Add missing dumpreg.asm

dumpreg.asm

@@ -0,0 +1,33 @@
+; this kprints registers
+_int_2F:
+  push ss
+  push es
+  push ds
+  push di
+  push si
+  push bp
+  push sp
+  push dx
+  push cx
+  push bx
+  push ax
+
+  mov ax,cs
+  mov ds,ax
+  mov si,.fmt
+  call kprintf
+
+  pop ax
+  pop bx
+  pop cx
+  pop dx
+  pop sp
+  pop bp
+  pop si
+  pop di
+  pop ds
+  pop es
+  pop ss
+  iret
+.fmt:
+  db "AX=%X BX=%X CX=%X DX=%X SP=%X BP=%X SI=%X DI=%X", 0x0A, 0x0D, "DS=%X ES=%X SS=%X IP=%X CS=%X FL=%B", 0