diff --git a/src/constants.a b/src/constants.a
index d7b8714..d65910a 100644
--- a/src/constants.a
+++ b/src/constants.a
@@ -17,7 +17,7 @@
 ;~7400...... - program data (approximate)
 ;
 
-kPitchDarkBinaryAddress   = $3F2D
+kPitchDarkBinaryAddress   = $3F24
 
 kGameInfoBuffer           = $0800    ; used by LoadGameInfo
 kProDOSFileBuffer         = $1C00    ; 1K buffer for ProDOS MLI calls
diff --git a/src/pitchdark.init.a b/src/pitchdark.init.a
index 9b83c4a..b16b465 100644
--- a/src/pitchdark.init.a
+++ b/src/pitchdark.init.a
@@ -70,15 +70,16 @@
          bne   @findVidHD
 
 ;------------------------------------------------------------------------------
-; detect IIGS by running CPU-specific magic
+; detect IIGS
 ;------------------------------------------------------------------------------
 
-!cpu 65816
-         rep   #2                    ; clear Z flag on 65816 only
-!cpu 65c02
-         beq   +                     ; skip GS-specific code on non-GS machines (required, will crash on //c, grr)
-@setSHR
-         inc   WeCanHazSHR+1
+         lda   $FBB3
+         cmp   #$06
+         bne   +
+         sec
+         jsr   $FE1F                 ; check for IIgs (allows super hi-res artwork)
+         bcs   +
+@setSHR  inc   WeCanHazSHR+1
 +
 
 ;------------------------------------------------------------------------------