Bios Password

The work around you have tried will not work by installing another CPU,the bios is not updated to recognize the cpu

The Bios password has to be changed using a jumper or switch on the motherboard,which requires locating the motherboard model number and researching the internet for that particular board.

The bios is not updated so that it can recognize the cpu, just by installing it on motherboard,the 4x cd-rom speed is not reading the cd because it's speed is not compatible,it will take longer to read cd

You can try to locate a manual for your motherboard on motherboards.org. You'll need to find the serial # on the board. Old 486's are jumper boards and the 100mhz processor will run at the default speed set by jumpers on the board [again you'll needthe manual]. Some 486 boards will only handle [regardless of jumpers]33mhz,66mhz processors. Back then, most BIOS's on those old boards weren't flashable. You had to take out the old BIOS and put in a new one [provided the connectors weren't permanently soldered in]. Since this is a 486 and you've loaded DOS, how is your config.sys setup? the UMB Device=[the device like a CD rom] config.sys command line syntax will loads drivers into upper memory to conserve conventional memory [memory below 1 MB, {really 640K}. If not configured right, you won't have enough free conventional memory to run your programs.

The answers you have been given are correct.

Unless you can identify the make and model of the motherboard, it will just be good guessing as to how to set the jumpers.

Good resources to identify motherboards include:
www.motherboards.org
www.wimsbios.com

However, if this was an OEM motherboard, you need to identify the original PC it was in in order to find a manual.

Next, I stronly advise against running Windows 98 on a system so close to the minimums.
You will actually get significantly better performance if you install Windows 95 instead.

My rule of thumb, is to not install an OS unless the system has 2X the minimum required resources.

In fact, I don't install W98 on systems with less than a PII 350MHz CPU.
A Pentium 233MHz MMX system runs a good 10% slower with W98 installed as compared to W95.

Chas

If you don't like the answers above than throw that PC in the garbage.

You are at your own risk for the following websites and linked utilities.

They may work, or they may damage the BIOS.

http://www.simtel.net/pub/pd/12073.html

http://www.dewassoc.com/support/bios/bios_password.htm

Remove any spaces from the pasted links.

I do recall a few motherboards that required a setup floppy to perform some system setup tasks.

Still, I would be surprissed if the motherboard has the CPU speed settings in BIOS.
I believe that the first time I saw that was on PII's, and Athlon CPUs.

For a DX4 100 CPU, you set the clock to 25MHz, and the chip itself takes care of the 4X multiplier.

Note: Many 486 motherboards were built to only use a specific speed CPU.

As stated previously, you are best off trying to determine that make and model of this motherboard, and getting a manual for it.

Alternately, you can find running Pentium systems for under $50 at many web sites.

Chas

Sometimes I think people ask questions just to reject answers. All of us have given this guy honest,accurate, information and advise on a computer that many today haven't a clue as to how it was built, and what will and will not work with those old computers.

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