diff --git a/aip.s b/aip.s
index a64e679..a669e7d 100644
--- a/aip.s
+++ b/aip.s
@@ -77,7 +77,7 @@ label_6a:
 label_6c:
 	.long	0xa0000000
 label_70:
-	.long	0xac00e0d0
+	.long	0xac00e0d0	/* label_d0 */
 label_74:
 	.long	0xac00fc00
 label_78:
@@ -117,7 +117,7 @@ label_b2:
 	nop
 
 label_b8:
-	.long	0xac00e004
+	.long	0xac00e004	/* label_b4 */
 label_bc:
 	.long	0x8c00f400
 label_c0:
diff --git a/sg_ini.s b/sg_ini.s
index 5c072d3..6deaf92 100644
--- a/sg_ini.s
+++ b/sg_ini.s
@@ -407,7 +407,9 @@ label_2288:
 label_228a:
 	.word 0x0006	/* r3 */
 label_228c:
-	.long 0xff000038
+	.long 0xff000038 /* QACR0 ←
+			    QACR1 ←
+			*/
 
 label_2290:
 	.word 0x0001
@@ -434,7 +436,7 @@ label_22a6:
 	.word 0x0018     /* r3 → bsrf label_21bc */
 label_22a8:
 	.long 0xff000024 /* r2
-			    ?? ← 0x00000020 */
+			    EXPEVT ← 0x00000020 */
 label_22ac:
 	.long 0x00000020 /* r1 */