backup codes

2025-12-19 22:25:54 +08:00
parent 8f711a4a2d
commit 397033e293
6 changed files with 1008 additions and 9 deletions
--- a/bsp/boot0.c
+++ b/bsp/boot0.c
@@ -16,6 +16,8 @@ __asm
        addw X, #3      ; [1C 00 03]
        cpw X, (1,SP)   ; [13 01]
        jrne _exit      ; [26 01]
+        // save SP to 0x0000
+        ldw 0x0000, Y
        // jump to ram
        ret             ; [81]
    _exit: