Detection of the //e card is buggy in the cc65 runtime so implement my own detection of this HW to workaround the buggy double lores implementation.

a2bejwld/dbllores.h

@@ -22,7 +22,10 @@ extern void __fastcall__ mixedTextMode(void);
 // The Apple //e card does not implement double lores correctly.  The colours
 // used on the aux bank need to be shifted but the //e card expects unshifted
 // colour values (ie the same as those on the main.  This function is called
-// when the game detects it is runing on a //e card which causes the graphics
+// when the game detects it is not running on a //c or //gs.  I would like to
+// get_ostype() from the cc65 runtime but it doesn't work reliably for detecting
+// the //e card.  So I put in my own detection based on the technote.  If the
+// function detects it is runing on a //e card, it causes the graphics
 // routines to use the same colours in the main and aux banks.
 extern void __fastcall__ setBuggyDblLoRes(void);
 

a2bejwld/dbllores.s

@@ -912,6 +912,20 @@ square:     .BYTE $0
 .endproc
 
 .proc _setBuggyDblLoRes
+    bit $c082
+    
+    lda $fbb3
+    cmp #$6
+    bne @L3
+    
+    lda $fbc0
+    cmp #$e0
+    bne @L3
+    
+    lda $fbdd
+    cmp #$02
+    bne @L3
+    
     ldx #63
 @L1:
     lda bgColor,X
@@ -925,7 +939,9 @@ square:     .BYTE $0
     sta gemAuxColours,X
     dex
     bpl @L2
-    
+
+@L3:
+    bit $c080
     rts
 .endproc
 

a2bejwld/machine.c

@@ -94,8 +94,7 @@ void initMachine(void)
     } else if (machineIs2GS(machineType)) {
         vblInit2gs();
         gOldSpeed = setGSSpeed(GS_SPEED_SLOW);
-    }
-    else if (machineType == APPLE_IIECARD)
+    } else
         setBuggyDblLoRes();
 }
 

a2bejwld/ui.c

@@ -26,7 +26,7 @@
 // Defines
 
 #define SAVE_OPTIONS_FILE "A2BEJWLD.OPTS"
-#define VERSION "v2.5.a1"
+#define VERSION "v2.5.a3"
 
 #define OPTIONS_VERSION_UNSAVED 0
 #define OPTIONS_VERSION 2