diff --git a/compiler/res/prog8lib/cx16/diskio.p8 b/compiler/res/prog8lib/cx16/diskio.p8
index 5b66d02af..c7a85a8be 100644
--- a/compiler/res/prog8lib/cx16/diskio.p8
+++ b/compiler/res/prog8lib/cx16/diskio.p8
@@ -414,7 +414,7 @@ byte_read_loop:         ; fallback if MACPTR isn't supported on the device
         while num_bytes!=0 {
             %asm {{
                 jsr  cbm.CHRIN
-m_in_buffer     sta  $ffff
+m_in_buffer     sta  $ffff          ; modified
                 inc  m_in_buffer+1
                 bne  +
                 inc  m_in_buffer+2
diff --git a/compiler/res/prog8lib/shared_cbm_diskio.p8 b/compiler/res/prog8lib/shared_cbm_diskio.p8
index 458dd5f9c..f97166381 100644
--- a/compiler/res/prog8lib/shared_cbm_diskio.p8
+++ b/compiler/res/prog8lib/shared_cbm_diskio.p8
@@ -366,7 +366,7 @@ close_end:
         while num_bytes!=0 {
             %asm {{
                 jsr  cbm.CHRIN
-m_in_buffer     sta  $ffff
+m_in_buffer     sta  $ffff          ; modified
                 inc  m_in_buffer+1
                 bne  +
                 inc  m_in_buffer+2
diff --git a/docs/source/software.rst b/docs/source/software.rst
index b7a548889..037878385 100644
--- a/docs/source/software.rst
+++ b/docs/source/software.rst
@@ -45,6 +45,12 @@ Various things:
 `Prog8 code for ZSMkit <https://github.com/mooinglemur/zsmkit/tree/main/p8demo>`_
     ZSMkit is an advanced music and sound effects engine for the Commander X16.
 
+`vtsbank: a library for affine transformation and rotation of sprites and tiles <https://github.com/tallLeRoy/vtsbank>`_
+    "VERA Tile Set and Sprite feature" is a module that provides all sorts
+    of routines to perform tile and sprite transformations and rotation, using
+    the VeraFX hardware feature. Includes examples.
+
+
 .. image:: _static/curious.png
     :align: center
     :alt: Curious
diff --git a/examples/cx16/pcmaudio/stream-simple-aflow.p8 b/examples/cx16/pcmaudio/stream-simple-aflow.p8
index 214be3a25..c0dfec6e7 100644
--- a/examples/cx16/pcmaudio/stream-simple-aflow.p8
+++ b/examples/cx16/pcmaudio/stream-simple-aflow.p8
@@ -88,10 +88,10 @@ interrupts {
             sta  _lp2+2
             ldx  #4
             ldy  #0
-_loop       lda  $ffff,y
+_loop       lda  $ffff,y        ; modified
             sta  cx16.VERA_AUDIO_DATA
             iny
-_lp2        lda  $ffff,y
+_lp2        lda  $ffff,y        ; modified
             sta  cx16.VERA_AUDIO_DATA
             iny
             bne  _loop
diff --git a/examples/cx16/pcmaudio/stream-simple-poll.p8 b/examples/cx16/pcmaudio/stream-simple-poll.p8
index ee8cc84c6..b9ebe5fb8 100644
--- a/examples/cx16/pcmaudio/stream-simple-poll.p8
+++ b/examples/cx16/pcmaudio/stream-simple-poll.p8
@@ -89,10 +89,10 @@ music {
             sta  _lp2+2
             ldx  #4
             ldy  #0
-_loop       lda  $ffff,y
+_loop       lda  $ffff,y    ; modified
             sta  cx16.VERA_AUDIO_DATA
             iny
-_lp2        lda  $ffff,y
+_lp2        lda  $ffff,y    ; modified
             sta  cx16.VERA_AUDIO_DATA
             iny
             bne  _loop
diff --git a/examples/cx16/pcmaudio/stream-wav.p8 b/examples/cx16/pcmaudio/stream-wav.p8
index 5bea754d2..b4ce964e2 100644
--- a/examples/cx16/pcmaudio/stream-wav.p8
+++ b/examples/cx16/pcmaudio/stream-wav.p8
@@ -237,11 +237,11 @@ music {
             sta  _lp2+2
             ldx  #4
             ldy  #0
-_loop       lda  $ffff,y
+_loop       lda  $ffff,y    ;modified
             eor  #$80       ; convert to signed
             sta  cx16.VERA_AUDIO_DATA
             iny
-_lp2        lda  $ffff,y
+_lp2        lda  $ffff,y    ; modified
             eor  #$80       ; convert to signed
             sta  cx16.VERA_AUDIO_DATA
             iny
@@ -274,10 +274,10 @@ _lp2        lda  $ffff,y
             sta  _lp2+2
             ldx  #4
             ldy  #0
-_loop       lda  $ffff,y
+_loop       lda  $ffff,y    ; modified
             sta  cx16.VERA_AUDIO_DATA
             iny
-_lp2        lda  $ffff,y
+_lp2        lda  $ffff,y    ; modified
             sta  cx16.VERA_AUDIO_DATA
             iny
             bne  _loop
diff --git a/examples/test.p8 b/examples/test.p8
index b8d480bb6..57a113bb4 100644
--- a/examples/test.p8
+++ b/examples/test.p8
@@ -1,17 +1,16 @@
 %import textio
 %zeropage basicsafe
-%option no_sysinit
+%option no_sysinit, romable
 
 main {
 
     sub start()  {
-        cx16.r0L = 25
+        uword @shared @nozp ptr
 
-        when cx16.r0L {
-            0 -> txt.print("zero")
-            1 -> txt.print("one")
-            21 to 29 step 2 -> txt.print("between 20 and 30 and odd")
-            else -> txt.print("something else")
-        }
+        cx16.r0L = @(ptr)
+
+        @(ptr)++
+
+        @(ptr)+=10
     }
 }