From 7935a974fd0b53a6b58b00fa6aeb1d82b69481e4 Mon Sep 17 00:00:00 2001
From: droniu <dron.official@yahoo.com>
Date: Sun, 25 Apr 2021 14:33:12 +0200
Subject: [PATCH] background experminets

---
 simple/grid.bin       | Bin 0 -> 16384 bytes
 simple/hellomario.chr | Bin 0 -> 8192 bytes
 simple/main.s         |  44 ++++++++++++++++++++++++++++++++++++++++--
 simple/make.bat       |   2 ++
 simple/smile.bin      | Bin 0 -> 1024 bytes
 simple/world.bin      | Bin 0 -> 960 bytes
 6 files changed, 44 insertions(+), 2 deletions(-)
 create mode 100644 simple/grid.bin
 create mode 100644 simple/hellomario.chr
 create mode 100644 simple/make.bat
 create mode 100644 simple/smile.bin
 create mode 100644 simple/world.bin

diff --git a/simple/grid.bin b/simple/grid.bin
new file mode 100644
index 0000000000000000000000000000000000000000..14c04275b02f15da09c994cf367ce08073b1393b
GIT binary patch
literal 16384
zcmeIzF%E<<3<N;_|LI(fn=QPc6B@e6cw-L**X3ynobhb4N8H)wJ>B1)x1DGIX9e2d
ztDTp&pZ9(3oc7<=r`NybZRbh-_P+}xuT;OM9sj=swyaO@ubr1Xv3+{QhVVi=FI=}S
zx94r=trrXd?RndIVf=NuJ#Ra2y`TUB1PBlyK!5-N0t5&UAV7cs0RjXF5FkK+009C7
e2oNAZfB*pk1PBlyK!5-N0t5&UAV7e?%K|@sYCP@$

literal 0
HcmV?d00001

diff --git a/simple/hellomario.chr b/simple/hellomario.chr
new file mode 100644
index 0000000000000000000000000000000000000000..45c403a9983cb586185a0f05ab7913407e422f64
GIT binary patch
literal 8192
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l<b@eNG98ReA7FjAM-Jf6I7Jm%u#Kf21l+Z4PVl;e{2v>TF0B9n

literal 0
HcmV?d00001

diff --git a/simple/main.s b/simple/main.s
index cc780f7..d95fdcc 100644
--- a/simple/main.s
+++ b/simple/main.s
@@ -10,6 +10,7 @@
     .byte $00
     .byte $00, $00, $00, $00, $00 ; filler bytes
 .segment "ZEROPAGE"
+    background: .res 2
 .segment "STARTUP" ; where code starts
     Reset:
         sei ; disables all interrupts on NES
@@ -81,9 +82,45 @@
         cpx #$20 ; 32 in decimal
         bne LoadPalettes
 
+        ; initialize world variable to point to world data
+        lda #<BGData
+        sta background
+        lda #>BGData
+        sta background+1
+
+        ; setup address in PPU for nametable data
+        bit $2002
+        lda #$20
+        sta $2006
+        lda #$00
+        sta $2006        
+
+
+        ldx #$00
+        ldy #$00
+
+    LoadBackground:
+        lda (background), Y
+        sta $2007
+        iny
+        ; 960 px is 03 C0 in hex
+        cpx #$03
+        bne :+
+        cpy #$C0
+        beq DoneLoadingBG
+    :
+        cpy #$00
+        bne LoadBackground
+        inx
+        inc background+1
+        jmp LoadBackground
+
+
+    DoneLoadingBG:
         ldx #$00
     
     LoadSprites:
+
         lda SpriteData, X
         sta $0200, X
         inx
@@ -149,9 +186,12 @@
         .byte $20, $06, $00, $08
         .byte $20, $07, $00, $10
 
-  
+    BGData:
+        .incbin "grid.bin"
+
+
 .segment "VECTORS" ; special address which 6502 needs
     .word NMI ; refresh time
     .word Reset ; reset button
 .segment "CHARS" ; graphical data
-    .incbin "example_sprites.chr"
\ No newline at end of file
+    .incbin "tictactoe.chr"
\ No newline at end of file
diff --git a/simple/make.bat b/simple/make.bat
new file mode 100644
index 0000000..92ec157
--- /dev/null
+++ b/simple/make.bat
@@ -0,0 +1,2 @@
+ca65 main.s -g -o main.o --debug-info
+ld65 main.o -o main.nes -t nes --dbgfile main.dbg
\ No newline at end of file
diff --git a/simple/smile.bin b/simple/smile.bin
new file mode 100644
index 0000000000000000000000000000000000000000..1c22c1ee9ebf14bee1791c239fd81b82d2399adb
GIT binary patch
literal 1024
zcmdUs!4<$D2t!?>`>$Go1Os~Tss{z~lc((%53LXDcxBT<Se1YjiHKw+Wkh68EayI$
z9Ss0By#h%G=Q}NykoBc*SZ1o<!niUt@|Aa_=^A*>XF{A}rxpLl6~b{Fg-?@BulDtU
b@VF-P0#JK9$Hh>ZmgsL_j-L8Boj+aw`#}jD

literal 0
HcmV?d00001

diff --git a/simple/world.bin b/simple/world.bin
new file mode 100644
index 0000000000000000000000000000000000000000..36f2e3e31061aacb2ba64e5f12bb1c002c240a40
GIT binary patch
literal 960
zcmZQz7zLvtKtc$(x(0{1y5iR0?j9QE?v7i2n8|F}iXU#<jvwOJy=5zY-P^VU01%vB
ALjV8(

literal 0
HcmV?d00001