NT98321BG is a SoC made by Novatek, this chip is intented to be used on DVRs
SDK
SDK: https://drive.google.com/file/d/1hHo7R6QZg4pVAegdWrWi6Kg5OoI4kU3V
The toolchain didn't come with the SDK, i spent months trying to find it, if anyone ever finds it, PLEASE FOR THE LOVE OF GOD contact @housey2k or discord or github
Firmware modding tools
Hacking tools made by housey2k: https://github.com/housey2k/nt98321bg-hack
unpack.sh: unpacks firmware.sh into u-boot, bare metal bootloader, and squashfs partitions
build-img.sh: builds squashfs folder partitions into squashfs files
build-img-breaking.sh: builds everything back into a ready to flash firmware-rebuilt.bin, risks breaking stuff like u-boot log
Hardware info
CPU: ARM Cortex-A9
Arch: ARMv7-A
Word size: 32-bit
FPU: VFP hard-float (EABIhf)
Clock: 1.2GHz (wow, it could do so much but it's closed)
Board specific info, worth mentioning
Memory: DRAM 512MiB
SPI NOR: 16MB
External analog video PHY: NVP6168C (The SDK docs mentions another one that also works but i couldn't find it rn, but it's there)