From 14778cde2df07491e9c2e8da0e8a1ab8724e6cec Mon Sep 17 00:00:00 2001
From: Joshua Wise <joshua@nyus.joshuawise.com>
Date: Sat, 19 Apr 2008 04:27:55 -0400
Subject: [PATCH] Say ABCD.

---
 diag.asm | 26 ++++++++++++++++++++++----
 1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/diag.asm b/diag.asm
index c832ff2..e7bb0d4 100644
--- a/diag.asm
+++ b/diag.asm
@@ -69,13 +69,31 @@ tiles:
 	db %11111100
 	db %00000000
 
+	db %01111100
+	db %11000110
+	db %11000010
+	db %11000000
+	db %11000010
+	db %11000110
+	db %01111100
+	db %00000000
+
+	db %11111100
+	db %11000110
+	db %11000110
+	db %11000110
+	db %11000110
+	db %11000110
+	db %11111100
+	db %00000000
+
 putscreen:
 	; Wait for vblank
 	call .vblwait
 
 	ld hl, $8000	; Copy two tiles.
 	ld de, tiles
-	ld c, $10
+	ld c, $20
 .cloop:	push hl
 	ld h, d
 	ld l, e
@@ -93,9 +111,9 @@ putscreen:
 .vloop:	call .vblwait
 	ld c, $40
 	ld b, 0
-.loop:	inc b
-	ld a, b
-	and $01
+.loop:	ld a, b
+	inc b
+	and $03
 	ld [hli], a
 	ld a, h
 	cp $9C
-- 
2.43.0