diff --git a/artiq/firmware/libboard/ident.rs b/artiq/firmware/libboard/ident.rs
index 26b5befdc..76ce2382d 100644
--- a/artiq/firmware/libboard/ident.rs
+++ b/artiq/firmware/libboard/ident.rs
@@ -1,13 +1,15 @@
-use core::{ptr, cmp, str};
+use core::{cmp, str};
 use csr;
 
 pub fn read(buf: &mut [u8]) -> &str {
     unsafe {
-        let len = ptr::read_volatile(csr::IDENTIFIER_MEM_BASE);
-        let len = cmp::min(len as usize, buf.len());
+        csr::identifier::address_write(0);
+        let len = csr::identifier::data_read();
+        let len = cmp::min(len, buf.len() as u8);
         for i in 0..len {
-            buf[i] = ptr::read_volatile(csr::IDENTIFIER_MEM_BASE.offset(1 + i as isize)) as u8
+            csr::identifier::address_write(1 + i);
+            buf[i as usize] = csr::identifier::data_read();
         }
-        str::from_utf8_unchecked(&buf[..len])
+        str::from_utf8_unchecked(&buf[..len as usize])
     }
 }
diff --git a/conda/artiq-dev/meta.yaml b/conda/artiq-dev/meta.yaml
index 08930c06e..a1b715eb2 100644
--- a/conda/artiq-dev/meta.yaml
+++ b/conda/artiq-dev/meta.yaml
@@ -15,7 +15,7 @@ requirements:
     - python >=3.5.3,<3.6
     - setuptools 33.1.1
     - migen 0.7 py35_2+git40721b2
-    - misoc 0.9 py35_2+git8435d832
+    - misoc 0.9 py35_3+git684b519a
     - jesd204b 0.4
     - microscope
     - binutils-or1k-linux >=2.27