diff --git a/ubb-la/ubb-la.c b/ubb-la/ubb-la.c
index 22b9e57..ebeb3f7 100644
--- a/ubb-la/ubb-la.c
+++ b/ubb-la/ubb-la.c
@@ -229,6 +229,9 @@ static void xfers(unsigned long *bufs, int n_bufs, int nibbles,
 }
 
 
+/* ----- ASCII output ------------------------------------------------------ */
+
+
 static void print_samples(FILE *file, uint8_t *buf, int skip, int nibbles)
 {
 	uint8_t v, last = 0xff;
@@ -260,6 +263,9 @@ static void print_samples(FILE *file, uint8_t *buf, int skip, int nibbles)
 }
 
 
+/* ----- Capture ----------------------------------------------------------- */
+
+
 static int do_buf(int nibbles, uint32_t trigger, uint32_t mask)
 {
 	uint8_t *buf = physmem_malloc(4096);