diff --git a/svd/svd.py b/svd/svd.py
index fb44296..0225136 100644
--- a/svd/svd.py
+++ b/svd/svd.py
@@ -176,8 +176,8 @@ class SvdPeripheral(NamedTuple):
     disableCondition: str
     baseAddress: int
     registerProperties: SvdRegisterProperties
-    addressBlock: SvdAddressBlock
-    interrupt: SvdInterrupt
+    addressBlock: Sequence[SvdAddressBlock]
+    interrupt: Sequence[SvdInterrupt]
     registers: Sequence[Union[SvdRegister, SvdCluster]]
 
 
@@ -198,5 +198,16 @@ class SvdDevice(NamedTuple):
     peripherals: Sequence[SvdPeripheral]
     vendorExtensions: Any
 
+    def __eq__(self, other):
+        return self.vendor == other.vendor and self.vendorID == other.vendorID \
+            and self.name == other.name and self.series == other.series and \
+            self.version == other.version and self.description == other.description \
+            and self.licenseText == other.licenseText and self.cpu == other.cpu \
+            and self.headerSystemFilename == other.headerSystemFilename and \
+            self.headerDefinitionsPrefix == other.headerDefinitionsPrefix and \
+            self.addressUnitBits == other.addressUnitBits and self.width == other.width \
+            and self.registerProperties == other.registerProperties and \
+            self.peripherals == other.peripherals
+
     # TODO: functions for expanding/flattening registerProperties, dimElements and derivedFrom?
 
diff --git a/svd/svdgen.py b/svd/svdgen.py
index 4247521..cae5232 100644
--- a/svd/svdgen.py
+++ b/svd/svdgen.py
@@ -1,19 +1,18 @@
 
+import xml, xml.etree
+import xml.etree.ElementTree as ET
 import typing, collections.abc
 
 from svd import *
 from typing import get_type_hints
 
 
-# FIXME:
-# * peripheral registers not emitting
-
-
 def ser_one(v) -> str:
     assert v is not None
     if isinstance(v, bool): return "true" if v else "false"
     elif isinstance(v, int): return hex(v)
-    elif isinstance(v, str): return v
+    elif isinstance(v, str):
+        return v.replace('&', "&amp;").replace('<', "&lt;").replace('>', "&gt;")
     elif type(v) == tuple:
         return "r%dp%d" % (v[0], v[1])
     else: return None
@@ -47,9 +46,17 @@ type2tag = {
     SvdPeripheral: 'peripheral',
     SvdDevice: 'device',
 }
+flattenchildren = {
+    SvdEnumeratedValues: {'enumeratedValue'},
+    SvdCluster: {'cluster','register'},
+    SvdDimArrayIndex: {'enumeratedValue'},
+    SvdPeripheral: {'interrupt','addressBlock'},
+}
 
 
-def gen_generic(f, svdelem, T, tag, attrs=(), extraattr="", no_outer=False):
+def gen_generic(f, svdelem, T: type, tag: str, attrs=(), extraattr="", no_outer=False, rec=[]):
+    rec=[*rec, tag]
+    #print(rec, T, type(svdelem))
     atdict={}
     childdict={}
 
@@ -71,18 +78,33 @@ def gen_generic(f, svdelem, T, tag, attrs=(), extraattr="", no_outer=False):
         typ = types[k]
         x = ser_one(v)
         if x is None: # TODO: optimize
-            if '__origin__' in typ.__dict__ and typ.__origin__ == collections.abc.Sequence:
+            #print('k', k, "typ",typ)
+            if typ == typing.Any and k == 'vendorExtensions':
+                if type(v) == ET.Element:
+                    #print("v",v,type(v))
+                    xstr = ET.tostring(v, method='xml')#, encoding='utf8')
+                    xstr = xstr.decode()
+                    #print("xstr",xstr)
+                    f.write(xstr)
+                else:
+                    # uuuuuh idk fuck
+                    f.write(repr(v))
+                f.write('\n')
+
+            elif typ == list or ('__origin__' in typ.__dict__ and typ.__origin__ in {collections.abc.Sequence,list}):
                 if len(v) > 0:
-                    f.write("<%s>\n" % k)
+                    flatten = k in flattenchildren.get(T, ())
+                    if not flatten: f.write("<%s>\n" % k)
                     ttt = typ.__args__[0]
-                    isunion = '__origin__' in ttt.__dict__ and ttt.__origin__ == typing.Union
+                    isdyn = ttt == typing.Any or ('__origin__' in ttt.__dict__ and ttt.__origin__ == typing.Union)
                     for x in v:
-                        if isunion: ttt = type(x)
-                        gen_generic(f, x, ttt, type2tag[ttt], type2attr.get(ttt, ()))
-                    f.write("</%s>\n" % k)
+                        if isdyn: ttt = type(x)
+                        #print("ttt",ttt)
+                        gen_generic(f, x, ttt, type2tag[ttt], type2attr.get(ttt, ()), rec=[*rec, k])
+                    if not flatten: f.write("</%s>\n" % k)
             else:
                 noouter = typ in {SvdDimElement, SvdRegisterProperties}
-                gen_generic(f, v, typ, k, type2attr.get(typ, ()), no_outer=noouter)
+                gen_generic(f, v, typ, k, type2attr.get(typ, ()), no_outer=noouter, rec=[*rec, k])
         else:
             f.write("<%s>%s</%s>\n"%(k, x, k))
 
diff --git a/svd/svdparse.py b/svd/svdparse.py
index 1ccdf6d..dd8bda3 100644
--- a/svd/svdparse.py
+++ b/svd/svdparse.py
@@ -192,6 +192,9 @@ def parse_registers(xd) -> Sequence[Union[SvdCluster, SvdRegister]]:
 def parse_peripheral(xd) -> SvdPeripheral:
     return parse_generic(xd, SvdPeripheral, 'peripheral', True, True, False, {
         'registers': parse_registers, # FIXME
+    }, {
+        'interrupt': parse_interrupt,
+        'addressBlock': parse_addressBlock
     })