[zmann]

According to the question, but I make my answer rather broadened and if would attracted by some interesters. So, if it would be nice you guys want to leave some comment to my bottom line note too.

'rev B and rev C, can we put the same software version on it?'. If the question means Firmware in the MCU yes, we can put any fw version on any interface but may be useless. Commonly and always the fw up and down grade is automatically done when DB/PP2000/Lexia sw need it to be changed, otherwise done by the tool 'Interface Checker'. Firmware version variation and compatibility to the tool sw version are as seen...from my record and tests

v4.2.2 : Lexia/PPS last version (v348.01/v25.01)
v4.2.4 : DB v5.02 - v5.29
v4.2.8 : DB v5.30 - v5.??
v4.2.9 : found on DB v5.43 - v6.10
v4.3.0 : DB v6.11 - v7.39
v4.3.2 : DB v7.40 - ~v7.61
v4.3.3 : DB ~v7.61 -

The known limitation of the interface with 'Reference Serial' B, which allow to be used with any version of PP2000 and Lexia but on DiagBox not to exceed version of v5.29. This can be the answer if the original question is Software not the Firmware.

Structure of the firmware in the interface...
Firmware data content in flash memory of the Fujitsu MCU are devided into 7 sectors, sec. 0 - 6 plus one more (sector) in eeprom 25x40 (80).

When the FW is up/down graded the data in sec. 0 - 3 are always made change while sec. 4 - 6 keep no change as well as the data in eep. In one of the 'no change' sector (sec. 4) together with the data in eep influence in functioning of the interface seen as 'rev B or C' This's why when we obtain it as 'B' we do need to perform reflashing the MCU and the eep to make it 'C' and that to be done separately. Thanks to Mr. NLC who made a clever program to make the job easily done in a short single shot and without the need to disassemble the hardware.

However I found a nice friend on other forum mentioned that 'rev B or C' affecting the operation is nonsense... He's here too I think, hope when he hit this post, he would come and share. Mr. Scary also posted long ago on his first release of his Reflashing that he also change the VCI serial no. too (after the Reference Serial) to avoid problem.

Interesting info to me from the two above especially 'rev B or C is nonsense' because this was out of my testing scope long ago. I need to retest it together with the variation of the VCI serial no.

What is the Reference Serial and what's the VCI (interface) serial no.?
Not exactly clear (to me) what Reference Serial (xxxxxx B or C) is for. For VCI serial no., can only be seen from two sources, if not reading from the eep, the diag report by DiagBox section (attachment).

Back to the Reference Serial suffix, B or C. My notification to the 9780.Z5 interface PCBs, both of the boards have the etching of 4 letter, A, B, C and D in each connected square at one of the cornner. By several photos of the genuine VCI always notice the ink mark on the box of B and C on both PCBs. I linked these two phenomena together and triggering me to begin with some test by editing my VCI as rev 'D'. Unfortunately still found nothing. If the real rev 'D' VCI exist? and Actia hide some special function behide the suffix 'D' for using among those top level engineers?