shave some bytes

src/ui.common.a

@@ -178,13 +178,13 @@ WaitForKeyFor30Seconds
 ; yell at the user, but, like, gently
 ;
 ; in:    none
-; out:   all registers and flags preserved
+; out:   C clear
+;        Y preserved
+;        A=0
+;        X=0
+;        all flags preserved
 ;------------------------------------------------------------------------------
 SoftBell
-         php
-         pha
-         txa
-         pha
          ldx   #32
 -        lda   #2
          jsr   @wait
@@ -194,10 +194,7 @@ SoftBell
          bit   SPEAKER
          dex
          bne   -
-         pla
-         tax
-         pla
-         plp
+         clc
          rts
 @wait ; identical to $FCA8 ROM routine, but ROM is switched out when we need it
          sec

src/ui.search.mode.a

@@ -73,6 +73,9 @@ SearchMode
          bcc   .SearchModeInputLoop  ; if carry is clear, we're done
          bcs   SearchMode            ; if carry is set, force full redraw
 
+.OnError
+         jmp   SoftBell              ; Beep on invalid input and start over.
+
 .OnClear
          ldx   InputLength
          bne   +
@@ -80,19 +83,18 @@ SearchMode
          jmp   MegaAttractMode       ; mega-attract mode
 +        ldx   #0                    ; Esc with input clears the input
          stx   InputLength
-         jmp   .OnInputChanged
+         beq   .OnInputChanged       ; always branches
 
 .OnBack
          ldx   InputLength
-         bne   +
-         jmp   SoftBell
-+        dec   InputLength
+         beq   .OnError
+         dec   InputLength
          jmp   .OnInputChanged
 
 .OnTab
          ldx   SelectedIndex
          cpx   #$FF
-         beq   .ClearAndReturn
+         beq   .OnError
          jsr   MiniAttractMode
          cmp   #$8D                  ; if we exited mini attract mode
          beq   .OnLaunch             ; by pressing Enter, launch the game
@@ -102,7 +104,7 @@ SearchMode
 .OnLaunch
          ldx   SelectedIndex
          cpx   #$FF
-         beq   .ClearAndReturn
+         beq   .OnError
          jsr   PlayGameFromSearch
          sec                         ; tell caller to redraw UI
          rts
@@ -110,13 +112,8 @@ SearchMode
 .OnSearch
          ldx   InputLength
          cpx   #MaxInputLength
-         bne   +
-.OnError
-         jsr   SoftBell              ; Beep on invalid input and start over.
-.ClearAndReturn
-         clc
-         rts
-+        sta   InputBuffer,x
+         beq   .OnError
+         sta   InputBuffer,x
          inc   InputLength
          ; execution falls through here
 .OnInputChanged