frequency 233 MHz 266 MHz 300 MHz 333 MHz 350 MHz 400 MHz 450 MHz Manual System Frequency This item lets you set CPU frequency. If you want to set other value, please choose "Manual " to set CPU clock frequency and clock ratio manually. Chipset Features CPU Clock Frequency 66. 8 MHz 68. 5 MHz 75. 0 MHz 83. 3 MHz 100 MHz 103 MHz 112 MHz 133. 3 MHz CPU Clock Frequency This item lets you set external clock (bus clock). The correct setting may vary because of different CPU products, refer to your CPU specification for more details. Chipset Features CPU Clock Ratio 1. 5 2. 0 2. 5 3. 0 3. 5 4. 0 4. 5 5. 0 5. 5 6. 0 6. 5 7. 0 7. 5 8. 0 CPU Clock Ratio Intel Pentium II is designed to have different Internal (Core) and External (Bus) frequency. This item lets you select the ratio of Core/Bus frequency. The default value is 3. 5x. 3-15 AWARD BIOS 3. 5 Power Management Setup The Power Management Setup screen enables you to control the mainboard green features. See the following screen. Power Management Power Management Max Saving Mix Saving User Define Disabled Mode Min Saving Max Saving Doze 1 hour 1 min Power Management This function allows you to set the default parameters of power-saving modes. Set to Disable to turn off power management function. Set to User Define to choose your own parameters. Standby 1 hour 1 min Suspend 1 hour 1 min HDD Power Down 15 min 1 min 3-16 AWARD BIOS Power Management PM Controlled by APM Yes No PM Controlled by APM If "Max Saving" is selected, you can turn on this item, transfer power management control to APM (Advanced Power Management) and enhance power saving function. [. . . ] Make sure the flat cable matches pin1 of IDE connector and your IDE device. b. c. g. There is display, but can 't enter BIOS Setup. a. For checking if the keyboard works properly, press the <Num Lock> key to enable/disable the Num Lock function, and check if the LED will ON and OFF accordingly. Check if Turbo Switch was released, don 't use Turbo Switch before system boots. [. . . ]