diff --git a/common.mk b/common.mk
index cad1261..098c356 100644
--- a/common.mk
+++ b/common.mk
@@ -130,8 +130,8 @@ audio.pcm:
 %.data.o: %.data
 	$(BUILD_BINARY_O)
 
-regs/%.csv: regs/%.ods
-	libreoffice --headless -convert-to csv:"Text - txt - csv (StarCalc)":44,34,76,,,,true --outdir regs/ $<
+%.csv: %.ods
+	libreoffice --headless -convert-to csv:"Text - txt - csv (StarCalc)":44,34,76,,,,true --outdir $(dir $@) $<
 
 maple/maple_bus_commands.hpp: regs/maple_bus_commands.csv regs/gen/maple_bus_commands.py
 	python regs/gen/maple_bus_commands.py $< > $@
diff --git a/regs/gen/core_bits.py b/regs/gen/core_bits.py
index 2b66ddb..5fa2458 100644
--- a/regs/gen/core_bits.py
+++ b/regs/gen/core_bits.py
@@ -4,7 +4,7 @@ from pprint import pprint
 from dataclasses import dataclass
 from typing import Union
 
-from sh7091 import read_input
+from csv_input import read_input
 from generate import renderer
 
 def aggregate_registers(d):
diff --git a/regs/gen/csv_input.py b/regs/gen/csv_input.py
new file mode 100644
index 0000000..e694b84
--- /dev/null
+++ b/regs/gen/csv_input.py
@@ -0,0 +1,27 @@
+import csv
+
+def as_dict(header, row0):
+    row = [s.strip() for s in row0]
+    return dict(zip(header, row))
+
+def read_input(filename):
+    with open(filename) as f:
+        reader = csv.reader(f, delimiter=",", quotechar='"')
+        header, *rows = reader
+
+    rows = [
+        as_dict(header, row)
+        for row in rows
+        if "".join(map(str, row)).strip()
+    ]
+
+    return rows
+
+def read_input_headerless(filename):
+    with open(filename) as f:
+        reader = csv.reader(f, delimiter=",", quotechar='"')
+        rows = [
+            [s.strip() for s in row]
+            for row in reader
+        ]
+    return rows
diff --git a/regs/gen/gdrom.py b/regs/gen/gdrom.py
index 74bca5c..b9cbca0 100644
--- a/regs/gen/gdrom.py
+++ b/regs/gen/gdrom.py
@@ -2,7 +2,9 @@ from collections import defaultdict
 from dataclasses import dataclass
 import sys
 
-from sh7091 import read_input, size_to_type, headers
+from csv_input import read_input
+from sh7091 import size_to_type
+from sh7091 import headers
 from generate import renderer
 
 @dataclass
diff --git a/regs/gen/holly.py b/regs/gen/holly.py
index 91cb896..f5d76cb 100644
--- a/regs/gen/holly.py
+++ b/regs/gen/holly.py
@@ -1,7 +1,7 @@
 import sys
 
 from sh7091 import new_writer
-from sh7091 import read_input
+from csv_input import read_input
 from sh7091 import headers
 from generate import renderer
 
diff --git a/regs/gen/maple_bus_commands.py b/regs/gen/maple_bus_commands.py
index cd00841..405c1d3 100644
--- a/regs/gen/maple_bus_commands.py
+++ b/regs/gen/maple_bus_commands.py
@@ -2,7 +2,7 @@ from dataclasses import dataclass
 from typing import Union
 import sys
 
-from sh7091 import read_input
+from csv_input import read_input
 from generate import renderer
 
 @dataclass
diff --git a/regs/gen/maple_data_format.py b/regs/gen/maple_data_format.py
index 4ca5a52..4be5c48 100644
--- a/regs/gen/maple_data_format.py
+++ b/regs/gen/maple_data_format.py
@@ -1,8 +1,8 @@
-import csv
 import sys
 from dataclasses import dataclass
 from collections import defaultdict
 
+from csv_input import read_input_headerless
 from generate import renderer
 
 @dataclass
@@ -23,15 +23,6 @@ class Format:
     field_order: list[str]
     size: int
 
-def read_input(filename):
-    with open(filename) as f:
-        reader = csv.reader(f, delimiter=",", quotechar='"')
-        rows = [
-            [s.strip() for s in row]
-            for row in reader
-        ]
-    return rows
-
 def parse_bits(bits: list[str]):
     bit_order = [7, 6, 5, 4, 3, 2, 1, 0]
     by_name = defaultdict(list)
@@ -135,7 +126,7 @@ def render_formats(name, formats):
     yield "}"
 
 if __name__ == "__main__":
-    rows = read_input(sys.argv[1])
+    rows = read_input_headerless(sys.argv[1])
     name = sys.argv[1].split('.')[0].split('_')[-1]
     assert len(name) == 3 or len(name) == 4
     formats = parse(rows)
diff --git a/regs/gen/memorymap.py b/regs/gen/memorymap.py
index ec88a6f..d4f2370 100644
--- a/regs/gen/memorymap.py
+++ b/regs/gen/memorymap.py
@@ -1,6 +1,6 @@
 import sys
 
-from sh7091 import read_input
+from csv_input import read_input
 
 from generate import renderer
 
diff --git a/regs/gen/systembus.py b/regs/gen/systembus.py
index 2487077..0bbdfe2 100644
--- a/regs/gen/systembus.py
+++ b/regs/gen/systembus.py
@@ -1,7 +1,7 @@
 import sys
 
 from sh7091 import new_writer
-from sh7091 import read_input
+from csv_input import read_input
 from sh7091 import headers
 from sh7091 import blocks
 from generate import renderer
diff --git a/regs/gen/ta_parameter_format.py b/regs/gen/ta_parameter_format.py
index 5daf245..5ea3ee5 100644
--- a/regs/gen/ta_parameter_format.py
+++ b/regs/gen/ta_parameter_format.py
@@ -1,8 +1,8 @@
 from dataclasses import dataclass
 from pprint import pprint
 import sys
-import csv
 
+from csv_input import read_input_headerless
 from generate import renderer
 
 _field_types = {
@@ -182,17 +182,8 @@ def headers():
     yield "#include <cstdint>"
     yield ""
 
-def read_input(filename):
-    with open(filename) as f:
-        reader = csv.reader(f, delimiter=",", quotechar='"')
-        rows = [
-            [s.strip() for s in row]
-            for row in reader
-        ]
-    return rows
-
 if __name__ == "__main__":
-    rows = read_input(sys.argv[1])
+    rows = read_input_headerless(sys.argv[1])
     namespace = sys.argv[2]
     declarations = parse(rows)
     render, out = renderer()