From: Joshua Wise <joshua@nyus.joshuawise.com>
Date: Sat, 19 Apr 2008 09:48:37 +0000 (-0400)
Subject: Modify the diagrom to test two byte insns
X-Git-Url: http://git.joshuawise.com/fpgaboy.git/commitdiff_plain/ee31adcb22c5011aeaaa0149ee22fa18e45317a5

Modify the diagrom to test two byte insns
---

diff --git a/diag.asm b/diag.asm
index e9a9f19..e9fff6a 100644
--- a/diag.asm
+++ b/diag.asm
@@ -141,30 +141,19 @@ vbl:
 	ld [$FF0F], a
 
 	ld a, [$FF51]
-	ld b, a
-	and $80
-	cp $80
-	jr nz, .nothing
-	ld c, $0
+	bit 7, a
+	jr z, .nothing
 
-	ld a, b
-	and $1
-	cp c
+	bit 0, a
 	call nz, .scyup
 	
-	ld a, b
-	and $2
-	cp c
+	bit 1, a
 	call nz, .scydown
 	
-	ld a, b
-	and $4
-	cp c
+	bit 2, a
 	call nz, .scxup
 	
-	ld a, b
-	and $8
-	cp c
+	bit 3, a
 	call nz, .scxdown
 
 .nothing: