diff --git a/src/patchers/bbf9.a b/src/patchers/bbf9.a
index 4484f20..cd128db 100644
--- a/src/patchers/bbf9.a
+++ b/src/patchers/bbf9.a
@@ -32,7 +32,7 @@
          jsr   SearchTrack
          !byte $A6,WILDCARD
          !byte $BD,$89,$C0
-         bcs   .exit
+         bcs   .exit      ; passport-test-suite/Odd One Out 1990.woz [C=0] matches
          sta   gDisplayBytes
          pha
          lda   #s_bbf9
diff --git a/src/patchers/bootcounter.a b/src/patchers/bootcounter.a
index 3b510e7..0c32a7f 100644
--- a/src/patchers/bootcounter.a
+++ b/src/patchers/bootcounter.a
@@ -18,7 +18,7 @@
          !byte $58,$FC,$A9,$0A,$85,$25,$2C,WILDCARD
          !byte WILDCARD,$CE,$17,$18,$D0,$05,$A9,$80
          !byte $8D,$18,$18
-         bcs   .exit
+         bcs   .exit      ; passport-test-suite/Elementary Vol. 2 v3.2 limited backup.woz [C=0] matches
          sta   gDisplayBytes
          pha
          lda   #s_bootcounter
diff --git a/src/patchers/c9ff.a b/src/patchers/c9ff.a
index d7ce9d4..e6d12f7 100644
--- a/src/patchers/c9ff.a
+++ b/src/patchers/c9ff.a
@@ -32,7 +32,7 @@
          !byte $60        ; RTS
          !byte $38        ; SEC
          !byte $60        ; RTS
-         bcs   .exit
+         bcs   .exit      ; passport-test-suite/Mr. Pixel's Programming Paint Set.woz [C=0] matches
          sta   gDisplayBytes
          pha
          txa
diff --git a/src/patchers/choplifter.a b/src/patchers/choplifter.a
index 0f65714..287f5b8 100644
--- a/src/patchers/choplifter.a
+++ b/src/patchers/choplifter.a
@@ -7,15 +7,26 @@
 ;
 ; tested on
 ; - Choplifter (Broderbund)
+; - Dueling Digits (Broderbund)
 ; - Eggs-It (Gebelli)
+; - High Orbit (Gebelli)
+; - Horizon V (Gebelli)
+; - Labyrinth (Broderbund)
+; - Lazer Silk (Broderbund)
 ; - Neptune (Gebelli)
+; - Phaser Fire (Gebelli)
+; - Russki Duck (Gebelli)
+; - Seafox (Broderbund)
+; - Serpentine (Broderbund)
+; - Sky Blazer (Broderbund)
+; - Star Blazer (Broderbund)
 ;-------------------------------
 !zone {
          rts              ; reachable only via inspect
 
 Choplifter
          lda   #$00
-         sta   gCommand
+         sta   gCommand   ; passport-test-suite/Eggs-It.woz [Z=1] reaches here
          sta   dct+1
          jsr   ChangeTrackNW
          jsr   IncProgress