GNU Info

(nasm.info)Section B.4.321

---

Next: Section B.4.322 Prev: Section B.4.320 Up: Section B.4

---

Enter node , (file) or (file)node

B.4.321. `UMOV': User Move Data
-------------------------------

     UMOV r/m8,reg8                ; 0F 10 /r             [386,UNDOC]
     UMOV r/m16,reg16              ; o16 0F 11 /r         [386,UNDOC]
     UMOV r/m32,reg32              ; o32 0F 11 /r         [386,UNDOC]

     UMOV reg8,r/m8                ; 0F 12 /r             [386,UNDOC]
     UMOV reg16,r/m16              ; o16 0F 13 /r         [386,UNDOC]
     UMOV reg32,r/m32              ; o32 0F 13 /r         [386,UNDOC]

   This undocumented instruction is used by in-circuit emulators to
access user memory (as opposed to host memory). It is used just like an
ordinary memory/register or register/register `MOV' instruction, but
accesses user space.

   This instruction is only available on some AMD and IBM 386 and 486
processors.