My father received a video card in the mail last week. He gave it to me and I dismantled the card to get to just the video player and other components.
The labels here are based on my experience tinkering with it. I don't have any hardware experience to speak of. I plugged this into my Mac through the USB and found one folder, VIDEO, within which was the video played through the card. It was a .mov file. I tried replacing it with a random .mov file on my drive, but I got a Incompatible File Type message on the screen.
There are no other files or folders on the device (hidden or otherwise), beyond what Apple put in for Finder's indexing. It shows up as a FAT-32 drive.
I've been trying to figure out how to access the chip to change what filetypes it accepts or to put in some custom code, but how would I get into it? All I can see currently is the flash-drive section, not any executables to tamper with.
The three main black areas (I could use some proper terminology here) of the CPU (?) are:
- "hynlx" 512A KOR (I guess Korea)
- SAMSUNG 031 PCBO
- ATJ2273B-C
Update: Here is the data sheet, but this doesn't get me any closer to accessing it.
Best Answer
Yes, you've identified the subsystems correctly. On the main PCB, the "black areas" are individual chips.
This is an SDRAM chip, used by the firmware on the SOC in general, and in particular as a frame buffer for the decoded video.
This is a flash EEPROM chip, which contains both the firmware for the SOC and the video file.
This is the main processor (system on chip, or SOC).
It contains a general-purpose CPU, along with USB, SDRAM, audio and video display controllers, and it "runs the show".