看到了个Fable5.1弄的神奇项目, 是一个标签打印机的固件, 作者说他在速卖通上买了个热敏标签打印机, 然后打印机耗材用光了, 他就买了点第三方的热敏纸.…
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看到了个Fable5.1弄的神奇项目, 是一个标签打印机的固件, 作者说他在速卖通上买了个热敏标签打印机, 然后打印机耗材用光了, 他就买了点第三方的热敏纸. 结果这个标签打印机很鸡贼, 耗材是有RFID的(让我想起了空气净化器的滤芯), 检测到不是自家产品, 就降速然后降低打印质量. 由于是RFID, 于是大家的人肉破解方法是把用光的耗材的卷轴(类似卷纸芯的那根塑料轴，里边有RFID芯片), 放到打印机旁边, 然后把第三方耗材的卷轴拆掉. 这样打印机就只能感应到原厂塑料轴, 就能继续打印了. 作者气不过于是用Fable-5.1尝试破解这个打印机固件, 然后经过几次刷机后, 就成功了. 我看了下repo细节, 有挺多好玩的地方, 首先Fable-5.1成功推导出了控制打印浓度的公式: darkness=renderer_input×coefficient, 然后定位了打印浓度在内存中的位置, 然后甚至利用了 Cortex-M0 汇编代码洞跳转技术把浓度重映射的动态逻辑缝合了进去, 彻底绕过了降速和降质限制. 比较黑色幽默的是整个过程 AI 负责搞定高难度的 ARM 逆向, 数学推导和汇编注入, 而人类由于长了眼睛和手, 于是负责提供物理执行力, 也就是按电源键和看纸上的字够不够黑. 从目前来看 AI 正在把逆向工程这种原本专属于极客的"重工业技术"彻底平民化了. 照这个
Posted by karminski-牙医 (39.4k followers) 48 min ago · 17 likes · 1.1k views · view the original post on X. Kept by the AI Radar as AI agents.
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