Added a comment to make the situation more clear.

diff --git a/libsrc/c64/acc_c65_speed.s b/libsrc/c64/acc_c65_speed.s
index 94fa50e9188a921f87a14cf2693b7803216d26dc..1c218f0b51a7e7e780d2354a6a3d32657faf5eb3 100755 (executable)
--- a/libsrc/c64/acc_c65_speed.s
+++ b/libsrc/c64/acc_c65_speed.s
@@ -54,7 +54,7 @@ _get_c65_speed:
 return_c65_speed:
         sta     C65_VICIII_KEY
         and     #$40
-        beq     speed_is_slow
+        beq     speed_is_slow              ; when this branch is taken then register A is already set to SPEED_SLOW
         lda     #SPEED_3X
         .byte   $2C
 speed_is_slow: