how would you seperate the code from the cal? since some code looks an awful lot like a 2d table? I assume there is no easy way? Or is every ldx a table?
Code can only be accessed by vector...
Type: Posts; User: 32v_dohc
how would you seperate the code from the cal? since some code looks an awful lot like a 2d table? I assume there is no easy way? Or is every ldx a table?
Code can only be accessed by vector...
I am including the data stream which I copied from ECMGUY's 8D hack:
L88C4: FDB $0000 ; NXT MSG ENTRY ADDER
;
FCB $F4 ; DEVICE ID
;
FCB $80 ; MEM FLAG, OUTPUT IS ROM TBL
FCB 64 ; NUM BYTE TO...
Looking at L88C4 we find(I already counted to the correct place and formated the data):
L88C4 db $F4
db $80
db $40
dw $014E
dw $014E
dw $8000
dw $8001
dw $0004
Sorry so long....
Ok. So now you have taken your bin and completely disassembled it going through all of the non-disassembled parts and checking that each is cal and not code. What you end up...
For the early stuff like my northstar, the ICM decodes the signal and the pcm recieves a signal similiar to what the ICM of a distributor would put out. For the northstar specifically the engine has...
I think hiding E-mails is important to some. I don't think it so much allows people to hide who they are but actually allows participants to answer questions posed to the group(not limiting who can...
To disassemble a hc11 bin file you must first get a disassembler.
There are two kinds you can get. The first is a straight disassembler. This kind looks at the next byte determines the op...
Part of the mystery is knowing what chip. The hc11 has vectors from FFC0 to FFFF. In your case the program is filled until FFEF. This would indicate a P4 computer. The vectors are the eight words...
They're all projects ;)
I'm currently working on making my 93 eldorado more drivable with more power. I also have an 88 monte carlo SS that I have intention of experimenting with the CCC carb to...
So I checked out programming 101 that Bruce Plecan has posted.. and heres where I get confused.
Take the spark table - Bruce has it at 0x035-0x106.
The chip used in that ECM was 000 to FFF and...
ftp://ftp.diy-efi.org/incoming/
John
Not sure what the F1 variant is.
The 68hc11 is the generic chip. For different requirements of ram, EEPROM, and output type stuff there are different packages. The F1 is one of those packages. If...
Hello everyone. My name is John. I am currently Hacking the 93-95 northstar PCM. I am one of those curious guys that always has to have little projects. I want to know how things work and why things...
Don't know of anyone yet. Doesn't mean its not out there.
Ludis' site shows it to be EEPROM. Once you get it out maybe I can help you with a few hacking trick
John
You can use an analog volt meter to check for injector fire.(or a niod lite) If the injectors are firing then VATS is not your problem. If the injector drivers are not switching ground then It is...
The processor is a MC68HC11F1 variant. Search for 16202476 on google and it will lead you to Tom Hussey's DIY post about the 97 PCM.
HTH
John
I am adding a link
...
good deal.. how early of northstar??
Mine is a 93. The 93-95 northstars all use the same computer(service numbers are upgrades) and same basic program.
John
As far as user input goes I beleive that the board and what is available should be widely spread. One of the things I see most with people making money off of the "Chipping" trade is that most do not...
Hi
I have interest in the obd1 section. I am currently working on the early northstar stuff. I am interested in finding out what all makes it work. I have quite a bit done but with 2 512K chips I...