diff --git a/res/history.md b/res/history.md
index e436b0e3a..b21648b56 100644
--- a/res/history.md
+++ b/res/history.md
@@ -15,6 +15,7 @@
 
 - Fix crash in Black Magic on Apple //c+ (closes [633](https://github.com/a2-4am/4cade/issues/633))
 - Fix quit option in Angry Birds (closes [636](https://github.com/a2-4am/4cade/issues/636))
+- Fix uninitialized value in Apple Cider Spider and its self-running demo
 - Improve joystick handling in Frogger II (closes [658](https://github.com/a2-4am/4cade/issues/658))
 - Properly reset Mockingboard speech chip on Ctrl-Reset (closes [660](https://github.com/a2-4am/4cade/issues/660))
 - Improve Mockingboard speech detection algorithm (closes [661](https://github.com/a2-4am/4cade/issues/661))
@@ -22,7 +23,6 @@
 - Remove false positive on A2FPGA which made it look like it supported Mockingboard speech even though it doesn't
 - Mark Mapple and Crime Wave as having in-game cheats
 - Remove debugging code from Mapple
-- Fix Angry Birds quit
 - Improve compatibility on machines running ROMx custom ROM and booting from BOOTi mass storage device
 - Add more game help (thanks Brendan R., Andrew R.)
 
diff --git a/src/demo/cider.spider.a b/src/demo/cider.spider.a
index f27ba2845..4b288c2c9 100644
--- a/src/demo/cider.spider.a
+++ b/src/demo/cider.spider.a
@@ -23,6 +23,7 @@
          bpl   -
 
          inx
+         stx   $306       ; uninitialized value in original game
          stx   $10AC
          inx
          stx   $10B1      ; reset vector patch
diff --git a/src/index/artwork.idx.a b/src/index/artwork.idx.a
index e496826ad..81f93deaa 100644
--- a/src/index/artwork.idx.a
+++ b/src/index/artwork.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  16010957
+         !be24  16010960
          !le16     5129
diff --git a/src/index/attract.idx.a b/src/index/attract.idx.a
index cb3163c2e..b31121354 100644
--- a/src/index/attract.idx.a
+++ b/src/index/attract.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15948820
+         !be24  15948823
          !le16     5807
diff --git a/src/index/cache00.idx.a b/src/index/cache00.idx.a
index d35e6d5a3..70bc4ac27 100644
--- a/src/index/cache00.idx.a
+++ b/src/index/cache00.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15880373
+         !be24  15880376
          !le16     4171
diff --git a/src/index/cache01.idx.a b/src/index/cache01.idx.a
index 00f569b97..d02556f02 100644
--- a/src/index/cache01.idx.a
+++ b/src/index/cache01.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15895068
+         !be24  15895071
          !le16     4642
diff --git a/src/index/cache10.idx.a b/src/index/cache10.idx.a
index d752bd3b2..876518c4a 100644
--- a/src/index/cache10.idx.a
+++ b/src/index/cache10.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15913830
+         !be24  15913833
          !le16     5617
diff --git a/src/index/cache11.idx.a b/src/index/cache11.idx.a
index 012358046..252d6e05a 100644
--- a/src/index/cache11.idx.a
+++ b/src/index/cache11.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15934986
+         !be24  15934989
          !le16     6209
diff --git a/src/index/coverfade.idx.a b/src/index/coverfade.idx.a
index c7625b1ad..ae7b28040 100644
--- a/src/index/coverfade.idx.a
+++ b/src/index/coverfade.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  16016086
+         !be24  16016089
          !le16      410
diff --git a/src/index/credits.idx.a b/src/index/credits.idx.a
index a5350c567..c608eeb59 100644
--- a/src/index/credits.idx.a
+++ b/src/index/credits.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  16016840
+         !be24  16016843
          !le16      449
diff --git a/src/index/decrunch.idx.a b/src/index/decrunch.idx.a
index d3708a456..08c09bcdd 100644
--- a/src/index/decrunch.idx.a
+++ b/src/index/decrunch.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  16017289
+         !be24  16017292
          !le16      309
diff --git a/src/index/demo.idx.a b/src/index/demo.idx.a
index c3faefc14..d65724bc5 100644
--- a/src/index/demo.idx.a
+++ b/src/index/demo.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15954627
+         !be24  15954630
          !le16     1757
diff --git a/src/index/dfx.idx.a b/src/index/dfx.idx.a
index 376685302..f09487ba3 100644
--- a/src/index/dfx.idx.a
+++ b/src/index/dfx.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15963424
+         !be24  15963427
          !le16     1640
diff --git a/src/index/dgr.fizzle.idx.a b/src/index/dgr.fizzle.idx.a
index 22d2a27f5..abf96abaf 100644
--- a/src/index/dgr.fizzle.idx.a
+++ b/src/index/dgr.fizzle.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  16016572
+         !be24  16016575
          !le16       67
diff --git a/src/index/dgr.idx.a b/src/index/dgr.idx.a
index 832175593..e345a1880 100644
--- a/src/index/dgr.idx.a
+++ b/src/index/dgr.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  16010898
+         !be24  16010901
          !le16       59
diff --git a/src/index/dhgr.idx.a b/src/index/dhgr.idx.a
index f73d1246b..b6a28239d 100644
--- a/src/index/dhgr.idx.a
+++ b/src/index/dhgr.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  16009234
+         !be24  16009237
          !le16     1510
diff --git a/src/index/dtitle.idx.a b/src/index/dtitle.idx.a
index d1fd08a47..dbdd0ecbe 100644
--- a/src/index/dtitle.idx.a
+++ b/src/index/dtitle.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15993982
+         !be24  15993985
          !le16      590
diff --git a/src/index/fx.idx.a b/src/index/fx.idx.a
index 4330cb174..dc010d92b 100644
--- a/src/index/fx.idx.a
+++ b/src/index/fx.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15960784
+         !be24  15960787
          !le16     2640
diff --git a/src/index/fxcode.idx.a b/src/index/fxcode.idx.a
index bc149caae..385db34b3 100644
--- a/src/index/fxcode.idx.a
+++ b/src/index/fxcode.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15965422
+         !be24  15965425
          !le16      246
diff --git a/src/index/fxdata.idx.a b/src/index/fxdata.idx.a
index 31e32556b..19566df8b 100644
--- a/src/index/fxdata.idx.a
+++ b/src/index/fxdata.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15965668
+         !be24  15965671
          !le16      538
diff --git a/src/index/gamehelp.idx.a b/src/index/gamehelp.idx.a
index 0f914346a..e8d1207ef 100644
--- a/src/index/gamehelp.idx.a
+++ b/src/index/gamehelp.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15966206
+         !be24  15966209
          !le16     7625
diff --git a/src/index/gr.fizzle.idx.a b/src/index/gr.fizzle.idx.a
index 57c0bfee2..1e0155696 100644
--- a/src/index/gr.fizzle.idx.a
+++ b/src/index/gr.fizzle.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  16016496
+         !be24  16016499
          !le16       76
diff --git a/src/index/gr.idx.a b/src/index/gr.idx.a
index 6712c20cf..8a4718f69 100644
--- a/src/index/gr.idx.a
+++ b/src/index/gr.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  16010744
+         !be24  16010747
          !le16      154
diff --git a/src/index/helptext.idx.a b/src/index/helptext.idx.a
index ca66d86f7..54bc1a4f7 100644
--- a/src/index/helptext.idx.a
+++ b/src/index/helptext.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  16016639
+         !be24  16016642
          !le16      201
diff --git a/src/index/hgr0.idx.a b/src/index/hgr0.idx.a
index 3f36e23e2..0832279cb 100644
--- a/src/index/hgr0.idx.a
+++ b/src/index/hgr0.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15994572
+         !be24  15994575
          !le16     4334
diff --git a/src/index/hgr1.idx.a b/src/index/hgr1.idx.a
index ae343b2fe..2ef769627 100644
--- a/src/index/hgr1.idx.a
+++ b/src/index/hgr1.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15998906
+         !be24  15998909
          !le16     1733
diff --git a/src/index/hgr2.idx.a b/src/index/hgr2.idx.a
index 21b16e482..288607bd9 100644
--- a/src/index/hgr2.idx.a
+++ b/src/index/hgr2.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  16000639
+         !be24  16000642
          !le16     1194
diff --git a/src/index/hgr3.idx.a b/src/index/hgr3.idx.a
index 8630742cd..c55de30e9 100644
--- a/src/index/hgr3.idx.a
+++ b/src/index/hgr3.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  16001833
+         !be24  16001836
          !le16     3441
diff --git a/src/index/hgr4.idx.a b/src/index/hgr4.idx.a
index 19e8945b2..e753ff6b6 100644
--- a/src/index/hgr4.idx.a
+++ b/src/index/hgr4.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  16005274
+         !be24  16005277
          !le16     3429
diff --git a/src/index/hgr5.idx.a b/src/index/hgr5.idx.a
index aad7af981..69a70863e 100644
--- a/src/index/hgr5.idx.a
+++ b/src/index/hgr5.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  16008703
+         !be24  16008706
          !le16      404
diff --git a/src/index/hgr6.idx.a b/src/index/hgr6.idx.a
index 144fcb7aa..fb7f58157 100644
--- a/src/index/hgr6.idx.a
+++ b/src/index/hgr6.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  16009107
+         !be24  16009110
          !le16      127
diff --git a/src/index/joystick.idx.a b/src/index/joystick.idx.a
index 0e552e772..44f539897 100644
--- a/src/index/joystick.idx.a
+++ b/src/index/joystick.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  16017598
+         !be24  16017601
          !le16     2370
diff --git a/src/index/miniattract0.idx.a b/src/index/miniattract0.idx.a
index b4bf43c5b..b7348d2ae 100644
--- a/src/index/miniattract0.idx.a
+++ b/src/index/miniattract0.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15979236
+         !be24  15979239
          !le16     5162
diff --git a/src/index/miniattract1.idx.a b/src/index/miniattract1.idx.a
index de35859ca..a68edb994 100644
--- a/src/index/miniattract1.idx.a
+++ b/src/index/miniattract1.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15984398
+         !be24  15984401
          !le16     2467
diff --git a/src/index/prelaunch.idx.a b/src/index/prelaunch.idx.a
index 51d8033b5..cc5d1ea7f 100644
--- a/src/index/prelaunch.idx.a
+++ b/src/index/prelaunch.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15941195
+         !be24  15941198
          !le16     7625
diff --git a/src/index/search00.idx.a b/src/index/search00.idx.a
index 68d945432..076526b87 100644
--- a/src/index/search00.idx.a
+++ b/src/index/search00.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15870820
+         !be24  15870823
          !le16     9553
diff --git a/src/index/search01.idx.a b/src/index/search01.idx.a
index 669013b8c..d9e0fdad5 100644
--- a/src/index/search01.idx.a
+++ b/src/index/search01.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15884544
+         !be24  15884547
          !le16    10524
diff --git a/src/index/search10.idx.a b/src/index/search10.idx.a
index 9547b3c30..39fd9106d 100644
--- a/src/index/search10.idx.a
+++ b/src/index/search10.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15899710
+         !be24  15899713
          !le16    14120
diff --git a/src/index/search11.idx.a b/src/index/search11.idx.a
index c395134cb..7173bdbdd 100644
--- a/src/index/search11.idx.a
+++ b/src/index/search11.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15919447
+         !be24  15919450
          !le16    15539
diff --git a/src/index/sfx.idx.a b/src/index/sfx.idx.a
index 56ef4ae85..8004ac193 100644
--- a/src/index/sfx.idx.a
+++ b/src/index/sfx.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15965064
+         !be24  15965067
          !le16      358
diff --git a/src/index/slideshow.idx.a b/src/index/slideshow.idx.a
index cc1e53f7c..a21bd5f36 100644
--- a/src/index/slideshow.idx.a
+++ b/src/index/slideshow.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15973831
+         !be24  15973834
          !le16     5405
diff --git a/src/index/title.idx.a b/src/index/title.idx.a
index 3dc5ab353..fbdfd2c13 100644
--- a/src/index/title.idx.a
+++ b/src/index/title.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15986865
+         !be24  15986868
          !le16     7117
diff --git a/src/index/xsingle.idx.a b/src/index/xsingle.idx.a
index 21f4ab286..575ccd812 100644
--- a/src/index/xsingle.idx.a
+++ b/src/index/xsingle.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15956384
+         !be24  15956387
          !le16     4400
diff --git a/src/prelaunch/cider.spider.a b/src/prelaunch/cider.spider.a
index edaeed96a..b90dfe059 100755
--- a/src/prelaunch/cider.spider.a
+++ b/src/prelaunch/cider.spider.a
@@ -28,7 +28,7 @@
          sta   $1C1E
 +
          lda   #0
-         sta   $306
+         sta   $306       ; uninitialized value in original game
          sta   $10AC
          lda   #1
          sta   $10B1      ; reset vector patch