diff --git a/presets/nes/Makefile b/presets/nes/Makefile
new file mode 100644
index 00000000..ed9c55c7
--- /dev/null
+++ b/presets/nes/Makefile
@@ -0,0 +1,3 @@
+
+test.rom: ex2.asm nesdefs.asm nesppu.asm
+	dasm ex2.asm
diff --git a/presets/nes/crypto.c b/presets/nes/crypto.c
index 11b1c0fc..577b3add 100644
--- a/presets/nes/crypto.c
+++ b/presets/nes/crypto.c
@@ -1,9 +1,6 @@
 
 #include "neslib.h"
 
-#pragma data-name (push,"CHARS")
-#pragma data-name (pop)
-
 //#define DEBUG
 #define HAS_DEBUGGER
 
diff --git a/presets/nes/ex1.asm b/presets/nes/ex1.asm
index 90fc13d9..ced63e84 100644
--- a/presets/nes/ex1.asm
+++ b/presets/nes/ex1.asm
@@ -1,4 +1,4 @@
-
+
 	include "nesdefs.asm"
 
 ;;;;; VARIABLES
@@ -6,11 +6,9 @@
 	seg.u RAM
 	org $0
 
-ScrollPos	byte	; used during NMI
-
 ;;;;; NES CARTRIDGE HEADER
 
-	NES_HEADER 0,2,1,0 ; mapper 0, 2 PRGs, 1 CHR, vertical
+	NES_HEADER 0,2,1,0 ; mapper 0, 2 PRGs, 1 CHR, horiz. mirror
 
 ;;;;; START OF CODE
 
@@ -18,9 +16,9 @@ Start:
 	NES_INIT	; set up stack pointer, turn off PPU
         jsr WaitSync	; wait for VSYNC
         jsr ClearRAM	; clear RAM
-	jsr SetPalette	; set palette colors
-        jsr FillVRAM	; set PPU video RAM
         jsr WaitSync	; wait for VSYNC (and PPU warmup)
+	jsr SetPalette	; set palette colors
+        jsr HelloVRAM	; set PPU video RAM
         lda #0
         sta PPU_ADDR
         sta PPU_ADDR	; PPU addr = $0000
@@ -28,43 +26,47 @@ Start:
         sta PPU_SCROLL  ; scroll = $0000
         lda #CTRL_NMI
         sta PPU_CTRL	; enable NMI
-        lda #MASK_SPR|MASK_BG|MASK_SPR_CLIP|MASK_BG_CLIP
+        lda #MASK_BG
         sta PPU_MASK 	; enable rendering
 .endless
 	jmp .endless	; endless loop
 
-; fill video RAM
-FillVRAM: subroutine
-	txa
+; fill video RAM with "Hello World" msg
+HelloVRAM: subroutine
 	ldy #$20
+        lda #$21	; PPU addr = $2021
 	sty PPU_ADDR
-	sta PPU_ADDR	; PPU addr = $2000
-	ldy #$10	; $10 (16) 256-byte pages
+	sta PPU_ADDR	; -> PPU_ADDR
+	ldy #0
 .loop:
-	sta PPU_DATA	; write to VRAM
-        adc #7		; add 7 to make randomish pattern
-	inx
-	bne .loop
-	dey		; next page
-	bne .loop	; out of pages?
-        rts
+	lda HelloMsg,y	; get next character
+        beq .end	; is 0? exit loop
+	sta PPU_DATA	; store+advance PPU
+        iny		; next character
+	bne .loop	; loop
+.end
+        rts		; return to caller
+
+; ASCII message to display on screen
+HelloMsg:
+	.byte "Hello, World!"
+        .byte 0		; zero terminator
 
 ; set palette colors
 SetPalette: subroutine
         ldy #$00
 	lda #$3f
 	sta PPU_ADDR
-	sty PPU_ADDR	; PPU addr = 0x3f00
-	ldx #32		; 32 palette colors
+	sty PPU_ADDR
+	ldx #32
 .loop:
-	lda Palette,y	; load from ROM
-	sta PPU_DATA	; store to palette
+	lda Palette,y
+	sta PPU_DATA
         iny
 	dex
-	bne .loop	; loop until 32 colors stored
+	bne .loop
         rts
 
-
 ;;;;; COMMON SUBROUTINES
 
 	include "nesppu.asm"
@@ -72,16 +74,6 @@ SetPalette: subroutine
 ;;;;; INTERRUPT HANDLERS
 
 NMIHandler:
-; save registers
-	pha	; save A
-; update scroll position (must be done after VRAM updates)
-	inc ScrollPos
-        lda ScrollPos
-        sta PPU_SCROLL	; X scroll position
-        lda #0
-        sta PPU_SCROLL	; Y scroll position
-; reload registers
-        pla	; reload A
 	rti
 
 ;;;;; CONSTANT DATA
@@ -89,10 +81,10 @@ NMIHandler:
 	align $100
 Palette:
 	hex 1f		;background
-	hex 09091900	;bg0
+	hex 09092c00	;bg0
         hex 09091900	;bg1
-        hex 09091900	;bg2
-        hex 09091900	;bg3
+        hex 09091500	;bg2
+        hex 09092500	;bg3
 
 ;;;;; CPU VECTORS
 
@@ -101,13 +93,5 @@ Palette:
 ;;;;; TILE SETS
 
 	org $10000
-	REPEAT 64
-	hex 003c6666766e663c007e181818381818
-        hex 007e60300c06663c003c66061c06663c
-        hex 0006067f661e0e06003c6606067c607e
-        hex 003c66667c60663c00181818180c667e
-        hex 003c66663c66663c003c66063e66663c
-        hex 01010101010101010000000000000000
-        hex ff000000000000000000000000000000
-        hex 01020408102040800000000000000000
-	REPEND
+        incbin "jroatch.chr"
+
diff --git a/presets/nes/ex2.asm b/presets/nes/ex2.asm
index 2109b985..906f4acb 100644
--- a/presets/nes/ex2.asm
+++ b/presets/nes/ex2.asm
@@ -7,38 +7,32 @@
 	org $0
 
 ScrollPos	byte	; used during NMI
-Rand		byte
-Temp1		byte
-
-SpriteBuf	equ	$200
 
 ;;;;; NES CARTRIDGE HEADER
 
-	NES_HEADER 0,2,1,0 ; mapper 0, 2 PRGs, 1 CHR, vertical
+	NES_HEADER 0,2,1,0 ; mapper 0, 2 PRGs, 1 CHR, horiz. mirror
 
 ;;;;; START OF CODE
 
 Start:
-	NES_INIT		; set up stack pointer, turn off PPU
-        jsr WaitSync
-        jsr WaitSync
-        jsr ClearRAM
-        jsr WaitSync		;wait for VSYNC
-	jsr SetPalette		;set colors
-        jsr FillVRAM		;set PPU RAM
-        jsr WaitSync		;wait for VSYNC (and PPU warmup)
-        jsr InitSprites
+	NES_INIT	; set up stack pointer, turn off PPU
+        jsr WaitSync	; wait for VSYNC
+        jsr ClearRAM	; clear RAM
+        jsr WaitSync	; wait for VSYNC (and PPU warmup)
+
+	jsr SetPalette	; set palette colors
+        jsr FillVRAM	; set PPU video RAM
         lda #0
         sta PPU_ADDR
-        sta PPU_ADDR		;PPU addr = 0
+        sta PPU_ADDR	; PPU addr = $0000
         sta PPU_SCROLL
-        sta PPU_SCROLL		;scroll = 0
-        lda #$90
-        sta PPU_CTRL		;enable NMI
-        lda #$1e
-        sta PPU_MASK		;enable rendering
+        sta PPU_SCROLL  ; scroll = $0000
+        lda #CTRL_NMI
+        sta PPU_CTRL	; enable NMI
+        lda #MASK_BG
+        sta PPU_MASK 	; enable rendering
 .endless
-	jmp .endless		;endless loop
+	jmp .endless	; endless loop
 
 ; fill video RAM
 FillVRAM: subroutine
@@ -48,44 +42,14 @@ FillVRAM: subroutine
 	sta PPU_ADDR
 	ldy #$10
 .loop:
-	sta PPU_DATA
-        adc #7
+	stx PPU_DATA
 	inx
 	bne .loop
 	dey
 	bne .loop
         rts
 
-;
-InitSprites: subroutine
-	lda #1
-        ldx #0
-.loop
-	sta SpriteBuf,x
-        jsr NextRandom
-        inx
-        bne .loop
-        rts
-
-;
-MoveSprites: subroutine
-	lda #1
-        ldx #0
-.loop
-	sta Temp1
-	lda Temp1
-        and #3
-        clc
-        adc SpriteBuf,x
-	sta SpriteBuf,x
-        lda Temp1
-        jsr NextRandom
-        inx
-        bne .loop
-        rts
-
 ; set palette colors
-
 SetPalette: subroutine
         ldy #$00
 	lda #$3f
@@ -110,22 +74,12 @@ SetPalette: subroutine
 NMIHandler:
 ; save registers
 	pha	; save A
-; load sprites
-	lda #$02
-        sta PPU_OAM_DMA
 ; update scroll position (must be done after VRAM updates)
 	inc ScrollPos
         lda ScrollPos
-        sta PPU_SCROLL
+        sta PPU_SCROLL	; horiz byte
         lda #0
-        sta PPU_SCROLL
-; TODO: write high bits to PPUCTRL
-	lda ScrollPos
-        and #0
-	ora #$90	; enable NMI
-        sta PPU_CTRL
-; move sprites
-	jsr MoveSprites
+        sta PPU_SCROLL	; vert byte
 ; reload registers
         pla	; reload A
 	rti
@@ -135,14 +89,10 @@ NMIHandler:
 	align $100
 Palette:
 	hex 1f		;background
-	hex 09091900	;bg0
+	hex 09092c00	;bg0
         hex 09091900	;bg1
-        hex 09091900	;bg2
-        hex 09091900	;bg3
-        hex 14243400	;sp0
-        hex 15253500	;sp1
-        hex 16263600	;sp2
-        hex 17273700	;sp3
+        hex 09091500	;bg2
+        hex 09092500	;bg3
 
 ;;;;; CPU VECTORS
 
@@ -151,13 +101,5 @@ Palette:
 ;;;;; TILE SETS
 
 	org $10000
-	REPEAT 64
-	hex 003c6666766e663c007e181818381818
-        hex 007e60300c06663c003c66061c06663c
-        hex 0006067f661e0e06003c6606067c607e
-        hex 003c66667c60663c00181818180c667e
-        hex 003c66663c66663c003c66063e66663c
-        hex 01010101010101010000000000000000
-        hex ff000000000000000000000000000000
-        hex 01020408102040800000000000000000
-	REPEND
+        incbin "jroatch.chr"
+
diff --git a/presets/nes/ex3.asm b/presets/nes/ex3.asm
new file mode 100644
index 00000000..49c69da7
--- /dev/null
+++ b/presets/nes/ex3.asm
@@ -0,0 +1,146 @@
+
+	include "nesdefs.asm"
+
+;;;;; VARIABLES
+
+	seg.u RAM
+	org $0
+
+ScrollPos	byte	; used during NMI
+Rand		byte
+Temp1		byte
+
+SpriteBuf	equ	$200
+
+;;;;; NES CARTRIDGE HEADER
+
+	NES_HEADER 0,2,1,0 ; mapper 0, 2 PRGs, 1 CHR, horiz. mirror
+
+;;;;; START OF CODE
+
+Start:
+	NES_INIT		; set up stack pointer, turn off PPU
+        jsr WaitSync
+        jsr WaitSync
+        jsr ClearRAM
+        jsr WaitSync		;wait for VSYNC
+	jsr SetPalette		;set colors
+        jsr FillVRAM		;set PPU RAM
+        jsr WaitSync		;wait for VSYNC (and PPU warmup)
+        jsr InitSprites
+        lda #0
+        sta PPU_ADDR
+        sta PPU_ADDR		;PPU addr = 0
+        sta PPU_SCROLL
+        sta PPU_SCROLL		;scroll = 0
+        lda #CTRL_NMI
+        sta PPU_CTRL	; enable NMI
+        lda #MASK_BG|MASK_SPR
+        sta PPU_MASK 	; enable rendering
+.endless
+	jmp .endless		;endless loop
+
+; fill video RAM
+FillVRAM: subroutine
+	txa
+	ldy #$20
+	sty PPU_ADDR
+	sta PPU_ADDR
+	ldy #$10
+.loop:
+	stx PPU_DATA
+	inx
+	bne .loop
+	dey
+	bne .loop
+        rts
+
+;
+InitSprites: subroutine
+	lda #1
+        ldx #0
+.loop
+	sta SpriteBuf,x
+        jsr NextRandom
+        inx
+        bne .loop
+        rts
+
+;
+MoveSprites: subroutine
+	lda #1
+        ldx #0
+.loop
+	sta Temp1
+        and #3
+        clc
+        adc SpriteBuf,x
+	sta SpriteBuf,x
+        lda Temp1
+        jsr NextRandom
+        inx
+        bne .loop
+        rts
+
+; set palette colors
+
+SetPalette: subroutine
+        ldy #$00
+	lda #$3f
+	sta PPU_ADDR
+	sty PPU_ADDR
+	ldx #32
+.loop:
+	lda Palette,y
+	sta PPU_DATA
+        iny
+	dex
+	bne .loop
+        rts
+
+
+;;;;; COMMON SUBROUTINES
+
+	include "nesppu.asm"
+
+;;;;; INTERRUPT HANDLERS
+
+NMIHandler:
+	SAVE_REGS
+; load sprites
+	lda #$02
+        sta PPU_OAM_DMA
+; update scroll position (must be done after VRAM updates)
+	inc ScrollPos
+        lda ScrollPos
+        sta PPU_SCROLL
+        lda #0
+        sta PPU_SCROLL
+; move sprites
+	jsr MoveSprites
+; reload registers
+        RESTORE_REGS
+	rti
+
+;;;;; CONSTANT DATA
+
+	align $100
+Palette:
+	hex 1f		;background
+	hex 09090000	;bg0
+        hex 09090c00	;bg1
+        hex 09091c00	;bg2
+        hex 09092c00	;bg3
+        hex 14243400	;sp0
+        hex 15253500	;sp1
+        hex 16263600	;sp2
+        hex 17273700	;sp3
+
+;;;;; CPU VECTORS
+
+	NES_VECTORS
+
+;;;;; TILE SETS
+
+	org $10000
+        incbin "jroatch.chr"
diff --git a/presets/nes/jroatch.c b/presets/nes/jroatch.c
new file mode 100644
index 00000000..5bfb1cc0
--- /dev/null
+++ b/presets/nes/jroatch.c
@@ -0,0 +1,344 @@
+const unsigned char jroatch_chr[] = {
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0xff, 0xff, 0xff, 0xff, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0xaa, 0x55, 0xaa,
+  0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0xaa, 0x55, 0xaa,
+  0x55, 0xaa, 0x55, 0xaa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55,
+  0xaa, 0x55, 0xaa, 0x55, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0x55, 0xaa, 0x55, 0xaa,
+  0x55, 0xaa, 0x55, 0xaa, 0x33, 0xcc, 0x33, 0xcc, 0x33, 0xcc, 0x33, 0xcc,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x33, 0xcc, 0x33, 0xcc,
+  0x33, 0xcc, 0x33, 0xcc, 0x33, 0xcc, 0x33, 0xcc, 0x33, 0xcc, 0x33, 0xcc,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x33, 0xcc, 0x33, 0xcc,
+  0x33, 0xcc, 0x33, 0xcc, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0xcc, 0x33, 0xcc, 0x33, 0xcc, 0x33, 0xcc, 0x33, 0xcc, 0x33, 0xcc, 0x33,
+  0xcc, 0x33, 0xcc, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0xcc, 0x33, 0xcc, 0x33, 0xcc, 0x33, 0xcc, 0x33, 0x33, 0xcc, 0x33, 0xcc,
+  0x33, 0xcc, 0x33, 0xcc, 0x3e, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x3e,
+  0x3c, 0x42, 0x5a, 0x52, 0x5a, 0x42, 0x3c, 0x00, 0xfe, 0xff, 0x7f, 0x7b,
+  0x7b, 0x00, 0x00, 0x00, 0xf4, 0x4a, 0x52, 0x52, 0x00, 0x00, 0x00, 0x00,
+  0x0f, 0x0f, 0x0f, 0x3f, 0x7e, 0x7e, 0x7e, 0x3c, 0x0e, 0x06, 0x0a, 0x38,
+  0x6c, 0x6c, 0x38, 0x00, 0x3c, 0x7e, 0x7e, 0x7e, 0x3c, 0x3c, 0x3c, 0x18,
+  0x38, 0x6c, 0x6c, 0x38, 0x10, 0x38, 0x10, 0x00, 0x18, 0x3c, 0x7e, 0xff,
+  0xff, 0xff, 0x3c, 0x3c, 0x10, 0x38, 0x7c, 0xfe, 0xee, 0x10, 0x38, 0x00,
+  0x7e, 0xff, 0xff, 0xff, 0xff, 0x7e, 0x3c, 0x18, 0x6c, 0xfe, 0xfe, 0xfe,
+  0x7c, 0x38, 0x10, 0x00, 0x18, 0x3c, 0x7e, 0xff, 0xff, 0x7e, 0x3c, 0x18,
+  0x10, 0x38, 0x7c, 0xfe, 0x7c, 0x38, 0x10, 0x00, 0x3c, 0x7e, 0x7e, 0xff,
+  0xff, 0xff, 0x3c, 0x3c, 0x38, 0x7c, 0x38, 0xfe, 0xd6, 0x10, 0x38, 0x00,
+  0x18, 0x3c, 0xff, 0xff, 0x7e, 0x7e, 0x7e, 0x7e, 0x10, 0x38, 0xfe, 0x7c,
+  0x38, 0x7c, 0x6c, 0x00, 0x0f, 0x1f, 0x7f, 0xff, 0xfc, 0xfc, 0xfc, 0x78,
+  0x0a, 0x14, 0x72, 0xf8, 0xf8, 0xf8, 0x70, 0x00, 0x00, 0x00, 0xff, 0xff,
+  0xf6, 0xf6, 0xf6, 0xf6, 0x00, 0x00, 0xee, 0x84, 0xe4, 0x24, 0xe4, 0x00,
+  0x00, 0x00, 0xfc, 0xfc, 0xfc, 0xfc, 0xff, 0xff, 0x00, 0x00, 0xe8, 0x88,
+  0xe8, 0x28, 0xee, 0x00, 0x18, 0x3c, 0x7e, 0xff, 0xff, 0xdb, 0x18, 0x18,
+  0x10, 0x38, 0x7c, 0xd6, 0x92, 0x10, 0x10, 0x00, 0x18, 0x18, 0xdb, 0xff,
+  0xff, 0x7e, 0x3c, 0x18, 0x10, 0x10, 0x92, 0xd6, 0x7c, 0x38, 0x10, 0x00,
+  0x1c, 0x3c, 0x78, 0xff, 0xff, 0x78, 0x3c, 0x1c, 0x18, 0x30, 0x60, 0xfe,
+  0x60, 0x30, 0x18, 0x00, 0x38, 0x3c, 0x1e, 0xff, 0xff, 0x1e, 0x3c, 0x38,
+  0x30, 0x18, 0x0c, 0xfe, 0x0c, 0x18, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x3c, 0x3c, 0x3c, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x30, 0x30,
+  0x30, 0x00, 0x30, 0x00, 0x3c, 0x3c, 0x3c, 0x3c, 0x00, 0x00, 0x00, 0x00,
+  0x28, 0x28, 0x28, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x7e, 0x7e,
+  0x7e, 0x7e, 0x3c, 0x00, 0x00, 0x28, 0x7c, 0x28, 0x7c, 0x28, 0x00, 0x00,
+  0x0c, 0x3f, 0x3f, 0x3e, 0x3e, 0x7e, 0x7e, 0x18, 0x08, 0x3e, 0x28, 0x3c,
+  0x14, 0x7c, 0x10, 0x00, 0x00, 0x76, 0x7e, 0x7c, 0x3e, 0x7e, 0x6e, 0x00,
+  0x00, 0x64, 0x48, 0x10, 0x24, 0x4c, 0x00, 0x00, 0x00, 0x38, 0x7c, 0x7c,
+  0x7e, 0x7e, 0x7e, 0x3e, 0x00, 0x30, 0x48, 0x30, 0x5c, 0x48, 0x34, 0x00,
+  0x30, 0x30, 0x70, 0x60, 0x00, 0x00, 0x00, 0x00, 0x20, 0x20, 0x40, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x0e, 0x1e, 0x3c, 0x38, 0x38, 0x3c, 0x1e, 0x0e,
+  0x0c, 0x18, 0x30, 0x30, 0x30, 0x18, 0x0c, 0x00, 0x70, 0x78, 0x3c, 0x1c,
+  0x1c, 0x3c, 0x78, 0x70, 0x60, 0x30, 0x18, 0x18, 0x18, 0x30, 0x60, 0x00,
+  0x00, 0x00, 0x3e, 0x3e, 0x3e, 0x3e, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x18,
+  0x3c, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x7e, 0x7e, 0x18, 0x18, 0x00,
+  0x00, 0x10, 0x10, 0x7c, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x38, 0x38, 0x78, 0x70, 0x00, 0x00, 0x00, 0x00, 0x30, 0x30, 0x60, 0x00,
+  0x00, 0x00, 0x00, 0x3e, 0x3e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x38, 0x38, 0x38,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x30, 0x00, 0x06, 0x0e, 0x0e, 0x1c,
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+  0xff, 0xff, 0xff, 0xff, 0x3f, 0x3f, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0,
+  0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0x1f, 0x1f, 0xe0,
+  0xe0, 0xe0, 0xe0, 0xe0, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0x0f, 0x0f, 0x0f, 0x0f, 0xf0, 0xf0, 0xf0, 0xf0, 0x00, 0x00, 0x00, 0x00,
+  0xff, 0xff, 0xff, 0xff, 0x07, 0x07, 0x07, 0x07, 0x07, 0xf8, 0xf8, 0xf8,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0x03, 0x03, 0x03, 0x03,
+  0x03, 0x03, 0xfc, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
+  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0xfe, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0x80, 0x80,
+  0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x0c, 0x30, 0xc0,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x0c, 0x30, 0xc0,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0xc0, 0x30, 0x0c, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0x30, 0x0c, 0x03,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x10, 0x20, 0x20,
+  0x40, 0x40, 0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x01, 0x01, 0x02, 0x02, 0x04, 0x04, 0x08, 0x08, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0x40, 0x40, 0x20, 0x20, 0x10, 0x10,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x08, 0x04, 0x04,
+  0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x81, 0x42, 0x24, 0x18,
+  0x18, 0x24, 0x42, 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x3c, 0x42, 0x81, 0x81, 0x81, 0x81, 0x42, 0x3c, 0x0c, 0x00, 0x10, 0x00,
+  0x00, 0x00, 0x04, 0x00, 0x0c, 0x00, 0x10, 0x3e, 0x2e, 0x2e, 0x2a, 0x2e,
+  0x00, 0x3c, 0xbc, 0x5a, 0x00, 0x20, 0x24, 0x7e, 0x18, 0x00, 0x80, 0x42,
+  0x18, 0x04, 0x00, 0x12, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff,
+  0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x24, 0x00, 0x5a, 0x00,
+  0x24, 0x00, 0x18, 0x00, 0x24, 0x00, 0x5a, 0x00, 0x24, 0x00, 0x18, 0x3c,
+  0x4d, 0x41, 0x00, 0x2e, 0x24, 0x24, 0x6a, 0x6e, 0x0c, 0x00, 0x10, 0x3e,
+  0x2e, 0x2e, 0x2a, 0x2e, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0xe7, 0xc3, 0xc3, 0xe7, 0xe7, 0xdb, 0xdb, 0x93, 0x24, 0x24, 0xc3, 0x08,
+  0x18, 0xc3, 0x24, 0x24, 0x18, 0x66, 0x42, 0x91, 0x89, 0x42, 0x66, 0x18,
+  0x18, 0x24, 0x00, 0x24, 0x00, 0x18, 0x00, 0x00, 0x24, 0x00, 0x5a, 0x00,
+  0x24, 0x00, 0x18, 0x3c, 0x5a, 0x36, 0x00, 0x00, 0x6c, 0x3b, 0x76, 0x00,
+  0x24, 0x7e, 0x54, 0x45, 0x48, 0x7e, 0x3e, 0x00, 0x00, 0x08, 0x14, 0x2a,
+  0x55, 0x2a, 0x14, 0x08, 0x80, 0x49, 0x36, 0x3e, 0x5d, 0x3e, 0x36, 0x49,
+  0x0f, 0x1f, 0x3f, 0x3d, 0x38, 0x38, 0x3c, 0x16, 0x0f, 0x1f, 0x3f, 0x3f,
+  0x3f, 0x3f, 0x3f, 0x17, 0xf0, 0xf8, 0xbc, 0x14, 0xa0, 0xa0, 0x08, 0x1c,
+  0xf0, 0xf8, 0xfc, 0xfc, 0x58, 0x58, 0xf8, 0xfc, 0xf2, 0xf1, 0xe1, 0x0f,
+  0x1f, 0x3b, 0x11, 0x00, 0x0d, 0x0e, 0x0e, 0x00, 0x00, 0x04, 0x0e, 0x0f,
+  0x00, 0xe0, 0xf0, 0xf0, 0xf8, 0xdc, 0x88, 0x00, 0xc0, 0x00, 0x00, 0x00,
+  0x00, 0x20, 0x70, 0x78, 0xf2, 0xf1, 0xe1, 0x1f, 0x3f, 0x13, 0x03, 0x00,
+  0x0d, 0x0e, 0x0e, 0x00, 0x00, 0x2c, 0x3c, 0x20, 0x00, 0xe0, 0xf0, 0xf8,
+  0xe0, 0xc0, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x04, 0x1c, 0x3c, 0x1c, 0x00,
+  0xff, 0x2f, 0x7f, 0xff, 0xff, 0xf2, 0xf7, 0xff, 0x00, 0xfe, 0xfc, 0xd0,
+  0x00, 0xef, 0xcf, 0x0d, 0xff, 0xff, 0xdf, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0x00, 0x7e, 0x7c, 0x7e, 0x74, 0x7c, 0x50, 0x00, 0xff, 0xf9, 0xf9, 0xff,
+  0xff, 0x9f, 0x9f, 0xff, 0x0f, 0x6f, 0x6f, 0x0f, 0xf0, 0xf6, 0xf6, 0xf0,
+  0x05, 0x67, 0x4f, 0x1f, 0x9d, 0x3d, 0xa9, 0xff, 0xff, 0xfe, 0xff, 0xfe,
+  0xfe, 0xff, 0xfe, 0xa4, 0x00, 0x0f, 0x3f, 0x3f, 0x7f, 0x00, 0x7f, 0x7f,
+  0x0f, 0x30, 0x4d, 0x6d, 0xad, 0xff, 0x80, 0xad, 0x00, 0xf0, 0xfc, 0xfc,
+  0xfe, 0x00, 0xfe, 0xfe, 0xf0, 0x0c, 0xb2, 0xb6, 0xb7, 0xff, 0x01, 0xb7,
+  0x7f, 0x7f, 0x7f, 0x00, 0x7f, 0x7f, 0x7f, 0x00, 0xad, 0xad, 0xad, 0xff,
+  0x80, 0xad, 0xad, 0xff, 0xea, 0xe2, 0xfe, 0x00, 0xfe, 0xfe, 0xfe, 0x00,
+  0xb5, 0xbd, 0xa1, 0xff, 0x01, 0xb7, 0xb7, 0xff, 0x00, 0x22, 0x4c, 0x1f,
+  0x36, 0x3f, 0x5f, 0x17, 0x01, 0x63, 0x3f, 0x20, 0x2d, 0x29, 0x60, 0xec,
+  0x80, 0xc4, 0xf2, 0xfc, 0xdc, 0xfc, 0xfa, 0xd8, 0x00, 0x86, 0xdc, 0x04,
+  0xb0, 0x24, 0x06, 0x37, 0xff, 0x7f, 0x36, 0x3f, 0x1f, 0x5c, 0x22, 0x00,
+  0x68, 0x20, 0x0d, 0x29, 0x20, 0x77, 0x43, 0x01, 0xff, 0xfe, 0xdc, 0xfc,
+  0xfc, 0xfa, 0xc4, 0x80, 0x26, 0x04, 0xb0, 0x20, 0x04, 0xcc, 0x86, 0x00,
+  0x00, 0x00, 0x00, 0x1c, 0x26, 0x2f, 0x3f, 0x3f, 0x00, 0x00, 0x1c, 0x3e,
+  0x7f, 0x7f, 0x7f, 0x7f, 0x00, 0x00, 0x00, 0x38, 0x4c, 0xdc, 0xf4, 0xf4,
+  0x00, 0x00, 0x38, 0x74, 0xfa, 0xfa, 0xfa, 0xfa, 0x1f, 0x0f, 0x07, 0x03,
+  0x01, 0x00, 0x00, 0x00, 0x3f, 0x1f, 0x0f, 0x07, 0x02, 0x01, 0x00, 0x00,
+  0xe8, 0xd0, 0xa0, 0x40, 0x80, 0x00, 0x00, 0x00, 0xf4, 0xe8, 0xd0, 0xa0,
+  0x40, 0x80, 0x00, 0x00, 0x00, 0x03, 0x0f, 0x30, 0x73, 0x73, 0x73, 0x70,
+  0x03, 0x0f, 0x3f, 0xff, 0xfc, 0xfd, 0xfd, 0xff, 0x80, 0x20, 0xc8, 0x72,
+  0x3a, 0x3a, 0x3a, 0x7a, 0x00, 0xc0, 0xf0, 0xbc, 0xdc, 0xdc, 0xdc, 0x9c,
+  0x73, 0x73, 0x3f, 0xcf, 0x33, 0x0c, 0x03, 0x00, 0xfc, 0xfd, 0xf1, 0x3f,
+  0x0f, 0x03, 0x00, 0x00, 0xfa, 0xfa, 0xf2, 0xce, 0x38, 0xe0, 0x80, 0x00,
+  0x3c, 0xfc, 0xfc, 0xf0, 0xc0, 0x00, 0x00, 0x00, 0xb0, 0xb0, 0xbf, 0xb0,
+  0xbf, 0xbf, 0xb0, 0xb0, 0xe0, 0xe0, 0xe0, 0xff, 0xef, 0xe0, 0xe0, 0xe0,
+  0x0b, 0x0b, 0xfb, 0x0b, 0xfb, 0xfb, 0x0b, 0x0b, 0x0e, 0x0e, 0x0e, 0xfe,
+  0xf6, 0x0e, 0x0e, 0x0e, 0x00, 0x00, 0x00, 0x0c, 0x3e, 0x3e, 0x7b, 0xfb,
+  0x00, 0x00, 0x00, 0x38, 0x7c, 0x7c, 0xfe, 0xfe, 0x7b, 0xf3, 0xf3, 0x66,
+  0x7e, 0x3c, 0x00, 0x00, 0xfe, 0xfe, 0x7c, 0x7c, 0x38, 0x00, 0x00, 0x00,
+  0x00, 0x17, 0x0f, 0x1f, 0x12, 0x30, 0x08, 0x18, 0x00, 0x00, 0x00, 0x00,
+  0x0d, 0x0f, 0x07, 0x07, 0x00, 0xc8, 0xf8, 0xf0, 0x40, 0x40, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0xa0, 0xb0, 0xe0, 0xc0, 0x0f, 0x1f, 0x1f, 0x13,
+  0x03, 0x0e, 0x0e, 0x0f, 0x0f, 0x1f, 0x1f, 0x1c, 0x0c, 0x00, 0x0e, 0x0f,
+  0xc0, 0xe0, 0xe0, 0xc0, 0xc0, 0xc0, 0xe0, 0x70, 0xc0, 0xe0, 0xe0, 0x20,
+  0x20, 0x00, 0xe0, 0x70, 0x00, 0x17, 0x0f, 0x1f, 0x12, 0x30, 0x08, 0x18,
+  0x00, 0x00, 0x00, 0x00, 0x0d, 0x0f, 0x07, 0x07, 0x00, 0xc8, 0xf8, 0xf0,
+  0x40, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa0, 0xb0, 0xe0, 0xc0,
+  0x1f, 0x1f, 0x0f, 0x0f, 0x3f, 0x7c, 0x30, 0x18, 0x1f, 0x3f, 0x3f, 0x00,
+  0x00, 0x60, 0x30, 0x18, 0xc0, 0xf0, 0xf8, 0xe4, 0xfc, 0xfc, 0x7c, 0x00,
+  0xcc, 0xfc, 0xf8, 0x04, 0x0c, 0x0c, 0x0c, 0x00, 0x00, 0x17, 0x0f, 0x1f,
+  0x12, 0x30, 0x08, 0x18, 0x00, 0x00, 0x00, 0x00, 0x0d, 0x0f, 0x07, 0x07,
+  0x00, 0xc8, 0xf8, 0xf0, 0x40, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0xa0, 0xb0, 0xe0, 0xc0, 0x0f, 0x1f, 0x1f, 0x13, 0x03, 0x0e, 0x0e, 0x0f,
+  0x0f, 0x1f, 0x1f, 0x1c, 0x0c, 0x00, 0x0e, 0x0f, 0xc0, 0xc0, 0xc0, 0xc0,
+  0xc0, 0xc0, 0xe0, 0x00, 0xc0, 0xc0, 0xe0, 0x20, 0x00, 0xc0, 0xe0, 0x00,
+  0x00, 0x00, 0x17, 0x0f, 0x1f, 0x12, 0x30, 0x08, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x0d, 0x0f, 0x07, 0x00, 0x00, 0xc8, 0xf8, 0xf0, 0x40, 0x40, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0xa0, 0xb0, 0xe0, 0x18, 0x1f, 0x0f, 0x0f,
+  0x3f, 0x7b, 0x43, 0x03, 0x07, 0x1f, 0x3f, 0x37, 0x20, 0x60, 0x43, 0x03,
+  0x00, 0xe0, 0xe0, 0xc0, 0xc0, 0x80, 0x80, 0xc0, 0xc0, 0xf8, 0xf8, 0xc0,
+  0x00, 0x00, 0x80, 0xc0, 0x00, 0x17, 0x0f, 0x1f, 0x12, 0x30, 0x08, 0x18,
+  0x00, 0x00, 0x00, 0x00, 0x0d, 0x0f, 0x07, 0x1f, 0x00, 0xc8, 0xf8, 0xf0,
+  0x40, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa0, 0xb0, 0xe0, 0xcc,
+  0x3f, 0x3f, 0x0f, 0x7f, 0x7f, 0x7e, 0x40, 0x00, 0x3f, 0x7f, 0x6f, 0x60,
+  0x60, 0x60, 0x40, 0x00, 0xd0, 0xf8, 0xf0, 0xc4, 0xfc, 0xfc, 0x7c, 0x00,
+  0xdc, 0xf8, 0xf0, 0x04, 0x0c, 0x0c, 0x0c, 0x00, 0x00, 0x17, 0x0f, 0x1f,
+  0x1f, 0x3f, 0x0f, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x60,
+  0x00, 0xe0, 0xf0, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0x00, 0x18, 0x08, 0x04,
+  0x04, 0x00, 0x0c, 0x04, 0x7f, 0x3f, 0x1f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f,
+  0x7f, 0x3f, 0x1f, 0x00, 0x00, 0x06, 0x0f, 0x0f, 0xf8, 0xf8, 0xf8, 0xf8,
+  0xf0, 0x00, 0x00, 0x00, 0xf8, 0xf8, 0xc0, 0x00, 0x70, 0x00, 0x00, 0x00,
+  0x00, 0x17, 0x0f, 0x1f, 0x1a, 0x19, 0x0a, 0x7c, 0x00, 0x00, 0x00, 0x00,
+  0x05, 0x66, 0x65, 0x63, 0x00, 0xe8, 0xf0, 0xf8, 0x58, 0x9c, 0x50, 0x38,
+  0x00, 0x00, 0x00, 0x00, 0xa0, 0x60, 0xa0, 0xc3, 0x7f, 0x3f, 0x4f, 0x7f,
+  0x7f, 0x7e, 0x00, 0x00, 0x7f, 0x3f, 0x4f, 0x60, 0x60, 0x60, 0x00, 0x00,
+  0xfc, 0xfe, 0xf0, 0xe0, 0xf0, 0xf0, 0xe0, 0x70, 0xff, 0xfe, 0xf0, 0x00,
+  0x00, 0x00, 0xe0, 0x70, 0xff, 0x80, 0x80, 0x9f, 0x90, 0x97, 0x97, 0x97,
+  0x00, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0xfe, 0x02, 0x06, 0xfe,
+  0x0e, 0xfe, 0xfe, 0xfe, 0x00, 0xfe, 0xfc, 0xf8, 0xf8, 0xe8, 0xe8, 0xe8,
+  0x97, 0x97, 0x97, 0x97, 0x9f, 0xbf, 0xff, 0x00, 0x7f, 0x7f, 0x7f, 0x78,
+  0x7f, 0x60, 0x40, 0x00, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0x00,
+  0xe8, 0xe8, 0xe8, 0x08, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x7f, 0x60,
+  0x6e, 0x72, 0x76, 0x76, 0x00, 0x00, 0x1f, 0x3f, 0x31, 0x2d, 0x29, 0x29,
+  0x00, 0xfc, 0xfe, 0x0e, 0x7e, 0x4e, 0x6e, 0x6e, 0x00, 0x00, 0xf8, 0xfc,
+  0x8c, 0xb4, 0x94, 0x94, 0x7e, 0x60, 0x60, 0x7f, 0x7c, 0x7e, 0x3f, 0x00,
+  0x21, 0x3f, 0x3f, 0x38, 0x1b, 0x01, 0x00, 0x00, 0x7e, 0x0e, 0x0e, 0xfe,
+  0x3e, 0x7e, 0xfc, 0x00, 0x84, 0xfc, 0xfc, 0x1c, 0xd8, 0x80, 0x00, 0x00,
+  0x00, 0x7f, 0x7f, 0x60, 0x7f, 0x7f, 0x77, 0x76, 0x00, 0x00, 0x3f, 0x3f,
+  0x00, 0x20, 0x29, 0x29, 0x00, 0xfe, 0xfe, 0x0e, 0xfe, 0xfe, 0xee, 0x6e,
+  0x00, 0x00, 0xfc, 0xfc, 0x00, 0x04, 0x94, 0x94, 0x72, 0x6e, 0x60, 0x77,
+  0x7e, 0x3c, 0x1f, 0x00, 0x2d, 0x31, 0x3f, 0x3c, 0x19, 0x03, 0x00, 0x00,
+  0x4e, 0x7e, 0x0e, 0xee, 0x7e, 0x3c, 0xf8, 0x00, 0xb4, 0x8c, 0xfc, 0x3c,
+  0x98, 0xc0, 0x00, 0x00
+};
diff --git a/presets/nes/jroatch.chr b/presets/nes/jroatch.chr
new file mode 100644
index 00000000..d561a3a6
Binary files /dev/null and b/presets/nes/jroatch.chr differ
diff --git a/presets/nes/music.c b/presets/nes/music.c
index 8db42cad..97462942 100644
--- a/presets/nes/music.c
+++ b/presets/nes/music.c
@@ -1,4 +1,3 @@
-
 
 #include <string.h>
 #include <nes.h>
@@ -7,8 +6,6 @@
 
 typedef unsigned char byte;
 
-#pragma data-name (push,"CHARS")
-
 const unsigned char TILESET[8*128] = {/*{w:8,h:8,bpp:1,count:128,brev:1}*/
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x7c,0x7c,0x7c,0x38,0x00,0x38,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x6c,0x6c,0x48,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x6c,0xfe,0x6c,0xfe,0x6c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x10,0xfe,0xd0,0xfe,0x16,0xfe,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xce,0xdc,0x38,0x76,0xe6,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x6c,0x7c,0xec,0xee,0x7e,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x38,0x30,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x70,0x70,0x70,0x70,0x70,0x38,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x70,0x38,0x38,0x38,0x38,0x38,0x30,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x6c,0x38,0x6c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x38,0xfe,0x38,0x38,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x60,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x60,0x60,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0e,0x1e,0x3c,0x78,0xf0,0xe0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x7c,0xee,0xee,0xee,0xee,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x78,0x38,0x38,0x38,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0x0e,0x7c,0xe0,0xee,0xfe,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xfc,0x0e,0x3c,0x0e,0x0e,0xfc,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3e,0x7e,0xee,0xee,0xfe,0x0e,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xfc,0xe0,0xfc,0x0e,0xee,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0xe0,0xfc,0xee,0xee,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xfe,0xee,0x1c,0x1c,0x38,0x38,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0xee,0x7c,0xee,0xee,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0xee,0xee,0x7e,0x0e,0x3c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x60,0x60,0x00,0x00,0x60,0x60,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x60,0x60,0x00,0x00,0x60,0x60,0xc0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x1c,0x38,0x70,0x70,0x38,0x1c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0x00,0x00,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x70,0x38,0x1c,0x1c,0x38,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0xee,0x1c,0x38,0x00,0x38,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
@@ -16,8 +13,6 @@ const unsigned char TILESET[8*128] = {/*{w:8,h:8,bpp:1,count:128,brev:1}*/
 0x00,0xfc,0xee,0xee,0xee,0xfc,0xe0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0xee,0xee,0xee,0xec,0x7e,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xfc,0xee,0xee,0xee,0xfc,0xee,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0xe0,0x7c,0x0e,0xee,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xfe,0x38,0x38,0x38,0x38,0x38,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xee,0xee,0xee,0xee,0xee,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xee,0xee,0xee,0x6c,0x38,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xee,0xee,0xfe,0xfe,0xee,0xc6,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xee,0x7c,0x38,0x7c,0xee,0xee,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xee,0xee,0xee,0x7c,0x38,0x38,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xfe,0x1c,0x38,0x70,0xe0,0xfe,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 };
 
-#pragma data-name(pop)
-
 //
 // MUSIC ROUTINES
 //
diff --git a/presets/nes/neslib.h b/presets/nes/neslib.h
index e6762296..188548f9 100644
--- a/presets/nes/neslib.h
+++ b/presets/nes/neslib.h
@@ -293,3 +293,8 @@ void __fastcall__ nmi_set_callback(void (*callback)(void));
 
 #define MSB(x)			(((x)>>8))
 #define LSB(x)			(((x)&0xff))
+
+// ensure CHARS segment is defined
+
+#pragma data-name(push,"CHARS")
+#pragma data-name(pop)
diff --git a/presets/nes/neslib1.c b/presets/nes/neslib1.c
index a5d42c6c..c83ae60e 100644
--- a/presets/nes/neslib1.c
+++ b/presets/nes/neslib1.c
@@ -3,16 +3,9 @@
 
 #include "neslib.h"
 
-#pragma data-name (push,"CHARS")
-
-const unsigned char TILESET[8*128] = {/*{w:8,h:8,bpp:1,count:64,brev:1,np:2,pofs:8,remap:[0,1,2,4,5,6,7,8,9,10,11,12]}*/
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x7c,0x7c,0x7c,0x38,0x00,0x38,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x6c,0x6c,0x48,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x6c,0xfe,0x6c,0xfe,0x6c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x10,0xfe,0xd0,0xfe,0x16,0xfe,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xce,0xdc,0x38,0x76,0xe6,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x6c,0x7c,0xec,0xee,0x7e,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x38,0x30,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x70,0x70,0x70,0x70,0x70,0x38,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x70,0x38,0x38,0x38,0x38,0x38,0x30,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x6c,0x38,0x6c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x38,0xfe,0x38,0x38,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x60,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x60,0x60,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0e,0x1e,0x3c,0x78,0xf0,0xe0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
-0x00,0x7c,0xee,0xee,0xee,0xee,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x78,0x38,0x38,0x38,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0x0e,0x7c,0xe0,0xee,0xfe,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xfc,0x0e,0x3c,0x0e,0x0e,0xfc,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3e,0x7e,0xee,0xee,0xfe,0x0e,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xfc,0xe0,0xfc,0x0e,0xee,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0xe0,0xfc,0xee,0xee,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xfe,0xee,0x1c,0x1c,0x38,0x38,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0xee,0x7c,0xee,0xee,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0xee,0xee,0x7e,0x0e,0x3c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x60,0x60,0x00,0x00,0x60,0x60,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x60,0x60,0x00,0x00,0x60,0x60,0xc0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x1c,0x38,0x70,0x70,0x38,0x1c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0x00,0x00,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x70,0x38,0x1c,0x1c,0x38,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0xee,0x1c,0x38,0x00,0x38,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
-0x00,0x7c,0xee,0xee,0xee,0xe0,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0xee,0xee,0xee,0xfe,0xee,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xfc,0xee,0xfc,0xee,0xee,0xfc,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0xee,0xe0,0xe0,0xee,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xf8,0xec,0xee,0xee,0xee,0xfc,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xfe,0xe0,0xf0,0xe0,0xe0,0xfe,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xfe,0xe0,0xf8,0xe0,0xe0,0xe0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0xe0,0xee,0xee,0xee,0x7e,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xee,0xee,0xfe,0xee,0xee,0xee,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0x38,0x38,0x38,0x38,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0e,0x0e,0x0e,0x0e,0xee,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xee,0xfc,0xf8,0xec,0xee,0xee,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xe0,0xe0,0xe0,0xe0,0xee,0xfe,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xc6,0xee,0xfe,0xfe,0xee,0xee,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xce,0xee,0xfe,0xfe,0xee,0xe6,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0xee,0xee,0xee,0xee,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
-0x00,0xfc,0xee,0xee,0xee,0xfc,0xe0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0xee,0xee,0xee,0xec,0x7e,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xfc,0xee,0xee,0xee,0xfc,0xee,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0xe0,0x7c,0x0e,0xee,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xfe,0x38,0x38,0x38,0x38,0x38,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xee,0xee,0xee,0xee,0xee,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xee,0xee,0xee,0x6c,0x38,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xee,0xee,0xfe,0xfe,0xee,0xc6,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xee,0x7c,0x38,0x7c,0xee,0xee,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xee,0xee,0xee,0x7c,0x38,0x38,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xfe,0x1c,0x38,0x70,0xe0,0xfe,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
-};
-
-#pragma data-name(pop)
+//#link "jroatch.c"
+extern unsigned char jroatch_chr[0x1000];
+#define TILESET jroatch_chr
 
 //this macro is used remove need of calculation of the nametable address in runtime
 
@@ -27,7 +20,7 @@ void put_str(unsigned int adr,const char *str)
         while(1)
         {
                 if(!*str) break;
-                vram_put((*str++)-0x20);//-0x20 because ASCII code 0x20 is placed in tile 0 of the CHR
+                vram_put((*str++));
         }
 }
 
@@ -38,7 +31,9 @@ void main(void)
 	vram_write((unsigned char*)TILESET, sizeof(TILESET));
   
   	//rendering is disabled at the startup, and palette is all black
-        pal_col(1,0x30);//set while color
+        pal_col(1,0x04);
+        pal_col(2,0x20);
+        pal_col(3,0x30);
 
         //you can't put data into vram through vram_put while rendering is enabled
         //so you have to disable rendering to put things like text or a level map
@@ -51,9 +46,6 @@ void main(void)
         put_str(NTADR(2,4),"THIS CODE PRINTS SOME TEXT");
         put_str(NTADR(2,5),"USING ASCII-ENCODED CHARACTER");
         put_str(NTADR(2,6),"SET WITH CAPITAL LETTERS ONLY");
-        put_str(NTADR(2,8),"TO USE CHR MORE EFFICIENTLY");
-        put_str(NTADR(2,9),"YOU'D NEED A CUSTOM ENCODING");
-        put_str(NTADR(2,10),"AND A CONVERSION TABLE");
 
         ppu_on_all();//enable rendering
 
diff --git a/presets/nes/neslib2.c b/presets/nes/neslib2.c
index 560a6495..f3beda90 100644
--- a/presets/nes/neslib2.c
+++ b/presets/nes/neslib2.c
@@ -4,9 +4,6 @@
 
 #include "neslib.h"
 
-#pragma data-name (push,"CHARS")
-#pragma data-name(pop)
-
 //#link "tileset1.c"
 
 // palette for balls, there are four sets for different ball colors
diff --git a/presets/nes/neslib3.c b/presets/nes/neslib3.c
index 8687e43a..d621a5e3 100644
--- a/presets/nes/neslib3.c
+++ b/presets/nes/neslib3.c
@@ -6,9 +6,6 @@
 
 #include "neslib.h"
 
-#pragma data-name (push,"CHARS")
-#pragma data-name(pop)
-
 //#link "tileset1.c"
 
 // tile set, two planes for 4 colors
diff --git a/presets/nes/neslib4.c b/presets/nes/neslib4.c
index 91c0690c..fc8e83fc 100644
--- a/presets/nes/neslib4.c
+++ b/presets/nes/neslib4.c
@@ -1,9 +1,6 @@
 
 #include "neslib.h"
 
-#pragma data-name (push,"CHARS")
-#pragma data-name(pop)
-
 //#link "tileset1.c"
 
 // tile set, two planes for 4 colors
diff --git a/presets/nes/neslib5.c b/presets/nes/neslib5.c
index 82523846..f6d428f6 100644
--- a/presets/nes/neslib5.c
+++ b/presets/nes/neslib5.c
@@ -4,9 +4,6 @@
 
 #include "neslib.h"
 
-#pragma data-name (push,"CHARS")
-#pragma data-name(pop)
-
 const unsigned char test[308]={
 0x01,0x00,0x01,0xa3,0x10,0x01,0x04,0x00,0x10,0x01,0x04,0x00,0x10,0x01,0x04,0x00,
 0x10,0x01,0x04,0x00,0x01,0x0a,0x10,0x00,0x01,0x02,0x10,0x00,0x01,0x04,0x10,0x00,
diff --git a/presets/nes/shoot2.c b/presets/nes/shoot2.c
index 80eef825..8d8fea79 100644
--- a/presets/nes/shoot2.c
+++ b/presets/nes/shoot2.c
@@ -5,9 +5,6 @@
 
 #include "neslib.h"
 
-#pragma data-name (push,"CHARS")
-#pragma data-name(pop)
-
 #define COLS 32
 #define ROWS 28
 
diff --git a/presets/nes/siegegame.c b/presets/nes/siegegame.c
index 78ad13bc..8ebefc70 100644
--- a/presets/nes/siegegame.c
+++ b/presets/nes/siegegame.c
@@ -6,9 +6,6 @@
 
 #include "neslib.h"
 
-#pragma data-name (push,"CHARS")
-#pragma data-name(pop)
-
 //#link "tileset1.c"
 
 extern unsigned char palSprites[16];
diff --git a/presets/nes/transtable.c b/presets/nes/transtable.c
index 16bda3b3..ceb7e779 100644
--- a/presets/nes/transtable.c
+++ b/presets/nes/transtable.c
@@ -5,9 +5,6 @@
 
 #include <string.h>
 
-#pragma data-name (push,"CHARS")
-#pragma data-name(pop)
-
 const unsigned char TILESET[48*16] = {/*{w:8,h:8,bpp:1,count:48,brev:1,np:2,pofs:8,remap:[0,1,2,4,5,6,7,8,9,10,11,12]}*/
   0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
   0x7e,0x42,0x42,0x46,0x46,0x46,0x7e,0x00,0x7e,0x42,0x42,0x46,0x46,0x46,0x7e,0x00,
diff --git a/src/platform/nes.ts b/src/platform/nes.ts
index ee14cd77..936441be 100644
--- a/src/platform/nes.ts
+++ b/src/platform/nes.ts
@@ -10,8 +10,9 @@ declare var jsnes : any;
 
 const JSNES_PRESETS = [
   {id:'ex0.asm', name:'Initialization (ASM)'},
-  {id:'ex1.asm', name:'Scrolling Demo (ASM)'},
-  {id:'ex2.asm', name:'Sprite Demo (ASM)'},
+  {id:'ex1.asm', name:'Hello World (ASM)'},
+  {id:'ex2.asm', name:'Scrolling Demo (ASM)'},
+  {id:'ex3.asm', name:'Sprite Demo (ASM)'},
   {id:'neslib1.c', name:'Text'},
   {id:'neslib2.c', name:'Sprites'},
   {id:'neslib3.c', name:'Cursor'},
diff --git a/src/project.ts b/src/project.ts
index 23ba0f8c..eff1a5da 100644
--- a/src/project.ts
+++ b/src/project.ts
@@ -1,7 +1,7 @@
 "use strict";
 
 import { FileData, Dependency, SourceLine, SourceFile, CodeListing, CodeListingMap, WorkerError, WorkerResult } from "./workertypes";
-import { getFilenameForPath, getFilenamePrefix, getFolderForPath } from "./util";
+import { getFilenameForPath, getFilenamePrefix, getFolderForPath, isProbablyBinary } from "./util";
 
 type BuildResultCallback = (result:WorkerResult) => void;
 type BuildStatusCallback = (busy:boolean) => void;
@@ -206,12 +206,13 @@ export class CodeProject {
               var webpath = "presets/" + preset_id + "/" + path;
               if (this.platform_id.startsWith('vcs') && path.indexOf('.') <= 0)
                 webpath += ".a"; // legacy stuff
-              this.callbackGetRemote( webpath, (text:string) => {
+              // try to GET file, use file ext to determine text/binary
+              this.callbackGetRemote( webpath, (text:FileData) => {
                 console.log("GET",webpath,text.length,'bytes');
                 this.filedata[path] = text; // do not update store, just cache
                 addResult(path, text);
                 loadNext();
-              }, 'text')
+              }, isProbablyBinary(path) ? 'arraybuffer' : 'text')
               .fail( (err:XMLHttpRequest) => {
                 console.log("Could not load preset", path, err.status);
                 // only cache result if status is 404 (not found)
diff --git a/src/ui.ts b/src/ui.ts
index 01d6305a..097eae03 100644
--- a/src/ui.ts
+++ b/src/ui.ts
@@ -296,7 +296,7 @@ function handleFileUpload(files: File[]) {
         var arrbuf = (<any>e.target).result as ArrayBuffer;
         var data : FileData = new Uint8Array(arrbuf);
         // convert to UTF8, unless it's a binary file
-        if (isProbablyBinary(data)) { // path.endsWith("bin")) {
+        if (isProbablyBinary(path, data)) {
           gotoMainFile = false;
         } else {
           data = byteArrayToUTF8(data);
diff --git a/src/util.ts b/src/util.ts
index 614629f1..cc7dd1b7 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -315,10 +315,16 @@ export function removeBOM(s:string) {
   return s;
 }
 
-export function isProbablyBinary(data : number[] | Uint8Array) : boolean {
+export function isProbablyBinary(path:string, data?:number[] | Uint8Array) : boolean {
   var score = 0;
+  // check extensions
+  if (path) {
+    path = path.toUpperCase();
+    if (path.endsWith('.CHR') || path.endsWith('.BIN'))
+      score++;
+  }
   // decode as UTF-8
-  for (var i = 0; i < data.length;) {
+  for (var i = 0; i < (data?data.length:0);) {
     let c = data[i++];
     if ((c & 0x80) == 0) {
       // more likely binary if we see a NUL or obscure control character