From 49e1ce4fd7dafc383168a1d2ed020ce88144c212 Mon Sep 17 00:00:00 2001
From: Peter Ferrie <peter.ferrie@gmail.com>
Date: Sat, 1 Jun 2019 00:04:55 -0400
Subject: [PATCH] optimize keypress_minimal

---
 pt3_player/keypress_minimal.s | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/pt3_player/keypress_minimal.s b/pt3_player/keypress_minimal.s
index f2e9a27e..16d7c815 100644
--- a/pt3_player/keypress_minimal.s
+++ b/pt3_player/keypress_minimal.s
@@ -7,40 +7,40 @@ get_key:
 
 	lda	KEYPRESS						; 3
 	bpl	no_key							; 2nt/3
+	bit	KEYRESET		; clear the keyboard buffer	; 4
 
 figure_out_key:
 	cmp	#' '+128		; the mask destroys space	; 2
 	beq	save_key		; so handle it specially	; 2nt/3
 
-	and	#$5f			; mask, to make upper-case	; 2
 check_right_arrow:
-	cmp	#$15							; 2
+	cmp	#$95							; 2
 	bne	check_left_arrow					; 2nt/3
 	lda	#'D'							; 2
 check_left_arrow:
-	cmp	#$08							; 2
+	cmp	#$88							; 2
 	bne	check_up_arrow						; 2nt/3
 	lda	#'A'							; 2
 check_up_arrow:
-	cmp	#$0B							; 2
+	cmp	#$8B							; 2
 	bne	check_down_arrow					; 2nt/3
 	lda	#'W'							; 2
 check_down_arrow:
-	cmp	#$0A							; 2
+	cmp	#$8A							; 2
 	bne	check_escape						; 2nt/3
 	lda	#'S'							; 2
 check_escape:
+	and	#$5f			; mask, to make upper-case	; 2
         cmp	#$1B							; 2
 	bne	save_key						; 2nt/3
 	lda	#'Q'							; 2
-	jmp	save_key						; 3
+	bne	save_key		; branch always			; 3
 
 no_key:
 	lda	#0			; no key, so save a zero	; 2
 
 save_key:
 	sta	LASTKEY			; save the key to our buffer	; 2
-	bit	KEYRESET		; clear the keyboard buffer	; 4
 	rts								; 6
 								;============