On Mon, Nov 20, 2006 at 03:41:47PM +0100, Shaddam Corrino IV wrote:
Is there some sort of memtest86 for eeproms?
I got an W29C020C-90B and an W29C020-12 for about total $10.
If I'm reading datascheets correctly the first one has about 1k cycles and second one has about 10k cycles.
Sounds about right, although 1k is a bit low.
They have one week warrany on them so I would like to test them if they are free of errors even if the 440bx is not ready for prime time. Is there some easy way to do this?
If they're new I wouldn't worry, if they're used and haven't failed yet there's no way to tell how many cycles are left unfortunately.
But you can test that they actually work right now.
It's a good idea to mark your chips somehow so they don't get mixed up.
1. Boot your system with the normal BIOS. 2. Run: flashrom -r original.bin 3. Email original.bin to self. 4. Remove your original flash chip while the board is powered. Put one of the new chips in. Observe polarity! There's a notch on one end of the package. 5. Run: flashrom -wv original.bin 6. If the write+verify works you should be able to reboot with the new chip working as your BIOS.
Repeat for each chip.
//Peter