Update sn76489.asm

Fix speed reversion
4 years ago · 24677d81be
1 changed files with 1 additions and 1 deletions
--- a/Source/HBIOS/sn76489.asm
+++ b/Source/HBIOS/sn76489.asm
@ -93,7 +93,7 @@ SN7_VOLUME_OFF:

 #IFDEF SBCV2004
 	LD	A,(HB_RTCVAL)
-	OR	%11110111		; SBC-V2-004+ CHANGE TO
+	AND	%11110111		; SBC-V2-004+ CHANGE TO
 	OUT	(RTCIO),A		; NORMAL CLOCK SPEED
 #ENDIF