CPU's

[Bruce Plecan]

Slight mix up in what BCC, and Mask ID are, maybe?.
Only on some of the bins., does 0008 equate to where the Mask ID is.
Some use 4008.
The C3s used another location.
Bruce


The broadcast code can be determined by looking at the 9th byte in the BIN.
 I will read '8D' if it is an '8D' file.  Download Hex Workshop (free for
the first month) and view the bin.  You can also see the broadcast code
in TunerCat's Checksum calculator.  I am also showing it in HackyStack
(which
should be out there at the end of this week).
Tim

At Sun, 3 Dec 2000 22:39:8 -0800, "Bob Wooten" <r71chevy at earthlink.net>
wrote:

>
>I think that i have this straight, but would like to get your opinions
>on
>this.  I mostly stole it from the Tuner Cat FAQ's but have added some
>information to it from the list's.  i do have two Q's though.  the first
>is
>how do i determine the Broadcast code?  i have Win Bin, AFR Modifier,
> &
>data master all loaded up & none of them are telling (or i am missing
>it).
>the other thing is the question in the little description below.
>
>thanks again,
>BW
>
>PS i have this in a nice easy word document if anyone thinks that this
>would be a good thing to put into incoming or onto the FAQ section of
>the
>site.
>
>
>
>
>SW template, Prog p/n, Broad cast code, Prom ID, ECM p/n, Model Year,
>Application
>ID Byte,     Scan ID,
>
>$8D 16141562 AUJP/1563     5991 1227730  89-91     F/Y Body
>
>Þ SW Template:
> The software template, or ID Byte, is always a two bit code that describes
>the layout of the calibration.  These are the exact locations of tables
>&
>formulas that calculations are performed.  By looking @ the SW template
>you
>can know the locations of the tables in the calibration (which will
>give
>you an idea of application), but not the calibration of those tables
>(which
>you are probably going to change if you are reading this).
>
>Þ Prog. p/n:
> This is the GM part number for the program that is the calibration
>for
>that application and the other hardware that is required to install
>it into
>the ECM.
>
>Þ Broadcast code:
> The broadcast code is a four letter group that is unique to the actual
>firmware in that ECM.  This is specific to the application (91 Camaro,
> 5.7L
>motor, 700R4, 3.42 gears, etc) and the calibration.  The /1563 number
>is
>the last four digits of the GM part number for the calibration. (BW
>confusion here, why is it +1 digit?)
>
>Þ Scan ID:
> The scan ID or the Prom ID is a four digit number that is programmed
>into
>the firmware that tells the user the basic programming characteristics
>of
>that calibration and is specific to both the calibration and the
>application.  This number is for the mechanic or technician that has
>a scan
>tool that has it plugged into the ALDL connector.  The mechanic can
>look up
>the calibration of the application & know if it has been updated or
>changed
>or if it ought to be.
>
>Þ ECM p/n:
> This is the GM part number for the ECM.  This part number can & is
>used in
>many different applications depending on how GM wanted to use that ECM.
>This means that the same ECM can be used in a 4 cyl. naturally aspirated
>application or an 8 cyl. blown application.  The peripherals (knock
>sensor,
>O2 senor, map sensor, purge valve, etc) that are used in that application,
>is going to dictate the wiring harness & the calibration of the prom.
>
>
>
>--------------------------------------------------------------------
>--------
>To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
>in the body of a message (not the subject) to majordomo at lists.diy-efi.org
>

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org