when i power it up noting comes, its jus a blank screen, no beeps
i tried clearing the cmos, changed the jumpers, put them back. nothing. i tried again this time waiting a minute or so then puttin the jumper back in the right place....nothing. next i wating 10 minutes....1hr....4 hrs. nothing. any advice ?
The older board has 128KB chip only (W29EE011) - but some of these boards can also support 256KB ones (like the W29C020) - try it and you will see. If you get verification error in half of the chip then it does not support 256KB.
It should be OK. The last write status is not saved anywhere in the chip - it just says if the last write operation you performed in UniFlash was OK or not. You can try older AMIFlash from http://rainbow.ht.st/hardware/hotflash.html. I have successfully flashed one W29C020C with this one although UniFlash didn't work.
Bootblock mismatch means : The Bootblock(Emergency Bios) stored in the Chip is different with the one from the Biosfile . Even if the flash was succesful you'll get Bios ROM Checksum Eoor or no Boot . > Use Uniflash > Advanced Tab > Flash including Bootblock !!