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Messing with the CAP DMA 75T?
Just got your hands on the Artix-7 75T board and the first thing you probably did was try to cook your own firmware to dodge detection. The stock firmware that comes with these CAP boards is usually flagged or generic as hell, so customizing your TLP handling and device descriptors is mandatory if you're hitting games protected by BlackCipher (GS).
The Vivado Trap: Why your board is bricking
If you tried to modify the BIN file directly or just swapped a few lines in the PCILEECH source and generated a bitstream that doesn't talk back, you likely messed up the PCIe core configuration or the constraints (.xdc) for the 75T. This chip has more gates than the standard 35T, so you can't just slap a generic firmware on it without adjusting the project settings in Vivado.
Common Firmware Logic & Detection Vectors:
BlackCipher is invasive, and while it's not quite at the level of Vanguard's boot-time scanning, it will punish inconsistent PCIe headers. Simply changing the VID is the bare minimum—you need a clean bitstream that looks like legitimate hardware.
Anyone else running a custom build on the 75T for BlackCipher games?
Just got your hands on the Artix-7 75T board and the first thing you probably did was try to cook your own firmware to dodge detection. The stock firmware that comes with these CAP boards is usually flagged or generic as hell, so customizing your TLP handling and device descriptors is mandatory if you're hitting games protected by BlackCipher (GS).
The Vivado Trap: Why your board is bricking
If you tried to modify the BIN file directly or just swapped a few lines in the PCILEECH source and generated a bitstream that doesn't talk back, you likely messed up the PCIe core configuration or the constraints (.xdc) for the 75T. This chip has more gates than the standard 35T, so you can't just slap a generic firmware on it without adjusting the project settings in Vivado.
Common Firmware Logic & Detection Vectors:
- VID/HID Modification: Absolutely mandatory. BlackCipher (GameSoul) isn't the most advanced AC, but it certainly checks for suspicious PCIe config space. If you show up as a generic Xilinx dev board, expect a manual ban once the heuristics flag you.
- Device Emulation: Don't just change 4 lines. You need to look at the Class Code, Revision ID, and Subsystem IDs. Ideally, you should be emulating a real-world device like a network controller or a RAID card.
- Vivado Workflow: Ensure your pcileech_pcie_cfg_i.v correctly maps the IDs you want. If you don't define the TLP header accurately, the communication will drop, which explains why the board "died" until you reflashed the base firmware.
If your board is non-responsive after a flash:
- Restore the factory BIN via JTAG to verify the hardware is still alive.
- Double-check your Vivado project constraints against the CAP 75T pinout.
- Avoid using "leaked" firmware IDs that are already blacklisted in the GameSoul database.
- Make sure the PCIe BAR size matches the device you are trying to spoof.
- Restore the factory BIN via JTAG to verify the hardware is still alive.
- Double-check your Vivado project constraints against the CAP 75T pinout.
- Avoid using "leaked" firmware IDs that are already blacklisted in the GameSoul database.
- Make sure the PCIe BAR size matches the device you are trying to spoof.
BlackCipher is invasive, and while it's not quite at the level of Vanguard's boot-time scanning, it will punish inconsistent PCIe headers. Simply changing the VID is the bare minimum—you need a clean bitstream that looks like legitimate hardware.
Anyone else running a custom build on the 75T for BlackCipher games?
