VS 5litre auto xdf help

[jezza351]

Hi again guys i have taken a reading of a chip from a 96 vs auto 5litre and can only seem to read some of it in the $83 vs xdf like timing, ves but no afr or trans controls, any xdf files ive missed? Thanks

[jezza351]

ive uploaded the file so yas can have a look thanks again

[yoda69]

I could be wrong, but it looks like a misread or some form of custom chip.
There are what appears to be a few comments at FF00 that I haven't seen in factory bins.
I also noticed when doing a compare with BWFU that everything else in the bin appears to be offset by -1, including all the code.
Did it have any stickers on it?

yoda69

Quick clarify, values in the bin appear to have a value 1 less than BWFU at the same location, the file addresses are NOT offset.
Not all values are 1 less, some are the same.

[jezza351]

there was no sticker with it mate was a custom tune already done by a fella in adelaide, i will have another look into it and see what i can come up with

[antus]

I think its missing data bit 0 so everything with a 1 in the bit=1 column got a 0 instead so decreased those values by 1

Update: Yep, It says 'VR' Instead of 'VS' In the ascii toward the end, and S is 01010011 and its come out as 01010010 instead making it read VR. V is 01010110 so is unaffected.

[jezza351]

ok confused! so is there any way to read it properly, im lost lol

[antus]

Check your connections, specifically to data pin 0. In this picture its pin 11, labelled Q0. Data from that pin seems to be always 0, never 1.

27C512.gif

[jezza351]

righto might be a silly question but all the eproms ive seen on the vr vs 5litre auto hace the 27c512 written on it this doesnt have it anywhere just 1616 7633 blu4ba29np 980 singapore, not sure if its normal, taken a few readings now, double checked connections, comes up same.

[antus]

It has to be readable with exactly the same electrical and timing specs as the 27C512, or else the computer wont be able to use it, so you will be fine to treat it as one for the read. It might be some other beast as far as writing goes, but that wont affect you. Also, did you get it in to the reader by desoldering it? If you did its possible that you've cooked the interconnects on that pin inside the chip, which wouldnt be a good thing.

[jezza351]

no im using a moates header on the memcal with a willem programmer didnt desolder it, also took a reading from it with the burn2 aswell came up the same, this one has me stumped