I'm trying to run the "program-mec16xx" applet. I'm getting an error:
```  File "/home/andrew/glasgow/software/glasgow/applet/debug/arc/__init__.py", line 108, in set_halted
    await self.write(AUX_STATUS32_addr, AUX_STATUS32(halted=halted).to_int(), space="aux")
TypeError: __init__() got an unexpected keyword argument 'halted'
```
If I make the following changes, then it seems to work:
```diff
diff --git a/software/glasgow/applet/debug/arc/__init__.py b/software/glasgow/applet/debug/arc/__init__.py
index 7d2b00a..3b25e60 100644
--- a/software/glasgow/applet/debug/arc/__init__.py
+++ b/software/glasgow/applet/debug/arc/__init__.py
@@ -105,7 +105,7 @@ class ARCDebugInterface:
         await self._wait_txn()
 
     async def set_halted(self, halted):
-        await self.write(AUX_STATUS32_addr, AUX_STATUS32(halted=halted).to_int(), space="aux")
+        await self.write(AUX_STATUS32_addr, AUX_STATUS32(H=halted).to_int(), space="aux")
```
Note that I made this change without fully understanding what's going on. The H field sounded like it could have to do with the halted state. I'm a bit confused about how this could have ever worked. Looking through git history it doesn't seem like the field has been renamed. Maybe an older implementation of `bitstruct` or old name `Bitfield` could have been doing inexact matching?