User manual ACER ALTOS 500

[. . . ] Altos 500 Series User's Guide Document History Copyright Notice EDITION First Edition PART NUMBER 49. AB790. 001 DATE September 1999 Copyright © 1999 by Acer America Corporation. 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, chemical, manual or otherwise, without the prior written permission of Acer America Corporation. Printed in U. S. A Trademarks Acer and the Acer logo are registered trademarks of Acer Incorporated. Altos is a trademark of Acer America Corporation and Acer Inc. . [. . . ] [Enabled ] External Cache . . . . . . . . . . . . . . . . . . . . . . [Enabled ] Cache Scheme . . . . . . . . . . . . . . . . . . . . . . [ Write Back ] Memory at 15MB-16MB Reserved for . . . [System] Memory Parity Mode . . . . . . . . . . . . . . . . . . [ECC] Internal Cache (CPU Cache) This parameter enables or disables the first-level or internal memory, that is, the memory integrated into the CPU. The default setting is Enabled. External Cache This parameter enables or disables the external cache memory. The external cache is incorporated in the CPU module. The default setting is Enabled. Cache Scheme This parameter shows the cache scheme status only as Write-back mode. Writeback updates the cache but not the memory when there is a write instruction. It updates the memory only when there is an inconsistency between the cache and the memory. The default setting in Write Back. Chapter 2 - BIOS Utility 2-29 Memory at 15MB-16MB Reserved for To prevent memory address conflicts between the system and expansion boards, reserve this memory range for the use of either the system or an expansion board. The default setting is System. Memory Parity Mode This parameter allows you to enable or disable the ECC (Error Checking and Correction) feature. The ECC feature enables BIOS to detect and correct data errors. Disable this parameter if you want to disregard the function. The default setting is ECC. Altos 500 Series User's Guide 2. 9. 2 PnP/PCI Options The PnP/PCI Options allows you to specify the settings for your PCI devices. Selecting this option displays the following screen: PnP/PCI Options PCI IRQ Setting . . . . . . . . . . . [ Auto ] INTA INTB PCI Slot 1 . . . . . . . . . . . . . . [Disabled] Graphics Aperture Size . . . . . . . [No ] INTC [--] [--] [--] [--] [--] INTD [--] [--] [--] [--] [--] PCI IRQ Setting Select Auto to let BIOS automatically configure the plug-and-play (PnP) devices installed on your system. Otherwise, select Manual. Refer to your PCI user's manual for any special requirements. Chapter 2 - BIOS Utility 2-31 PCI Slots When you set the PCI IRQ Setting parameter to Auto, these parameters specify the auto-assigned interrupt for each of the PCI devices. If you set the PCI IRQ Setting parameter to Manual, you need to specify the interrupt that you want to assign for each PCI device installed in your system. AGP This item shows the assigned interrupt for the onboard accelerated graphics port (AGP) controller. PCI IRQ Sharing Setting this parameter to Yes allows you to assign the same IRQ to two different devices. To disable the feature, select No. If there are no IRQs available to assign for the remaining device function, we recommend that you enable this parameter. VGA Palette Snoop This parameter permits you to use the palette snooping feature if you installed more than one VGA card in the system. [. . . ] Try enabling Include in BIOS Scan in the SCSI Device Configuration option of the SCSISelect utility. See the section "SCSI Device Configuration". Be sure to cycle the power OFF and ON after changing any values on a SCSI controller, in a Setup program, or on a SCSI device. This ensures that the new initial values are loaded. [. . . ]