diff --git a/compiler/res/prog8lib/conv.p8 b/compiler/res/prog8lib/conv.p8
index 259911773..63f937b67 100644
--- a/compiler/res/prog8lib/conv.p8
+++ b/compiler/res/prog8lib/conv.p8
@@ -508,8 +508,7 @@ asmsub  ubyte2decimal  (ubyte value @A) -> ubyte @Y, ubyte @A, ubyte @X  {
 	; ---- A to decimal string in Y/A/X  (100s in Y, 10s in A, 1s in X)
 	%asm {{
 		ldy  #uword2decimal.ASCII_0_OFFSET
-		bne  uword2decimal.hex_try200
-		rts
+		jmp  uword2decimal.hex_try200
 	}}
 }
 
diff --git a/compiler/res/prog8lib/cx16/textio.p8 b/compiler/res/prog8lib/cx16/textio.p8
index cb352c572..3876e92c6 100644
--- a/compiler/res/prog8lib/cx16/textio.p8
+++ b/compiler/res/prog8lib/cx16/textio.p8
@@ -238,7 +238,7 @@ _lx     ldx  #0                ; modified
 	}}
 }
 
-asmsub  scroll_right() clobbers(A)  {
+asmsub  scroll_right() clobbers(A,Y)  {
 	; ---- scroll the whole screen 1 character to the right
 	;      contents of the leftmost column are unchanged, you should clear/refill this yourself
 	%asm {{
diff --git a/docs/source/programming.rst b/docs/source/programming.rst
index df2fa8748..2aa2131f7 100644
--- a/docs/source/programming.rst
+++ b/docs/source/programming.rst
@@ -949,11 +949,13 @@ rsave, rsavex
     It's not needed to rsave()/rsavex() before an asm subroutine that clobbers the X register
     (which is used by prog8 as the internal evaluation stack pointer);
     the compiler will take care of this situation automatically.
-    Note: the 16 bit 'virtual' registers of the Commander X16 are *not* saved.
+    Note: the 16 bit 'virtual' registers of the Commander X16 are *not* saved,
+    but you can use ``cx16.save_virtual_registers()`` for that.
 
 rrestore, rrestorex
     Restore all registers including status (or only X) back from the cpu hardware stack
-    Note: the 16 bit 'virtual' registers of the Commander X16 are *not* restored.
+    Note: the 16 bit 'virtual' registers of the Commander X16 are *not* restored,
+    but you can use ``cx16.restore_virtual_registers()`` for that.
 
 
 Library routines