Does it have any onboard flash? Embedded SBCs that have no wireless and no onboard state (like the RPi3 without wifi) are quite useful for security application

Does it have any onboard flash? Embedded SBCs that have no wireless and no onboard state (like the RPi3 without wifi) are quite useful for security applications like offline cold signing/CAs. The RPi4/5 have a flashable bootrom now so they don’t qualify any longer. The 1/2/3 load their second stage bootloader from the micro-SD, their first stage is burned at the factory and cannot be modified. If you remove the SD and physically destroy it, they can not persist state or exfiltrate data.