programming a $42 cip

[83iroc383]

Hi, This is a first time to post hear, But I am new to this, I have a 89 chevy ecm #1227747 and I can not get it to program correctly? This is what I have done,I soldered the new dip socket and pluged a zf socket into that in the computer board,I can plug the original 4kb chip in and the truck will run fine, but if I copy the program on to a 27sf512 chip and plug it in with no changes to the program it runs in limp mode with the check engine light blinking. I am using a apu from moats for the programming, I have done an $od 64kb several times with no issues so I know it is something I am doing wrong. PLEASE can some one tell me where I am messing up!!! THANKS 83iroc383

[dave w]

Post the offsets you are programming the 27SF512 chip with.

http://static.moates.net/manuals/FlashAndBurn.pdf

dave w

[83iroc383]

I have tried 000000,00ffff and 000000,000fff and neither work

[83iroc383]

I looked at the file you sent and I think I had chip and buffer start and stop points backwards, I will try it tomorrow and let you know THANKS for the info

[dave w]

I have tried 000000,00ffff and 000000,000fff and neither work

I think you missed an "F" in the Chip Start / End addressing 00F000 - 00FFFF

dave w

File Size

Chip

Buffer Start -> End

Chip Start -> End

4k (4096)

27SF512

000000 -> 000FFF

00F000 -> 00FFFF

[dave w]

Buffer is the chip size, 4k chip is buffer address 00000 to 000FFF.

Chip start -> end is the address you want the 27SF512 to have the 4K chip, Starting Addess is 00F000 with the ending address 00FFFF.

The 27SF512 chip is 64K in size, you only need the last 4K of the 64K available in 27SF512.

"There are 10 kinds of people" those that understand binary and those that don't.

dave w

[uncabob]

Buffer is the chip size, 4k chip is buffer address 00000 to 000FFF.

Chip start -> end is the address you want the 27SF512 to have the 4K chip, Starting Addess is 00F000 with the ending address 00FFFF.

The 27SF512 chip is 64K in size, you only need the last 4K of the 64K available in 27SF512.

"There are 10 kinds of people" those that understand binary and those that don't.

dave w

Dave: Did I read somewhere that 27SF512 had to be erased first? Can someone link me to info about programming it with apu1 or flash and burn?