Re: VR6 ECU

[Thom Peluso <tfp@tristate.pgh.net>]

The 27C512 is VERY common.....  VERY common! I have scads of'em in my 
junk box!!! They have a small "window" on them that is probably covered 
with a sticker indicating the firmware version number. If this sticker is 
removed, sunlight will ultimately ERASE the programming. In fact, I have 
a UV box which accelerates the erasing of the Eprom so I can "burn" new 
information on it. The programming is done through the "legs" in an EPROM 
burner. The whole process is like a floppy diskette. I can take a new 
EPROM and stick it in a "burner" and copy the contents to the PC. Then I 
piut a blank EPROM in and dump the code to the new one..... Waalaaa! A 
dupllicate. The burner does a checksum test to confirm the EXACT 
replication. The code can looked at and modified etc. It also can be 
saved onto a floppy diskeete or a harddrive!!!  KEWL, huh? Methinks we 
ought to sniff one and rewrite it ourselves!!! hahahahahahaha


Thom





 diskette

On Wed, 13 Aug 1997, Jayrham Chulani wrote:

> 
> Ok after some poking around I found some more information about the VR6
> ECU.  It is possible that the VW ECUs and BMW ECUs are similar (since they
> are both made by bosch).  If anyone has access to a 92+ 325 or 328, can
> someone verify if they have the same processor and EEPROm as we do?  They
> list the processor for the BMWs are an MCS-96/51 and a EEPROm of 27C512.
> The eeprom should look something like (pardon my ascii art again):
> 
>  ______________
> |              \
> |               |
> |           A   |
> | TMS-12FNT     |
> | B58 548       |
> | LU61A053P     |
> |               |
> |_______________|
> 
> I tried calling TI for the TMS-12FNT part number but it seems like that
> was a part number that VW and TI came up with.  In other words, the part
> number for this at retail stores might be different.  The 27C512 part they
> have listed for the BMW ECUs sounds similar to what we have in our cars.
> Can anyone help me veiry this?  Thanks.
> 
> --Jay
> 1996 Windsor Blue GLX
> Autotech Sport Tuned Exhaust
> K&N Filter minus Airbox Diffuser
> Curb Feelers 8-)
> 
> 
>