BIOS K7S5A BIOS FAQ
Updated 05/11/02 by Tim B @ OCWorkbench.com
The latest official BIOS version is 021001.
2. What's the latest unofficial/beta BIOS?
The latest Overclocking unofficial/beta BIOS is version 021001.
3. What are the differences between BIOS versions?
This are the release notes for the official BIOS releases:
See here… ECS K7S5A Download Page
4. What BIOS works with the Athlon XP?
Although any of the K7S5A BIOS versions work with the Athlon XP processors, only 010911 (and later) BIOS revisions will correctly recognize and display it as an Athlon XP. I recommend you upgrade your BIOS if you plan on using any of the new processors. Bios’s dated from 020809 support the XP2400+ and XP2600+ processors.
5. What's the password for the 010911 BIOS?
The password for the OCWorkbench 010911 BIOS files is "ocworkbench".
6. How do I flash the BIOS?
Every time the BIOS is flashed there's the risk of something going wrong, and you could end up with a corrupt BIOS. My advice is, that unless you're experiencing some kind of problem, leave the BIOS alone. If you have to upgrade your BIOS, carefully follow the steps below:
The BIOS flash utility is called AMINF333.exe, see the ECS Web Page page for download and alternative guide
7. How do I flash the bios if I have an NTFS drive?
Obviously if you use a NTFS you won't be able place the flash files on the hard drive. You could put them on a floppy disk, but there's always the risk of corruption of the floppy, which is not good. The best solution for most would be to create a CD with the flash files. You'll need a CD burning software such as Easy CD Creator or Nero to burn the image into a CD. Once you burned the CD, use it to boot the machine and then use the utility and files included in it.
8. How do I boot clean?
If you're using DOS,
Windows 9x or Windows ME:
If you're using
Windows 2000 or Windows XP:
9. How do I make a boot disk?
If you're using DOS or
If you're using
If you're using
Windows 2000 or Windows XP:
10. What amiflash version should I use?
Some of the early versions of the overclocking BIOS included a different version of amiflash, named f-010621.exe. It really doesn't matter which one you use, Amiflash version 3.29 or higher works for any of the current BIOS versions.
11. What if I get an error during flashing?
These are the errors most often encountered while trying to flash the BIOS. If you get one of this errors don't panic, your board has not been flash yet, so go ahead and take care of the problem or reboot if you need to.
Amiflash locks up
isn't available. The function will be invalid.
Error 2 - File does
Error 9 - BIOS tag is
12. How do I clear the CMOS?
1. Unplug the power
If that doesn't work (it
should), try adding the following steps:
13. What if I get the error message "CMOS settings wrong.... " when I boot?
This message is normal after you flash the BIOS, press F1 to enter the BIOS setup. Make any needed changes in the settings, then save and exit. Reboot.
14. I flashed the BIOS and now my board is dead, what can I do?
Check to see if the floppy drive light goes on when you power up. If it does, it's your lucky day, there's a 95% chance you can fix it. Follow these instructions:
In another computer,
format a floppy disk under DOS/Windows 9x/ME. Don't use Windows 2K/XP or the
quick format option.
If you live outside the US, in Germany you can try http://www.derpcdoktor.de/ or http://www.segor.de/cih.htm, in The Netherlands http://www.flashBIOS.org/, in France http://electro.proxone.fr/, and in Italy http://www.elma.it/.
15. Why is my 1400Mhz chip detected as 1000Mhz by the BIOS?
This is normal after you install a new processor, flash the BIOS, or clear the CMOS. The reason is the Front Side Bus (FSB) is set to by default to 100Mhz instead of the 133Mhz which your chip is. To change the FSB, go into the BIOS Setup, and then go to "CPU and PnP Setup" menu. Scroll to "CPU/DRAM Frequency" and using Page Up/Down, set the CPU Frequency to 133Mhz.
16. What do all those BIOS settings mean?
S2k I/O Compensation > Is to do with the strength of signal between the S2K bus on the chipset and the cpu, enabling this or disabling can have the effect of allowing you to overclock a bit more or it may have no effect at all.
Memory Termination > Was introduced in the the 020626 BIOS by ECS, and is assumed to be a fix for the ghost memory problem – the mobo thinking it had more ram installed than it did (shows up in the post screen as module 0,1 for example) note: this setting will not appear in the bios itself.
DOS Flat Mode > Is memory addressing under dos, to use the extended memory more efficiently (windows has it "built in"). Dos itself uses a "segmented memory model", i.e. memory is addressed with a segment-address and an offset-address, one of the main reasons that bad functioning programs give "general protection errors". But it was necessary to access the memory in 32 bit mode, rather than dos's initial 16 bit. In a flat memory model, all memory addresses consist of "one piece", rather than the 2 (segment and offset). The result is safer memory addressing, and a possibility to create/run larger programs, since there's more "language" to write the addresses of the memory over the dos's first 64k. (From a reply by Atbo)
PCI IDE Busmaster > This increases the IDE performance under dos using the onboard PCI-IDE ‘controller’, which is particularly useful if you use backup programs such as Norton Ghost or Partition Magic. This setting does haven’t any effect once in windows however as windows uses its own IDE busmastering software.
DRAM Driver Slew > Affects DDR Ram – enable for a small performance increase.
Clk Gen Spread Spectrum > Reduces the EMI generated by the motherboards clock generator. It does this by modulating the pulses so that the spikes of the pulses are reduced to flatter curves. So that it doesn’t interfere with any other electronics in the area. Leave disabled for optimum system stability and performance, enable if you have problems with interference.
For everything you ever wanted to know about BIOS settings, and which ones to use, check this three guides:
1.The Definitive BIOS Optimization Guide at Adrian's Rojak
Pot by Adrian Wang
BIOS Guide at LostCircuits by MS
3. BIOS Survival Guide by Rodrigue and Croucher
18. Which BIOS supports Fast Writes and Sideband Addressing?
AGP Fast Writes is supported only by CheepoBIOS’s denoted by an ‘f’ suffix – i.e chb1001f.rom. Sideband Addressing is supported by all BIOS releases.
19. Why are all my devices on the same IRQ?
This is a normal configuration when ACPI is enabled. Most devices will share one IRQ line, usually IRQ 9 or 11. ACPI is an interface for managing power and device configuration. Although it's supposed to make your life easier, the reality is that ACPI causes more problems than it solves. A lot of PCI cards do not share interrupts well under ACPI, especially video cards, causing sound to skip, games to crash, and other unpredictable problems. My advise is that if everything works fine with ACPI, leave it alone, but if you're having problems disable it and reinstall the OS.
20. How can I disable ACPI?
Depending on your scenario, there's different ways of going about disabling ACPI.
To disable ACPI in the
BIOS before you install any operating system:
To disable ACPI under
Windows 2000 or Windows XP install:
To disable ACPI after
Windows 2000/XP is installed.
1. Go to Device Manager
and select Computer -> Properties of ACPI PC
Be aware that when
Windows 2000 restarts it'll redetect most of the hardware in your machine again
and reassign IRQ's to devices.
21. How can I enable ACPI?
There's two parts to a ACPI system, the BIOS and the operating system with support for ACPI. To enable ACPI on the BIOS, go to the BIOS setup and then to the "Power Management Setup" menu. Set "ACPI Aware O/S" to yes by using Page Up/Down. Then install the OS of your choice.
If for whatever reason the OS does not recognize the ACPI support automatically, you force it to, please read The ACPI FAQ for details.
22. Which BIOS chip does the K7S5A use?
The K7S5A boards ships with the Winbond 49F002U. The early boards, ship with the PLCC-32 "square" version of the chip, part no. W49F002UP12B. The newer boards have been fitted with the DIP-32 "rectangular" version, part no. W49F002U12BN. If you're a new technical info addict, you can read the W49F002U Datasheet.
23. Can I use AMIBCP to modify the BIOS?
You can use AMIBCP 7.5 to enable ‘hidden’ options within the bios – most of which however have already been unhidden by Cheepoman in his Overclocking BIOS’, it can also be used to insert your own startup logo.
24. Can I use the K7S5A2 BIOS on the K7S5A?
You should not use the K7S5A2 BIOS on the K7S5A motherboard. Although this boards are similar, they are not the same. Don't do it.
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