Locked setting of individual keys if no controller seleted

zsnes/src/gui/guimouse.inc

@@ -2196,6 +2196,14 @@ DisplayGUIInputClick:
     mov edi,pl5selk
     mov dword[keycontrolval],pl5contrl
 .nopl5
+    
+    push ebx
+    mov ebx,[GUIcurrentinputcursloc]
+    mov bl,[GUIInputRefF+ebx]
+    cmp bl,0
+    pop ebx
+    je .lockInputChange
+
     DGOptnsProcBox 45,150,[edi]
     DGOptnsProcBox 45,140,[edi+4]
     DGOptnsProcBox 45,100,[edi+8]
@@ -2209,6 +2217,8 @@ DisplayGUIInputClick:
     DGOptnsProcBox 85,110,[edi+40]
     DGOptnsProcBox 85,150,[edi+44]
 
+.lockInputChange
+
     mov edi,pl1Atk
     cmp byte[cplayernum],1
     jne .nopl2t
@@ -2226,11 +2236,21 @@ DisplayGUIInputClick:
     jne .nopl5t
     mov edi,pl5Atk
 .nopl5t
+
+    push ebx
+    mov ebx,[GUIcurrentinputcursloc]
+    mov bl,[GUIInputRefF+ebx]
+    cmp bl,0
+    pop ebx
+    je .lockInputChange2
+
     DGOptnsProcBox 165,100,[edi]      ; A Turbo
     DGOptnsProcBox 165,110,[edi+4]    ; B Turbo
     DGOptnsProcBox 125,100,[edi+8]    ; X Turbo
     DGOptnsProcBox 125,110,[edi+12]   ; Y Turbo
 
+.lockInputChange2
+
     mov edi,pl1Ltk
     cmp byte[cplayernum],1
     jne .nopl2tl
@@ -2248,9 +2268,19 @@ DisplayGUIInputClick:
     jne .nopl5tl
     mov edi,pl5Ltk
 .nopl5tl
+
+    push ebx
+    mov ebx,[GUIcurrentinputcursloc]
+    mov bl,[GUIInputRefF+ebx]
+    cmp bl,0
+    pop ebx
+    je .lockInputChange3
+
     DGOptnsProcBox 125,120,[edi]      ; L Turbo
     DGOptnsProcBox 165,120,[edi+4]    ; R Turbo
 
+.lockInputChange3
+
     mov edi,pl1ULk
     cmp byte[cplayernum],1
     jne .nopl2tb
@@ -2268,10 +2298,21 @@ DisplayGUIInputClick:
     jne .nopl5tb
     mov edi,pl5ULk
 .nopl5tb
+
+    push ebx
+    mov ebx,[GUIcurrentinputcursloc]
+    mov bl,[GUIInputRefF+ebx]
+    cmp bl,0
+    pop ebx
+    je .lockInputChange4
+
     DGOptnsProcBoxb 165,140,[edi]
     DGOptnsProcBoxb 165,150,[edi+4]
     DGOptnsProcBoxb 125,140,[edi+8]
     DGOptnsProcBoxb 125,150,[edi+12]
+
+.lockInputChange4
+
 %ifdef __MSDOS__
     xor ebx,ebx
     mov bl,[cplayernum]