ECU Bin Bytes 0x8000-0x8008

[Marc Randolph]

On Thu, Jul 20, 2000 at 05:15:41PM +0100, Malcolm Robb, LC 0112G wrote:
> Hi all,
> Turbo P4.doc.pdf gives the first 8 bytes in the EPROM binary as being 
> (actual values from my eprom) :
> 
> 0x8000-0x8001 = 0x0919 = 16 bit EPROM ID
> 0x8002-0x8003 = 0x006F = 16 bit DATECODE
> 0x8004-0x8005 = 0x064F = 16 bit SEQNUM
> 0x8006-0x8007 = 0x4F33 = 16 bit Checksum on bytes 0x8008 to 0xFFFF 
> inclusive
> 0x8008		= 0xB0  = 8 bit PROGID
> 
> Does anybody know how to decode the DATECODE and SEQNUM words ? I now have 
> a selection of EPROMS all supposedley AXSH2423, but some have different 
> values in DATECODE and SEQNUM. It has been suggested to me that part of the 
> engine number is encoded in these, and I'd be interested if this were true. 


0x006F   = 0111 decmial
0x064F   = 1615 decmial

My theory has been that the datecode 0111 is the 11th week of year 19x1
(probably 1991 in this case, right?).

I would be very interested in hearing if you can match it to
anything identifying the engine though!

   Marc

-- 
  Marc Randolph     -    mrand at pobox.com    -     PGP keyID: 0x4C95994D
     If you have any info on the mid-60's car called the Bill Thomas
       Cheetah, or know anyone that might, please contact me.
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