| the settings. First of all, I'm not copying JWT chips, I'm using the original code and modifying it just as JWT or anyone else should do. I don't know if there is a uniqueness to each ECU's EEPROM code but I feel more comfortable using the original ECU code. The process is simple. First you read the chip and save the file. Next you open the file with a hex editor to see the code. Now you only need to know which values at which registers to change and simply edit those values with the hex editor, resave the file and burn the file to an EEPROM. Say you want to raise the rev limiter from the stock setting of 7000 rpms to 7300 rpms. The stock value is at register 7FB4 and is a hex value of 8c. 8c is the same as a decimal value of 140. 140 times a conversion factor of 50 equals 7000. Dividing 7300 (the rev limit you want to change to) by 50 equals a decimal value of 146 which is a hex value of 92. To make it more simple. To change the rev limit to 7500.
7500 devided by 50 = 150.
Decimal 150 = hex 96.
Change the value at 7FB4 to 96. So as you can see, anyone can change the values of EEPROM firmware code without copying anything. All you need is the equipment and to know which part of the code the code controls. Here is a website that explains more about the code and which values to change to get the results you need. [ http://www.ztechz.net/ ]
(still can't decide on which sig to use :)
 
I think I speak for most when I say "We don't give 2 sh!ts" (n/m) - YugoBernie (NoVA) 11:40:06 01/15/03 (4) |
