diff --git a/snes/tests/Makefile b/snes/tests/Makefile
new file mode 100644
index 0000000..22aac2e
--- /dev/null
+++ b/snes/tests/Makefile
@@ -0,0 +1,17 @@
+OBJS = header.ips reset.o65 tests.o65
+
+all: test.bin
+
+test.bin: $(OBJS)
+	sneslink -fsmc -o $@ $^
+
+# Generic rule to create .o65 out from .a65
+%.o65: %.a65
+	snescom -J -Wall -o $@ $<
+
+# Generic rule to create .ips out from .a65
+%.ips: %.a65
+	snescom -I -J -Wall -o $@ $<
+
+clean:
+	rm -f *.ips *.o65 *~ test.bin
diff --git a/snes/tests/header.a65 b/snes/tests/header.a65
new file mode 100644
index 0000000..b182b25
--- /dev/null
+++ b/snes/tests/header.a65
@@ -0,0 +1,121 @@
+; This file is part of the snescom-asm demo - a demo of how to build a SNES program.
+; See http://bisqwit.iki.fi/source/snescom.html for details.
+
+; Begin assembling to this address.
+*= $C0F000
+LINETEST:
+	sei
+	clc
+	xce
+-	lda $0000
+	lda $2100
+	sta $2100
+	bra -
+
+*= $C0F100
+IRQTEST:
+	sei
+	clc
+	xce
+	cli
+	sep #$20 : .as
+	rep #$10 : .xl
+	lda #$0f
+	sta $2100
+	lda #$ff
+	sta $4209
+	lda #$ff
+	sta $420a
+	lda #$ff
+	sta $4200
+	lda #$01
+-	sta @$002222
+	bra -
+
+*= $C0F200
+BANKTEST:
+	sei
+	clc
+	xce
+	sep #$20 : .as
+	lda #$01
+	sta @$0055aa
+-	bra -
+
+*= $C0FF00
+
+RESET:
+        sei
+        clc
+        xce
+        rep #$20 : .al
+        lda #$1fff
+        tcs
+	lda #$00
+	sta @$003333
+        jmp @GAME_MAIN
+
+NMI_16bit:
+        php
+         rep #$30 : .al : .xl
+         pha: phx: phy: phd: phb
+         jsl @NMI_ROUTINE
+         rep #$30 : .al : .xl
+int_exit:
+         plb: pld: ply: plx: pla
+        plp
+        rti
+
+IRQ_16bit:
+ABT_8bit: ABT_16bit:
+        php
+         rep #$30 : .al : .xl
+         pha: phx: phy: phd: phb
+         jsl @IRQ_ROUTINE
+	 rep #$30 : .al : .xl
+         bra int_exit
+
+;error vectors
+BRK_8bit: BRK_16bit:
+COP_8bit: COP_16bit:
+IRQ_8bit:
+NMI_8bit:
+        - wai: lda $ABCDEF : bra -
+
+*= $C0FFB0
+        ; Zero the area from $FFB0 - $FFFF
+        ; to ensure that the linker won't get clever
+        ; and fill it with small pieces of code.
+        .word 0,0,0,0, 0,0,0,0
+        .word 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0
+        .word 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0
+
+*= $C0FFB0
+
+.byt "MR"         ;2 bytes - company id
+.byt "TEST"       ;4 bytes - rom id
+
+*= $C0FFC0
+.byt "SD2SNES TESTS        "
+     ;123456789012345678901; - max 21 chars
+
+*= $C0FFD5     .byt $31  ;rom speed
+*= $C0FFD6     .byt $02  ;rom type
+*= $C0FFD7     .byt $06  ;rom size   64 kByte
+*= $C0FFD8     .byt $03  ;sram size  8 kBit
+*= $C0FFD9     .byt $09  ;rom region 4 = Finland
+*= $C0FFDA     .byt $33  ;company id flag
+
+*= $C0FFDC     .word 0,0 ;checksums
+
+*= $C0FFE4     .word COP_16bit
+*= $C0FFE6     .word BRK_16bit
+*= $C0FFE8     .word ABT_16bit
+*= $C0FFEA     .word NMI_16bit
+*= $C0FFEE     .word IRQ_16bit
+*= $C0FFF4     .word COP_8bit
+*= $C0FFF8     .word ABT_8bit
+*= $C0FFFA     .word NMI_8bit
+*= $C0FFFC     .word RESET
+*= $C0FFFE     .word BRK_8bit
+*= $C0FFFE     .word IRQ_8bit
diff --git a/snes/tests/reset.a65 b/snes/tests/reset.a65
new file mode 100644
index 0000000..d97fd06
--- /dev/null
+++ b/snes/tests/reset.a65
@@ -0,0 +1,29 @@
+; This file is part of the snescom-asm demo - a demo of how to build a SNES program.
+; See http://bisqwit.iki.fi/source/snescom.html for details.
+
+; NMI - called on VBlank
+NMI_ROUTINE:
+        sep #$20 : .as
+	rep #$10 : .xl
+	lda #$00
+	pha
+	plb
+
+	lda $4210	; ack interrupt
+
+        rtl
+
+; IRQ - called when triggered
+IRQ_ROUTINE:
+        sep #$20 : .as
+        lda $4211  ;Acknowledge irq
+	lda #$00
+	sta @$002121
+	lda #$ff
+	sta @$002122
+	lda #$01
+	sta @$002122
+	lda #$5A
+	sta @$F00000
+	rtl
+
diff --git a/snes/tests/tests.a65 b/snes/tests/tests.a65
new file mode 100644
index 0000000..75b5686
--- /dev/null
+++ b/snes/tests/tests.a65
@@ -0,0 +1,564 @@
+GAME_MAIN:
+	sep #$20 : .as
+	stz $4200 ; inhibit VBlank NMI
+	lda #$01
+	sta $420d ; fast cpu
+	jsr killdma
+	jsr waitblank
+	lda #$00
+	sta @$f00000
+	sta @$f00001
+	sta @$f00002
+	sta @$f00003
+	lda #$00
+	sta @$f01fff
+	jsr snes_init
+	jsr video_init
+	jsr linetest
+	jsr batest
+	jsr snes_init
+	jsr video_init
+	jsr copy_memtest
+	jsr irqtest
+	jsl $7e1800
+-	bra -
+
+copy_memtest:
+	rep #$30 : .al : .xl
+	lda #$0300
+	ldx #!memtest
+	ldy #$1800
+	mvn $7e, ^memtest
+	rts
+
+linetest
+	sep #$20 : .as
+	lda #$00
+	pha
+	plb
+-	lda $0000
+        lda $2100
+        sta $21ff
+	lda @$f01fff
+	cmp #$01
+	bne -
+	rts
+
+irqtest:
+	cli
+	sep #$20 : .as
+	rep #$10 : .xl
+	lda #$0f
+	sta $2100
+	lda #$ff
+	sta $4209
+	lda #$ff
+	sta $420a
+	lda #$ff
+	sta $4200
+	sta @$f00000
+	lda #$01
+	sta @$002222
+	rts
+
+batest:
+	sei
+	sep #$20 : .as
+	rep #$10 : .xl
+	lda #$00
+	ldx #$2100
+-	sta !$0, x
+	inx
+	inc
+	bne -
+	lda #$e0
+	pha
+	plb
+	lda #$00
+	ldx #$0000
+-	cmp !$0, x
+	bne batest_fail
+	inx
+	inc
+	bne -
+	lda #$5a
+	sta @$f00002
+	lda #$00
+	pha
+	plb
+	rts
+batest_fail:
+	lda #$ff
+	sta @$f00002
+	lda #$00
+	pha
+	plb
+	rts
+
+memtest:
+; test 4 areas: 00-3f:8000-ffff
+;               40-7d:0000-ffff
+;               80-bf:8000-ffff
+;               80-ff:0000-ffff
+	sep #$20 : .as
+	rep #$10 : .xl
+
+	lda #$01
+	sta @$003333 ; switch to linear memory mode
+	ldx #$8000
+	stx $00
+	ldx #$8000
+	stx $10
+	lda #$00
+	sta $03 ; bank no.
+mem0_writeloop0:
+; switch bank
+	pha
+	plb
+	lda #$01
+	sta @$003333
+-       lda $03
+	clc
+	adc $01
+	clc
+	adc $00
+	sta !$0000, x
+	inx
+	stx $00
+	bne -
+	ldx $10
+	inc $03
+	lda #$00
+	sta @$003333
+	lda $03
+	sta @$f00003
+	cmp #$40
+	bne mem0_writeloop0
+
+	ldx #$0000
+	stx $10
+mem0_writeloop1:
+; switch bank
+        lda #$01
+        sta @$003333
+	lda $03
+	pha
+	plb
+-	lda $03
+	clc
+	adc $01
+	clc
+	adc $00
+	sta !$0000, x
+	inx
+	stx $00
+	bne -
+	ldx $10
+	inc $03
+	lda #$00
+	sta @$003333
+	lda $03
+	sta @$f00003
+	cmp #$7e
+	bne mem0_writeloop1
+
+	ldx #$8000
+	stx $10
+	lda #$80
+	sta $03 ; bank no.
+mem0_writeloop2:
+; switch bank
+        lda #$01
+        sta @$003333
+	lda $03
+	pha
+	plb
+-	lda $03
+	clc
+	adc $01
+	clc
+	adc $00
+	sta !$0000, x
+	inx
+	stx $00
+	bne -
+	ldx $10
+	inc $03
+	lda #$00
+	sta @$003333
+	lda $03
+	sta @$f00003
+	cmp #$c0
+	bne mem0_writeloop2
+	ldx #$0000
+	stx $10
+mem0_writeloop3:
+; switch bank
+        lda #$01
+        sta @$003333
+	lda $03
+	pha
+	plb
+-	lda $03
+	clc
+	adc $01
+	clc
+	adc $00
+	sta !$0000, x
+	inx
+	stx $00
+	bne -
+	ldx $10
+	inc $03
+	lda #$00
+	sta @$003333
+	lda $03
+	sta @$f00003
+	bne mem0_writeloop3
+
+	lda #$00
+	sta @$002121
+	lda #$ff
+	sta @$002122
+	lda #$03
+	sta @$002122
+
+	ldx #$8000
+	stx $00
+	ldx #$8000
+	stx $10
+	lda #$00
+	sta $03 ; bank no.
+mem0_verifyloop0:
+; switch bank
+        lda #$01
+        sta @$f00001
+        lda #$01
+        sta @$003333
+	lda $03
+	pha
+	plb
+-	lda $03
+	clc
+	adc $01
+	clc
+	adc $00
+	cmp !$0000, x
+	bne mem0_fail
+	inx
+	stx $00
+	bne -
+	ldx $10
+	inc $03
+	lda #$00
+	sta @$003333
+	lda $03
+	sta @$f00003
+	cmp #$40
+	bne mem0_verifyloop0
+
+	ldx #$0000
+	stx $10
+mem0_verifyloop1:
+; switch bank
+        lda #$01
+        sta @$003333
+	lda $03
+	pha
+	plb
+-	lda $03
+	clc
+	adc $01
+	clc
+	adc $00
+	cmp !$0000, x
+	bne mem0_fail
+	inx
+	stx $00
+	bne -
+	ldx $10
+	inc $03
+	lda #$00
+	sta @$003333
+	lda $03
+	sta @$f00003
+	cmp #$7e
+	bne mem0_verifyloop1
+
+	ldx #$8000
+	stx $10
+	lda #$80
+	sta $03 ; bank no.
+        bra mem0_verifyloop2
+mem0_fail:
+	lda #$00
+	pha
+	plb
+	sta @$003333
+	rep #$20 : .al
+	lda $00
+	sta @$f00004
+	sep #$20 : .as
+	lda $03
+	sta @$f00006
+	lda #$ff
+	sta @$f00001
+	rtl
+mem0_verifyloop2:
+; switch bank
+        lda #$01
+        sta @$003333
+	lda $03
+	pha
+	plb
+-	lda $03
+	clc
+	adc $01
+	clc
+	adc $00
+	cmp !$0000, x
+	bne mem0_fail
+	inx
+	stx $00
+	bne -
+	ldx $10
+	inc $03
+	lda #$00
+	sta @$003333
+	lda $03
+	sta @$f00003
+	cmp #$c0
+	bne mem0_verifyloop2
+
+	ldx #$0000
+	stx $10
+mem0_verifyloop3:
+; switch bank
+        lda #$01
+        sta @$003333
+	lda $03
+	pha
+	plb
+-	lda $03
+	clc
+	adc $01
+	clc
+	adc $00
+	cmp !$0000, x
+	bne mem0_fail
+	inx
+	stx $00
+	bne -
+	ldx $10
+	inc $03
+	lda #$00
+	sta @$003333
+	lda $03
+	sta @$f00003
+	bne mem0_verifyloop3
+
+	lda #$00
+	sta @$002121
+	lda #$e0
+	sta @$002122
+	lda #$03
+	sta @$002122
+
+	lda #$00
+	pha
+	plb
+	sta @$003333
+	lda #$5a
+	sta @$f00001
+	rtl
+	rtl
+	rtl
+	rtl
+	rtl
+	rtl
+
+killdma:
+	stz $420b
+	stz $420c
+	stz $4310
+	stz $4311
+	stz $4312
+	stz $4313
+	stz $4314
+	stz $4320
+	stz $4321
+	stz $4322
+	stz $4323
+	stz $4324
+	stz $4330
+	stz $4331
+	stz $4332
+	stz $4333
+	stz $4334
+	stz $4340
+	stz $4341
+	stz $4342
+	stz $4343
+	stz $4344
+	stz $4350
+	stz $4351
+	stz $4352
+	stz $4353
+	stz $4354
+	stz $4360
+	stz $4361
+	stz $4362
+	stz $4363
+	stz $4364
+	rts
+
+
+
+
+waitblank:
+-	lda $4212
+	and #$80
+	bne -
+-	lda $4212
+	and #$80
+	beq -
+	rts
+
+video_init:
+	sep #$20 : .as		;8-bit accumulator
+	rep #$10 : .xl		;16-bit index
+	lda #$03		;mode 3, mode 5 via HDMA :D
+	sta $2105
+	lda #$58		;Tilemap addr 0xB000
+	ora #$02		;SC size 32x64
+	sta $2107		;for BG1
+	lda #$50		;Tilemap addr 0xA000
+	ora #$02		;SC size 32x64
+	sta $2108		;for BG2
+	lda #$40		;chr base addr:
+	sta $210b		;BG1=0x0000, BG2=0x8000
+	lda #$01		;cut off leftmost subscreen pixel garbage
+	sta $2126
+	lda #$fe
+	sta $2127
+	lda #$10
+	sta $2130
+	lda #$1f
+	sta $212e
+	sta $212f
+	stz $2121
+	lda #$0f
+	sta $2100		;screen on, full brightness
+	stz $2121
+	lda #$1f		;red background
+	sta $2122
+	stz $2122
+	rts
+
+snes_init:
+	sep #$20 : .as		;8-bit accumulator
+	rep #$10 : .xl		;16-bit index
+	stz $4200		;
+	lda #$ff
+	sta $4201		;
+	stz $4202		;
+	stz $4203		;
+	stz $4204		;
+	stz $4205		;
+	stz $4206		;
+	stz $4207		;
+	stz $4208		;
+	stz $4209		;
+	stz $420a		;
+	stz $420b		;
+	stz $420c		;
+	lda #$8f
+	sta $2100		;INIDISP: force blank
+	lda #$03		; 8x8+16x16; name=0; base=3
+	sta $2101		;
+	stz $2102		;
+	stz $2103		;
+;	stz $2104		; (OAM Data?!)
+;	stz $2104		; (OAM Data?!)
+	stz $2105		;
+	stz $2106		;
+	stz $2107		;
+	stz $2108		;
+	stz $2109		;
+	stz $210a		;
+	stz $210b		;
+	stz $210c		;
+	stz $210d		;
+	stz $210d		;
+	stz $210e		;
+	stz $210e		;
+	stz $210f		;
+	stz $210f		;
+	lda #$05
+	sta $2110		;
+	stz $2110		;
+	stz $2111		;
+	stz $2111		;
+	stz $2112		;
+	stz $2112		;
+	stz $2113		;
+	stz $2113		;
+	stz $2114		;
+	stz $2114		;
+	lda #$80		
+	sta $2115		;
+	stz $2116		;
+	stz $2117		;
+;	stz $2118		;(VRAM Data?!)
+;	stz $2119		;(VRAM Data?!)
+	stz $211a		;
+	stz $211b		;
+	lda #$01
+	sta $211b		;
+	stz $211c		;
+	stz $211c		;
+	stz $211d		;
+	stz $211d		;
+	stz $211e		;
+	sta $211e		;
+	stz $211f		;
+	stz $211f		;
+	stz $2120		;
+	stz $2120		;
+	stz $2121		;
+;	stz $2122		; (CG Data?!)
+;	stz $2122		; (CG Data?!)
+	stz $2123		;
+	stz $2124		;
+	stz $2125		;
+	stz $2126		;
+	stz $2127		;
+	stz $2128		;
+	stz $2129		;
+	stz $212a		;
+	stz $212b		;
+	stz $212c		;
+	stz $212d		;
+	stz $212e		;
+	stz $212f		;
+	lda #$30
+	sta $2130		;
+	stz $2131		;
+	lda #$e0
+	sta $2132		;
+	stz $2133		;
+;clear WRAM lower page
+;        ldx #$0200
+;        stx $2181
+;        lda #$00
+;        sta $2183
+;        DMA0(#$08, #$FF00, #^zero, #!zero, #$80)
+;        ldx #$0000
+;        stx $2181
+;	lda #$00
+;	sta $2183
+;        DMA0(#$08, #$1e0, #^zero, #!zero, #$80)
+
+	rts
+
+