diff --git a/drivers/audio/ihdad/src/hda/device.rs b/drivers/audio/ihdad/src/hda/device.rs
index 78e8f0a281..2f9f0b6ced 100755
--- a/drivers/audio/ihdad/src/hda/device.rs
+++ b/drivers/audio/ihdad/src/hda/device.rs
@@ -13,6 +13,12 @@ use common::timeout::Timeout;
 use redox_scheme::scheme::SchemeSync;
 use redox_scheme::CallerCtx;
 use redox_scheme::OpenResult;
+use crate::hda::verbs::{
+    AC_VERB_PARAMETERS, AC_VERB_GET_CONNECT_SEL, AC_VERB_GET_CONNECT_LIST,
+    AC_VERB_GET_CONFIG_DEFAULT,
+    AC_PAR_NODE_COUNT, AC_PAR_AUDIO_WIDGET_CAP, AC_PAR_CONNLIST_LEN,
+    AC_PAR_FUNCTION_TYPE, AC_CLIST_LONG, AC_CLIST_LENGTH,
+};
 use scheme_utils::{FpathWriter, HandleMap};
 use syscall::error::{Error, Result, EACCES, EBADF, EIO, ENODEV, EWOULDBLOCK};
 
@@ -254,7 +260,7 @@ impl IntelHDA {
 
         node.addr = addr;
 
-        temp = self.cmd.cmd12(addr, 0xF00, 0x04)?;
+        temp = self.cmd.cmd12(addr, AC_VERB_PARAMETERS, AC_PAR_NODE_COUNT)?;
 
         node.subnode_count = (temp & 0xff) as u16;
         node.subnode_start = ((temp >> 16) & 0xff) as u16;
@@ -262,41 +268,37 @@ impl IntelHDA {
         if addr == (0, 0) {
             return Ok(node);
         }
-        temp = self.cmd.cmd12(addr, 0xF00, 0x04)?;
+        temp = self.cmd.cmd12(addr, AC_VERB_PARAMETERS, AC_PAR_FUNCTION_TYPE)?;
 
         node.function_group_type = (temp & 0xff) as u8;
 
-        temp = self.cmd.cmd12(addr, 0xF00, 0x09)?;
+        temp = self.cmd.cmd12(addr, AC_VERB_PARAMETERS, AC_PAR_AUDIO_WIDGET_CAP)?;
         node.capabilities = temp as u32;
 
-        temp = self.cmd.cmd12(addr, 0xF00, 0x0E)?;
+        temp = self.cmd.cmd12(addr, AC_VERB_PARAMETERS, AC_PAR_CONNLIST_LEN)?;
 
         node.conn_list_len = (temp & 0xFF) as u8;
 
         node.connections = self.node_get_connection_list(&node)?;
 
-        node.connection_default = self.cmd.cmd12(addr, 0xF01, 0x00)? as u8;
+        node.connection_default = self.cmd.cmd12(addr, AC_VERB_GET_CONNECT_SEL, 0x00)? as u8;
 
-        node.config_default = self.cmd.cmd12(addr, 0xF1C, 0x00)? as u32;
+        node.config_default = self.cmd.cmd12(addr, AC_VERB_GET_CONFIG_DEFAULT, 0x00)? as u32;
 
         Ok(node)
     }
 
     pub fn node_get_connection_list(&mut self, node: &HDANode) -> Result<Vec<WidgetAddr>> {
-        let len_field: u8 = (self.cmd.cmd12(node.addr, 0xF00, 0x0E)? & 0xFF) as u8;
-
-        // Highest bit is if addresses are represented in longer notation
-        // lower 7 is actual count
-
-        let count: u8 = len_field & 0x7F;
-        let use_long_addr: bool = (len_field >> 7) & 0x1 == 1;
+        let len_field: u8 = (self.cmd.cmd12(node.addr, AC_VERB_PARAMETERS, AC_PAR_CONNLIST_LEN)? & 0xFF) as u8;
+        let count: u8 = len_field & (AC_CLIST_LENGTH as u8);
+        let use_long_addr: bool = (len_field & (AC_CLIST_LONG as u8)) != 0;
 
         let mut current: u8 = 0;
 
         let mut list = Vec::<WidgetAddr>::new();
 
         while current < count {
-            let response: u32 = (self.cmd.cmd12(node.addr, 0xF02, current)? & 0xFFFFFFFF) as u32;
+            let response: u32 = (self.cmd.cmd12(node.addr, AC_VERB_GET_CONNECT_LIST, current)? & 0xFFFFFFFF) as u32;
 
             if use_long_addr {
                 for i in 0..2 {