First commit

8 files changed, 962 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..347990a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+tools/

+*.nes

+*.deb

+*.lst

+*.nl

+*.bin

+

diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..f6f8dd0
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "tools_sources/NesTiler"]
+	path = tools_sources/NesTiler
+	url = https://github.com/ClusterM/NesTiler.git
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..cfff82f
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,40 @@
+NESASM=tools/NESASM.EXE 
+EMU=fceux
+TILER=tools/NesTiler.exe
+TEXT_CONVERTER=tools/TextConverter.exe
+SOURCE=controller.asm
+EXECUTABLE=controller.nes
+BG_IMAGE=bg.png
+BITS_IMAGE=bits.png
+
+BG_PATTERN=bg_pattern_table.bin
+BG_NAME_TABLE=bg_name_table.bin
+BG_ATTR_TABLE=bg_attr_table.bin
+BITS_PATTERN=bits_pattern_table.bin
+PALETTE0=palette0.bin
+PALETTE1=palette1.bin
+
+all: $(EXECUTABLE)
+
+build: $(EXECUTABLE)
+
+$(EXECUTABLE): $(SOURCE) $(BG_PATTERN) $(BG_NAME_TABLE) $(BITS_PATTERN) $(PALETTE0) $(PALETTE1)
+	rm -f $(EXECUTABLE)
+	$(NESASM) $(SOURCE) -o $(EXECUTABLE) --symbols=$(EXECUTABLE) -iWss
+
+clean:
+	rm -f $(EXECUTABLE) *.lst *.nl *.bin
+
+run: $(EXECUTABLE)
+	$(EMU) $(EXECUTABLE)
+
+$(BG_PATTERN) $(BG_NAME_TABLE) $(BITS_PATTERN) $(PALETTE0) $(PALETTE1): $(BG_IMAGE) $(BITS_IMAGE)
+	$(TILER) -i0 $(BG_IMAGE) -i1 $(BITS_IMAGE) --enable-palettes 0,1 \
+  --out-pattern-table0 $(BG_PATTERN) \
+  --out-pattern-table1 $(BITS_PATTERN) \
+  --out-name-table0 $(BG_NAME_TABLE) \
+  --out-attribute-table0 $(BG_ATTR_TABLE) \
+  --bgcolor \#FFFFFF --palette1 \#0000FF \
+  --out-palette0 $(PALETTE0) --out-palette1 $(PALETTE1)
+  
+.PHONY: clean
diff --git a/bg.png b/bg.png
new file mode 100644
index 0000000..78c351c
--- /dev/null
+++ b/bg.png
diff --git a/bg.psd b/bg.psd
new file mode 100644
index 0000000..07297dc
--- /dev/null
+++ b/bg.psd
diff --git a/bits.png b/bits.png
new file mode 100644
index 0000000..4d55e69
--- /dev/null
+++ b/bits.png
diff --git a/controller.asm b/controller.asm
new file mode 100644
index 0000000..47ae350
--- /dev/null
+++ b/controller.asm
@@ -0,0 +1,912 @@
+; INES header stuff
+  .inesprg 1   ; 1 banks of PRG (16kbytes)
+  .ineschr 1   ; 1 bank of CHR (8kbytes)
+  .inesmir 0   ; mirroring doesn't matter
+  .inesmap 0   ; we use mapper 0 (no mapper)
+  
+  .rsset $0000 ; set the initial value of
+    ; the RS internal counter
+COPY_SOURCE_ADDR .rs 2
+COPY_DEST_ADDR   .rs 2
+
+  .bank 1     ; following goes in bank 1
+  .org $FFFA  ; start at $FFFA
+  .dw NMI
+  .dw Start
+  .dw IRQ
+
+  .bank 0
+  .org $C000  ; code starts at $C000
+  
+Start:
+  sei ; no interrupts
+
+  ; reset stack
+  ldx #$FF
+  txs 
+  
+  lda #%00000000 ; PPU disabled
+  sta PPUCTRL
+  sta PPUMASK  
+  jsr waitblank
+
+  ; clean memory
+  lda #$00
+  sta <COPY_SOURCE_ADDR
+  sta <COPY_SOURCE_ADDR+1
+  ldy #$02
+  ldx #$08
+.loop:
+  sta [COPY_SOURCE_ADDR], y
+  iny
+  bne .loop
+  inc <COPY_SOURCE_ADDR+1
+  dex
+  bne .loop
+
+  ; loading palette
+load_palette:
+  jsr waitblank
+  lda #$3F
+  sta PPUADDR
+  lda #$00
+  sta PPUADDR
+  ldx #$00
+.loop:
+  lda palette, x
+  sta PPUDATA
+  inx
+  cpx #8
+  bne .loop
+
+  ; loading nametable and attribute table to PPUCTRL @ PPU
+load_nametable:
+  lda #LOW(nametable)
+  sta <COPY_SOURCE_ADDR
+  lda #HIGH(nametable)
+  sta <COPY_SOURCE_ADDR+1
+  lda PPUSTATUS
+  lda #$20
+  sta PPUADDR
+  lda #$00
+  sta PPUADDR
+  ldy #0
+  ldx #4
+.loop:
+  lda [COPY_SOURCE_ADDR], y
+  sta PPUDATA
+  iny
+  bne .loop
+  inc <COPY_SOURCE_ADDR+1
+  dex
+  bne .loop
+
+load_drawing_offsets:
+  lda #LOW(draw_offsets)
+  sta <COPY_SOURCE_ADDR
+  lda #HIGH(draw_offsets) + $E0
+  sta <COPY_SOURCE_ADDR+1
+  lda #LOW(draw_offsets)
+  sta <COPY_DEST_ADDR
+  lda #HIGH(draw_offsets)
+  sta <COPY_DEST_ADDR+1
+  ldy #0
+  ldx #32
+.loop:
+  lda [COPY_SOURCE_ADDR], y
+  sta [COPY_DEST_ADDR], y
+  iny
+  dex
+  bne .loop
+
+load_drawing_routine:
+  lda #LOW(draw_bits)
+  sta <COPY_SOURCE_ADDR
+  lda #HIGH(draw_bits) + $E0
+  sta <COPY_SOURCE_ADDR+1
+  lda #LOW(draw_bits)
+  sta <COPY_DEST_ADDR
+  lda #HIGH(draw_bits)
+  sta <COPY_DEST_ADDR+1
+  ldy #0
+  ldx #6
+.loop:
+  lda [COPY_SOURCE_ADDR], y
+  sta [COPY_DEST_ADDR], y
+  iny
+  bne .loop
+  inc <COPY_SOURCE_ADDR+1
+  inc <COPY_DEST_ADDR+1
+  dex
+  bne .loop
+
+  ; call it
+  jsr draw_bits
+
+  ; enable PPU
+  jsr waitblank
+  ; show background
+  lda #%00001010
+  sta PPUMASK
+
+  ; main loop        
+infin:
+  jsr read_controller
+  jsr waitblank
+  jsr draw_bits
+  jsr fix_scroll
+  jmp infin
+
+read_controller:
+  ; strobe
+  ldx #1
+  stx JOY1
+  dex
+  stx JOY1
+  ldy #0
+.loop:
+  lda JOY1
+  lsr A
+  ldx #$8C
+  bcs .joy1_d0_1
+  inx
+  inx
+.joy1_d0_1:
+  pha
+  txa
+  sta [draw_offsets], y
+  pla
+
+  lsr A
+  ldx #$8C
+  bcs .joy1_d1_1
+  inx
+  inx
+.joy1_d1_1:
+  pha
+  txa
+  sta [draw_offsets + 2], y
+  pla
+
+  lsr A
+  ldx #$8C
+  bcs .joy1_d1_2
+  inx
+  inx
+.joy1_d1_2:
+  pha
+  txa
+  sta [draw_offsets + 4], y
+  pla
+
+  lsr A
+  ldx #$8C
+  bcs .joy1_d1_3
+  inx
+  inx
+.joy1_d1_3:
+  pha
+  txa
+  sta [draw_offsets + 6], y
+  pla
+
+  lsr A
+  ldx #$8C
+  bcs .joy1_d1_4
+  inx
+  inx
+.joy1_d1_4:
+  pha
+  txa
+  sta [draw_offsets + 8], y
+  pla
+
+  lsr A
+  ldx #$8C
+  bcs .joy1_d1_5
+  inx
+  inx
+.joy1_d1_5:
+  pha
+  txa
+  sta [draw_offsets + 10], y
+  pla
+
+  lsr A
+  ldx #$8C
+  bcs .joy1_d1_6
+  inx
+  inx
+.joy1_d1_6:
+  pha
+  txa
+  sta [draw_offsets + 12], y
+  pla
+
+  lsr A
+  ldx #$8C
+  bcs .joy1_d1_7
+  inx
+  inx
+.joy1_d1_7:
+  pha
+  txa
+  sta [draw_offsets + 14], y
+  pla
+
+  lda JOY2
+
+  lsr A
+  ldx #$8C
+  bcs .joy2_d0_1
+  inx
+  inx
+.joy2_d0_1:
+  pha
+  txa
+  sta [draw_offsets + 16], y
+  pla
+
+  lsr A
+  ldx #$8C
+  bcs .joy2_d1_1
+  inx
+  inx
+.joy2_d1_1:
+  pha
+  txa
+  sta [draw_offsets + 18], y
+  pla
+
+  lsr A
+  ldx #$8C
+  bcs .joy2_d1_2
+  inx
+  inx
+.joy2_d1_2:
+  pha
+  txa
+  sta [draw_offsets + 20], y
+  pla
+
+  lsr A
+  ldx #$8C
+  bcs .joy2_d1_3
+  inx
+  inx
+.joy2_d1_3:
+  pha
+  txa
+  sta [draw_offsets + 22], y
+  pla
+
+  lsr A
+  ldx #$8C
+  bcs .joy2_d1_4
+  inx
+  inx
+.joy2_d1_4:
+  pha
+  txa
+  sta [draw_offsets + 24], y
+  pla
+
+  lsr A
+  ldx #$8C
+  bcs .joy2_d1_5
+  inx
+  inx
+.joy2_d1_5:
+  pha
+  txa
+  sta [draw_offsets + 26], y
+  pla
+
+  lsr A
+  ldx #$8C
+  bcs .joy2_d1_6
+  inx
+  inx
+.joy2_d1_6:
+  pha
+  txa
+  sta [draw_offsets + 28], y
+  pla
+
+  lsr A
+  ldx #$8C
+  bcs .joy2_d1_7
+  inx
+  inx
+.joy2_d1_7:
+  pha
+  txa
+  sta [draw_offsets + 30], y
+  pla
+
+  iny
+  iny
+  iny
+  cpy #24
+  bne .not24
+  iny
+  iny
+  iny
+ .not24:
+  cpy #51
+  bne .not51
+  iny
+  iny
+  iny
+.not51:
+  cpy #78
+  beq .end
+  jmp .loop  
+.end:
+  rts
+
+waitblank:
+  jsr fix_scroll
+  pha
+  bit PPUSTATUS
+.loop:
+  lda PPUSTATUS  ; load A with value at location PPUSTATUS
+  bpl .loop  ; if bit 7 is not set (not VBlank) keep checking
+  pla
+  rts
+
+fix_scroll:
+  ; fix scrolling
+  bit PPUSTATUS
+  lda #0
+  sta PPUSCROLL
+  sta PPUSCROLL
+  rts
+
+IRQ:  
+  rti
+
+NMI:  
+  rti
+
+nametable:
+  .incbin "bg_name_table.bin"
+  .org nametable + $3C0
+  .incbin "bg_attr_table.bin"
+palette: 
+  .incbin "palette0.bin"
+  .incbin "palette1.bin"
+
+  .bank 1
+  .org $0100 - 32
+draw_offsets:
+  .dw draw_bits + $0013 + ($5A * 0), draw_bits + $0013 + ($5A * 1), draw_bits + $0013 + ($5A * 2), draw_bits + $0013 + ($5A * 3)
+  .dw draw_bits + $0013 + ($5A * 4), draw_bits + $0013 + ($5A * 5), draw_bits + $0013 + ($5A * 6), draw_bits + $0013 + ($5A * 7)
+  .dw draw_bits + $0013 + ($5A * 8), draw_bits + $0013 + ($5A * 9), draw_bits + $0013 + ($5A * 10), draw_bits + $0013 + ($5A * 11)
+  .dw draw_bits + $0013 + ($5A * 12), draw_bits + $0013 + ($5A * 13), draw_bits + $0013 + ($5A * 14), draw_bits + $0013 + ($5A * 15)
+  
+  .org $0200
+draw_bits:
+  ldx #$FD
+  ldy #$FE
+  bit PPUSTATUS
+
+  lda #$20
+  sta PPUADDR
+  lda #$84
+  sta PPUADDR
+  lda #$FF
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+
+  lda #$20
+  sta PPUADDR
+  lda #$A4
+  sta PPUADDR
+  lda #$FF
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+
+  lda #$20
+  sta PPUADDR
+  lda #$C4
+  sta PPUADDR
+  lda #$FF
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+
+  lda #$20
+  sta PPUADDR
+  lda #$E4
+  sta PPUADDR
+  lda #$FF
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+
+  lda #$21
+  sta PPUADDR
+  lda #$04
+  sta PPUADDR
+  lda #$FF
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+
+  lda #$21
+  sta PPUADDR
+  lda #$24
+  sta PPUADDR
+  lda #$FF
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+
+  lda #$21
+  sta PPUADDR
+  lda #$44
+  sta PPUADDR
+  lda #$FF
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+
+  lda #$21
+  sta PPUADDR
+  lda #$64
+  sta PPUADDR
+  lda #$FF
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+
+  lda #$22
+  sta PPUADDR
+  lda #$04
+  sta PPUADDR
+  lda #$FF
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+
+  lda #$22
+  sta PPUADDR
+  lda #$24
+  sta PPUADDR
+  lda #$FF
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+
+  lda #$22
+  sta PPUADDR
+  lda #$44
+  sta PPUADDR
+  lda #$FF
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+
+  lda #$22
+  sta PPUADDR
+  lda #$64
+  sta PPUADDR
+  lda #$FF
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+
+  lda #$22
+  sta PPUADDR
+  lda #$84
+  sta PPUADDR
+  lda #$FF
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+
+  lda #$22
+  sta PPUADDR
+  lda #$A4
+  sta PPUADDR
+  lda #$FF
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+
+  lda #$22
+  sta PPUADDR
+  lda #$C4
+  sta PPUADDR
+  lda #$FF
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+
+  lda #$22
+  sta PPUADDR
+  lda #$E4
+  sta PPUADDR
+  lda #$FF
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  sta PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+  stx PPUDATA
+
+  rts
+
+  .bank 2   ; switch to bank 4 (CHR bank 0)
+  .org $0000  ; start at $0000
+  .incbin "bg_pattern_table.bin"
+  .org $0FD0
+  .incbin "bits_pattern_table.bin"
diff --git a/tools_sources/NesTiler b/tools_sources/NesTiler
new file mode 160000
+Subproject f8b7349e7b6de6b393c0c8c771c6fd5f3f6b749