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The MOS-FET Question

Index:

• Bios Flashing
• Precautions when Flashing (or F&$K I've Hosed My BioS!)
• CPU Soft Menu II

Abit's bios flashing program is called AWDFLASH . You must also download a bios .bin file to use with it.

Flashing instructions:
Make a bootable diskette without any resident programs, it can only have the command.com file. Copy the awdflash.exe and the bh6_xx.bin file (1.0x) or the bh32_xx.bin file (1.1), where xx is the version letters. Boot with the disk, and type at the prompt:
awdflash bh6_xx.bin        (for 1.0x)
awdflash bh32_xx.bin      (for 1.1)
and follow instructions. Reboot by either turning off your computer or the reset button, not ctrl-alt-delete. Don't forget to go into the bios and set everything back up the way you had it.

Bios versions differ by the two-letter combination that identifies the version.

BH6 1.0x:

SS - The current official bios for BH6 1.0x boards. Adds support for Celerons up to 700.

QN -  Fixes ACPI issue with Windows 2000. Also fixes memory capacity problems with Linux. If you are having trouble with the SS bios, try using this.

NV - The previous bios, which some may want, if you're having problems with the QN and the SS bios.

BH6 1.1:

SP - The current official bios for BH6 1.1 boards. Adds support for Coppermines up to 850 and Celerons up to 700.

QM - The previous official bios for BH6 1.1 boards. If the SP bios is giving you trouble, try this one.

• *WARNING* Experienced users only! Please read up on the post at HardOCP (link at the end of this point), and any links from there, so you know what you are doing!!!
  Ok, we all know we don't want to screw up flashing our bios. So, here is a solution if you hose your bios, straight from those extremists in the forums at HardOCP. Apparently there is a part of the bios that is not overwritten by a bios flash. This 'bootstrap' will boot from a floppy and run autoexec.bat. You won't see anything however, unless you have an ISA graphics card ;).
  Here's the deal: get a working bios; make a DOS boot disk with 'format a: /q /u /s'; copy awdflash.exe and the bios file to the floppy; create autoexec.bat on the floppy with 'a:\awdflash a:\bios.bin /PY /SN /CC /CD /R' as the only line, where bios.bin is your bios file. If you flash you bios, but it does not boot afterwards, simply put this disk in, turn the computer on, and it will flash the bios again, and reboot for you. Simple :)
  I've made this easier for you by creating two zip files with the required files in it. The 1.0x file uses the NV bios, while the 1.1 file uses the QM file.
  1.0x -> bh610.zip
  1.1 -> bh611.zip
  Just unzip the file onto a boot disk made using 'format a: /q /u /s' and you have a bios backup. :)
  As a matter of interest, this can also be used with other Abit boards (I think). The original post of this was found here.

CPU Soft Menu II:

CPU Name is: The identification of the processor, eg. 'Intel Celeron MMX'

CPU Operating Speed: This is where you either select the speed of your processor, eg. 366(66), where 66 is the front side bus (FSB), up to currently 700(100); or you select 'User Define' (which most of you reading this will do) and the following options appear.
- Turbo Frequency: adds 3 Mhz to the FSB, is only available at an FSB of 100. Options of 'Enabled' and 'Disabled.' This is only available on the BH6 1.0x boards.
- Ext. Clock (PCI): The frequency of the front side bus, with the pci to fsb ratio in brackets after it. The 1.1 also has a letter after it, N or S, N for general use, and S for spread spectrum modulation, which I was told modulates the frequency to reduce 'noise'.
- Multiplier Factor: The CPU's multiplier. This option is useless, as almost all processors that can be used in this board are multiplier locked. Has options 3.0 - 8.0 in steps of 0.5.
- SEL100/66# Signal: This was used on the old Pentium IIs and the first Celerons to overclock the FSB to 100 instead of 66. Pretty much useless nowadays.
- AGPCLK/CPUCLK: The ratio used to set the AGP frequency. Has options of 1/1 or 2/3. Eg. if the FSB is 100 Mhz, and this ratio is set to 2/3, the AGP frequency will be 2/3 of 100 = 66 Mhz.
- L2 Cache Latency: This supposedly sets the L2 cache latency on the processor, but I am unsure if it does affect the latency. Has options 'Default', 1 - 8.
- Speed Error Hold: This is the option that nags everybody who does not disable it. It is responsible for the 'CPU is unworkable or had been changed.' error when you boot at, for example, a non-cpu-standard FSB like 83.

CPU Power Supply: Sets the voltage to the CPU. Has two options, 'Default' and 'User Define'. When 'User Define' is selected, the 'Core Voltage' setting appears.
- Core Voltage: Manually set the CPU voltage, very useful for overclocking and stabilizing a system if not quite stable at default voltage.

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Questions? Comments? Answers? email me at lukecarroll@optushome.com.au
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