Not either CRC-16 or CRC-32 as far as I can tell. I did find a nice little CRC calculator though, does -16 and -32 as you type in the string of digits. Nice! http://www.efg2.com/Lab/Mathematics/CRC.htm Doesn't create the 9010A ROM signature either though...now to find a signature generator like the CRC calculator... John :-#)# At 05:51 PM 22/09/2002 -0700, John Robertson wrote:
Definitely the last two bytes are some sort of checksum.
In further digging I find the following bytes are defined as follows: (note the bytes here refer to the original read as in serial #4900002 down below)
Byte 04 = Hard drive type (according to the lookup list of fluke - 42 is the WD/Miniscribe8425 Byte 0A = Report Drive Errors No = 00, Yes = 0A Byte 0F = RAM Size 18 = 1.5M, 20 = 2.0M, 40 = 4.0M Byte 11 = Network node # Byte 14 = No Network Boot (00) or Network Boot (01) Byte 18 = 9100 (FE) or 9105 (FF)
and the last two bytes are changing each time...not an obvious checksum, might be the !@#$!$# Fluke Signature...it is for the entire data stream though, not just the serial number. Done enough for now, someone else can figure that out...need to get shopping done...kids lunches...etc...
I've posted a series of different reads of the EEPROM on ftp://ftp.flippers.com/Fluke/9100_Fixture/ called EEPROM.ZIP and if anyone wants to figure that out go for it!
Note that the data is scrambled on this EEPROM file as they are read by my Andromeda Research programmer and it seems to shuffle the data bytes around. If you compare the 2444pep1 to the stream from serial number 4900002 you will see the pattern shift. instead of byte 0, 1, 2, 3, 4, 5....1D, 1E, 1F the stream is 0,1, 10, 11, 8, 9, 18, 19, 4, 5, 14, 15, c, d, 1c, 1d, 2, 3, 12, 13, a, b, 1a, 1b, 6, 7, 16, 17, e, f, 1e, 1f. Like I say a bit scrambled...
2444pep1 is the default 2444pep2 is Network changed to 55, memory to 1.5m, system to 9105 2444pep3 changed back to 9100 others left the same 2444pep4 not sure thing this is where I changed the RAM to 2M 2444pep7 Changed hard drive setting to 3rd option (on my machine) 2444pep8 Changed to network boot 2444pep9 Changed network node to -1 (FF) 2444pepa Changed back to system boot and turned off disk error reporting.
John :-#)#
At 04:41 PM 20/09/2002 -0700, John Robertson wrote:
It appears the last two bytes (BF BE & 23 0F) are a checksum of some sort for the serial number...anybody have an idea?
004A C4A2 = #4900002 CS=BEBF? 0048 DC58 = #4775000 CS=0F23?
John :-#)#
At 07:38 AM 19/09/2002 +0000, steve@coule.freeserve.co.uk wrote:
So what I have is two 32 byte data streams, the first one (old base) is serial number 4900002 (unknown Site Code) is: A2 C4 4A 00 42 03 FF FB 01 00 0A 00 03 50 08 40 00 00 00 00 00 03 00 00 FE 02 00 00 00 00 BF BE
And serial number (NOS) 4775000 "Site Code 1" is: 58 DC 48 00 42 00 FC 00 FC 00 00 00 03 50 08 20 00 00 00 00 00 00 00 00 FE 02 01 00 00 00 23 0F
I suspect the first three bytes are the serial number...maybe...
The first three bytes are the serial number! Just put the hex numbers 004ac42a into calculator as a hex number, convert to decimal and it's 4900002 ... he other works too!
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