The target architecture is set to "i386". 0x0000fff0 in ?? () Hardware assisted breakpoint 1 at 0x10a1f2: fat_demo_done. (2 locations) Breakpoint 1.2, fat_demo_done () at kernel/fat.c:299 299 void fat_demo_done(void) { __asm__ volatile("nop" ::: "memory"); } PASS: FAT16 geometry, root filtering, offset reads and non-contiguous 2->9->4 chain verified Hardware assisted breakpoint 2 at 0x10182e: file kernel/keyboard.c, line 114. Breakpoint 2, keyboard_ready () at kernel/keyboard.c:114 114 void keyboard_ready(void) { __asm__ volatile("" ::: "memory"); } PASS: FAT demo reaches original blocking keyboard consumer