I dont know why those sellers dont check their chips before sending them out, but now Í have to open Paypal dispute
I dont know why those sellers dont check their chips before sending them out, but now Í have to open Paypal dispute
Maybe AMD started to buy from Fairchild or National? Also, I don't think there is a real difference, why not just use them?
I dont know, but if i try to reprogram the chips as FM27C040 or NM27C040, then I get this error and have to run them through a "Eprom Eraser" for 40 min before they are blank and that sucks!.
I dont know, but if i try to reprogram the chips as FM27C040 or NM27C040, then I get this error and have to run them through a "Eprom Eraser" for 40 min before they are blank and that sucks!.
Yeah, that sucks. What happens if you try to program them as AMD?
The first not FF byte in the file is at 4000, so I guess that programming fails from the start but it is not noticed because an empty eprom contains FF anyway.
Does your programmer work at all on other eproms?
Another interesting observation is that the programming did something, as the software conclude "not empty", when I do a blank check after the error.
Another interesting observation is that the programming did something, as the software conclude "not empty", when I do a blank check after the error.
That is strange because it fails to program the first byte that needs to be programmed as far as I can see.
Can you find out what address is no longer set to FF?
So when programming it says it fails on the first (non-FF) byte which stays at FF, but when you do a blank check it shows that it programmed the first correctly...
There must be something wrong in the protocol that the programmer uses, like the chip needs a longer delay between programming and reading back.
Some things come to mind:
- If you try to program it twice (without blank check), does it program the first 2 bytes correctly?
- Can you disable the verify after each write?
- Can you set the delay between write and verify? (I can't recall exactly what can and can't be set)
Interesting, here is someone with exactly the same problem: http://atariage.com/forums/topic/230587-burning-eproms/
hello there from greece i have a big problem and i want your knowlegde.... i have 4 sunblade 150 with timekeeps inside to keep the hostid and the mac address. before a few weeks the timekeepers stop working because they run out of battery. i have buy 8 of thems to replace them but when i put them on the sunblade 150 is all 00:00:00:00:00 i have see tha the tl866cs can read this chips, do you know how can i right the mac address that i want. because i have order from a store in usa and paid 400$ for 4 piece to right me the mac address that i want. so now i have 4 new from a company in usa and 8 new from ebay but with zeros on them can i copy them one by one. this is my chip http://www.memoryxsun.com/1006889.html its a timekeeper ST M48T59Y-70PC1.... so what should i buy the minipro tl866cs and an eeprom eraser?
Till friday i will not able to test the chip on motherboard. After i test it i will post results here. Do you think both programmer and chip are ok?