Question about flash rom

[Guest]

Reference my previous post copied below, I thought flash ram would be overwritten when a new bios was 'flashed' into the chip and would begin at the same address as the old bios. Is this incorrect? I looked at the Winbomd site and found the application note at the url copied below. Does the 2.86 library support the initialization sequence noted there? Please let me know if I have the wrong idea about flashram, I am not well versed in that area.

http://www.winbond.com/PDF/sheet/program.pdf

L D Walker
Friday, September 21, 2001 - 10:36 pm
I am having trouble flashing a Winbond 29C020 chip. I get a failure message that shows a memory address and then shows a different value at that location for the rom and ram.

I had the same error message with a Macronix 29F002 until I did a CE (chip erase) and then it flashed okay. The Winbond chip does not allow a chip erase. I have downloaded and am using the latest S4 Windows driver and S4 Library.

Am I doing something wrong? I load the file from my computers hard drive or a: drive to the ram in the S4 and after using the electronic signature to id the chip and 'enter' select 'burn' Keep getting the same error. To the best of my knowledge the chips are good and will display a 'will burn' when tested.

These are chips for motherboard bios files.

I use this S4 for a lot of programming of EEPROMS with never a problem, but have just gotten into the flash rom.

[Guest]

i purchased an s3 and i would like if i can programm the series devices like the 24xx,93xx ,the microcontrollers like 68hc.. ,the pic from microhip pleas