Understanding data structure of "fgs.dnl" file from Nav-FX Update-CD

[cipicas]

Hello,
https://www41.zippyshare.com/v/03MsPN3M/file.html
pol ver

[Go4IT]

@DGAlexandru, great findings! Yes there is a separate SPI flash, specialized to contain the FPGA (Altera Cyclone) build instructions to form, i guess, some kind of ARM soft-cpu and maybe a gpu also, as it otherwise would male no sense to put a FPGA here and not a regular ARM cpu or MCU.
The flash is called EPCS4 and i fully read it out (see attach). But the content is encrypted for shure to protect IP (intellectual property). I have currently no clue how this works.

This is how Altera propose to connect it

b1549218978.25043.jpg

And this, how it is connected in FX graphicsboard

F4BC3C13-3FD3-4525-9FC0-EC7E157C784A.jpeg

[buzyz]

I think it would only make sense that the graphicsboard is an off the shelf module, and the FPGA just flashes fw onto it.
- probably someting similar to STVC035WT-01.

that would mean that the fgs.dnl is just a file that tells the fpga what to flash + text that is displaied while flashing
If we find the company who made that display module and get access to the original IDE it would make reverse engineering a lot faster and simpler

does anybody know what the main lcd IC is ?

[Go4IT]

In my Wiki you find some infos i managed to put there:
https://mk4-wiki.denkdose.de/artikel/na ... cd-display
https://mk4-wiki.denkdose.de/artikel/na ... phicsboard
And here is a block diagram

block_diagram.jpg

For what i found out to far is that it's a "TPO Displays Corp." of type "TJ058ZA01AA". It has 440 x 200 px and uses RGB555 (32.768 colors) color model. If it helps i disassemble one of them to see what's inside, as the LCD is stated as "active matrix display", so there is electronic inside.