From 3ef2eee4b0b13e872b9d07f96a57b370260735f9 Mon Sep 17 00:00:00 2001
From: greg <elorian.mestec@gmail.com>
Date: Wed, 14 Dec 2016 03:42:46 -0800
Subject: [PATCH] Draw grid of faces

---
 test_gfx.asm | 27 +++++++++++++++++++++------
 1 file changed, 21 insertions(+), 6 deletions(-)

diff --git a/test_gfx.asm b/test_gfx.asm
index 8938fdb..43624f8 100644
--- a/test_gfx.asm
+++ b/test_gfx.asm
@@ -64,7 +64,7 @@ Start:
 
     ; size (last argument) depends on color mode
     ; location is beginning of VRAM
-    Load_Block_to_VRAM Face, $0000, (8*2*2),
+    Load_Block_to_VRAM Tiles, $0000, (8*2*2),
 
     ; put character data at VRAM $0000, tile data at $0400
     lda #$04
@@ -76,11 +76,24 @@ Start:
     lda #%00000001
     sta $212c ; enable bkg 1,
 
-    ldx #$04f0 ; load $0400 (VRAM address of tile data)
-    stx $2116  ; and store it to  VRAM address word-sized register
+    ldx #$0400 ; load $0400 (VRAM address of tile data)
+TileLoadLoop:
 
-    ldx #$0001
-    stx $2118  ;store tile map entry to the address specified in $2116 - this increments or not based on 2115
+    stx $2116  ; store VRAM address of tile data to VRAM address word-sized register
+
+    lda #$01   ; smile tile
+    sta $2118  ;store tile map entry to the address specified in $2116 - this increments or not based on 2115
+
+    inx
+    stx $2116
+
+    lda #$00 ; blank tile
+    sta $2118
+
+    inx
+
+    cpx #$0780 ; $400 - $780 seems to be limit of snes screen tile memory
+    bne TileLoadLoop
 
 
 lda #%10000001  ; enable NMI and joypads
@@ -112,11 +125,13 @@ mainloop:
 .org 0
 .section "TileData"
 
-Face:
+Tiles:
 
+;blank tile
     .db $00, $00, $00, $00, $00, $00, $00, $00
     .db $00, $00, $00, $00, $00, $00, $00, $00
 
+;face
     .db %00000000
     .db %00000000