diff --git a/Makefile b/Makefile
index 655089a..89543c7 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-all:    ram2e140.po
+all:    ram2e140.po ram2e140.dbg.po
 
 .PHONY: clean
 
@@ -14,12 +14,23 @@ obj/ram2e.o: obj ram2e.c
 	cc65 ram2e.c -O --cpu 6502 -t apple2enh -o obj/ram2e.s
 	ca65 obj/ram2e.s -o obj/ram2e.o
 
-ram2e140.po: bin/ram2e.sys
-	cp prodos140.po bin/ram2e140.po
-	cat bin/ram2e.sys | java -jar ./AppleCommander-ac-1.6.0.jar -p bin/ram2e140.po ram2e.system sys 0x2000
+obj/ram2e.dbg.o: obj ram2e.c
+	cc65 ram2e.c -O --cpu 6502 -t apple2enh -o obj/ram2e.dbg.s -DSKIP_RAM2E_DETECT
+	ca65 obj/ram2e.dbg.s -o obj/ram2e.dbg.o
 
 bin/ram2e.sys: bin obj/ram2e.o
 	ld65 -o bin/ram2e.sys obj/ram2e.o -C apple2enh-system.cfg --lib apple2enh.lib -D __EXEHDR__=0
 
+bin/ram2e.dbg.sys: bin obj/ram2e.dbg.o
+	ld65 -o bin/ram2e.dbg.sys obj/ram2e.dbg.o -C apple2enh-system.cfg --lib apple2enh.lib -D __EXEHDR__=0
+
+ram2e140.po: bin/ram2e.sys
+	cp prodos140.po bin/ram2e140.po
+	cat bin/ram2e.sys | java -jar ./AppleCommander-ac-1.6.0.jar -p bin/ram2e140.po ram2e.system sys 0x2000
+
+ram2e140.dbg.po: bin/ram2e.dbg.sys
+	cp prodos140.po bin/ram2e140.dbg.po
+	cat bin/ram2e.dbg.sys | java -jar ./AppleCommander-ac-1.6.0.jar -p bin/ram2e140.dbg.po ram2e.system sys 0x2000
+
 clean:
 	rm -fr bin obj
diff --git a/bin/ram2e140.dbg.po b/bin/ram2e140.dbg.po
new file mode 100644
index 0000000..846d30b
Binary files /dev/null and b/bin/ram2e140.dbg.po differ
diff --git a/obj/ram2e.dbg.s b/obj/ram2e.dbg.s
new file mode 100644
index 0000000..0470f4f
--- /dev/null
+++ b/obj/ram2e.dbg.s
@@ -0,0 +1,805 @@
+;
+; File generated by cc65 v 2.18 - Git N/A
+;
+	.fopt		compiler,"cc65 v 2.18 - Git N/A"
+	.setcpu		"6502"
+	.smart		on
+	.autoimport	on
+	.case		on
+	.debuginfo	off
+	.importzp	sp, sreg, regsave, regbank
+	.importzp	tmp1, tmp2, tmp3, tmp4, ptr1, ptr2, ptr3, ptr4
+	.macpack	longbranch
+	.forceimport	__STARTUP__
+	.import		_get_ostype
+	.import		_clrscr
+	.import		_gotoxy
+	.import		_cputs
+	.import		_cgetc
+	.import		_printf
+	.import		_putchar
+	.import		_toupper
+	.export		_SPIN_HALFCYCLES
+	.export		_SPIN_FRAMESPERCHAR
+	.export		__cmd
+	.export		__arg
+	.export		__detect
+	.export		__rwsize
+	.export		_main
+
+.segment	"RODATA"
+
+_SPIN_HALFCYCLES:
+	.byte	$03
+_SPIN_FRAMESPERCHAR:
+	.byte	$04
+L0159:
+	.byte	$6E,$6F,$6E,$76,$6F,$6C,$61,$74,$69,$6C,$65,$20,$6D,$65,$6D,$6F
+	.byte	$72,$79,$2C,$20,$70,$72,$65,$73,$73,$20,$41,$70,$70,$6C,$65,$2B
+	.byte	$6E,$75,$6D,$62,$65,$72,$2E,$00
+L014D:
+	.byte	$43,$61,$70,$61,$63,$69,$74,$79,$20,$77,$69,$6C,$6C,$20,$62,$65
+	.byte	$20,$73,$61,$76,$65,$64,$20,$75,$6E,$74,$69,$6C,$20,$70,$6F,$77
+	.byte	$65,$72,$2D,$6F,$66,$66,$2E,$00
+L01BD:
+	.byte	$20,$54,$48,$49,$53,$20,$50,$52,$4F,$47,$52,$41,$4D,$20,$52,$45
+	.byte	$51,$55,$49,$52,$45,$53,$20,$41,$4E,$20,$41,$50,$50,$4C,$45,$20
+	.byte	$49,$49,$45,$2E,$00
+L022B:
+	.byte	$52,$41,$4D,$32,$45,$20,$63,$61,$70,$61,$63,$69,$74,$79,$20,$73
+	.byte	$61,$76,$65,$64,$20,$73,$75,$63,$63,$65,$73,$73,$66,$75,$6C,$6C
+	.byte	$79,$2E,$00
+L023E:
+	.byte	$59,$6F,$75,$20,$6D,$61,$79,$20,$61,$6C,$73,$6F,$20,$74,$75,$72
+	.byte	$6E,$20,$6F,$66,$66,$20,$79,$6F,$75,$72,$20,$41,$70,$70,$6C,$65
+	.byte	$2E,$00
+L015F:
+	.byte	$50,$72,$65,$73,$73,$20,$5B,$51,$5D,$20,$74,$6F,$20,$71,$75,$69
+	.byte	$74,$20,$77,$69,$74,$68,$6F,$75,$74,$20,$73,$61,$76,$69,$6E,$67
+	.byte	$2E,$00
+L0232:
+	.byte	$52,$41,$4D,$32,$45,$20,$63,$61,$70,$61,$63,$69,$74,$79,$20,$73
+	.byte	$65,$74,$20,$73,$75,$63,$63,$65,$73,$73,$66,$75,$6C,$6C,$79,$2E
+	.byte	$00
+L0129:
+	.byte	$53,$65,$6C,$65,$63,$74,$20,$64,$65,$73,$69,$72,$65,$64,$20,$6D
+	.byte	$65,$6D,$6F,$72,$79,$20,$63,$61,$70,$61,$63,$69,$74,$79,$3A,$00
+L0153:
+	.byte	$54,$6F,$20,$72,$65,$6D,$65,$6D,$62,$65,$72,$20,$63,$61,$70,$61
+	.byte	$63,$69,$74,$79,$20,$73,$65,$74,$74,$69,$6E,$67,$20,$69,$6E,$00
+L0219:
+	.byte	$53,$61,$76,$69,$6E,$67,$20,$52,$41,$4D,$32,$45,$20,$63,$61,$70
+	.byte	$61,$63,$69,$74,$79,$20,$73,$65,$74,$74,$69,$6E,$67,$2E,$00
+L0122:
+	.byte	$43,$75,$72,$72,$65,$6E,$74,$20,$52,$41,$4D,$32,$45,$20,$63,$61
+	.byte	$70,$61,$63,$69,$74,$79,$3A,$20,$25,$64,$20,$6B,$42,$00
+L011C:
+	.byte	$2D,$2D,$20,$52,$41,$4D,$32,$45,$20,$43,$61,$70,$61,$63,$69,$74
+	.byte	$79,$20,$53,$65,$74,$74,$69,$6E,$67,$73,$20,$2D,$2D,$00
+L021F:
+	.byte	$44,$6F,$20,$6E,$6F,$74,$20,$74,$75,$72,$6E,$20,$6F,$66,$66,$20
+	.byte	$79,$6F,$75,$72,$20,$41,$70,$70,$6C,$65,$2E,$00
+L01D5:
+	.byte	$20,$50,$72,$65,$73,$73,$20,$61,$6E,$79,$20,$6B,$65,$79,$20,$74
+	.byte	$6F,$20,$71,$75,$69,$74,$2E,$00
+L01C3:
+	.byte	$20,$50,$52,$45,$53,$53,$20,$41,$4E,$59,$20,$4B,$45,$59,$20,$54
+	.byte	$4F,$20,$51,$55,$49,$54,$2E,$00
+L01CF:
+	.byte	$20,$4E,$6F,$20,$52,$41,$4D,$32,$45,$20,$49,$49,$20,$64,$65,$74
+	.byte	$65,$63,$74,$65,$64,$2E,$00
+L0238	:=	L01D5+1
+L0135:
+	.byte	$32,$2E,$20,$35,$31,$32,$20,$6B,$69,$6C,$6F,$62,$79,$74,$65,$73
+	.byte	$00
+L012F:
+	.byte	$31,$2E,$20,$36,$34,$20,$6B,$69,$6C,$6F,$62,$79,$74,$65,$73,$00
+L0141:
+	.byte	$34,$2E,$20,$34,$20,$6D,$65,$67,$61,$62,$79,$74,$65,$73,$00
+L0147:
+	.byte	$35,$2E,$20,$38,$20,$6D,$65,$67,$61,$62,$79,$74,$65,$73,$00
+L013B:
+	.byte	$33,$2E,$20,$31,$20,$6D,$65,$67,$61,$62,$79,$74,$65,$00
+
+.segment	"BSS"
+
+__cmd:
+	.res	1,$00
+__arg:
+	.res	1,$00
+__detect:
+	.res	1,$00
+__rwsize:
+	.res	1,$00
+
+; ---------------------------------------------------------------
+; unsigned char __near__ read_applekey (void)
+; ---------------------------------------------------------------
+
+.segment	"CODE"
+
+.proc	_read_applekey: near
+
+.segment	"CODE"
+
+	ldx     #$00
+	lda     $C062
+	ora     $C061
+	and     #$80
+	rts
+
+.endproc
+
+; ---------------------------------------------------------------
+; void __near__ ram2e_cmd (unsigned char, unsigned char)
+; ---------------------------------------------------------------
+
+.segment	"CODE"
+
+.proc	_ram2e_cmd: near
+
+.segment	"CODE"
+
+	jsr     pusha
+	ldy     #$01
+	lda     (sp),y
+	sta     __cmd
+	dey
+	lda     (sp),y
+	sta     __arg
+	ldx     __cmd
+	ldy     __arg
+	lda     #0
+	sta     $C073
+	sta     $C073
+	lda     #$FF
+	sta     $C073
+	lda     #$00
+	sta     $C073
+	lda     #$55
+	sta     $C073
+	lda     #$AA
+	sta     $C073
+	lda     #$C1
+	sta     $C073
+	lda     #$AD
+	sta     $C073
+	stx     $C073
+	sty     $C073
+	lda     #0
+	sta     $C073
+	jmp     incsp2
+
+.endproc
+
+; ---------------------------------------------------------------
+; unsigned char __near__ auxram_detect (void)
+; ---------------------------------------------------------------
+
+.segment	"CODE"
+
+.proc	_auxram_detect: near
+
+.segment	"CODE"
+
+	lda     #$00
+	sta     $C009
+	sta     $C073
+	sta     $00
+	lda     #$FF
+	sta     $01
+	lda     #$55
+	sta     $02
+	lda     #$AA
+	sta     $03
+	lda     $00
+	bne     L0058
+	lda     $01
+	cmp     #$FF
+	bne     L0058
+	lda     $02
+	cmp     #$55
+	bne     L0058
+	lda     $03
+	cmp     #$AA
+	bne     L0058
+	sta     $C008
+	ldx     #$00
+	lda     #$01
+	rts
+L0058:	sta     $C008
+	ldx     #$00
+	txa
+	rts
+
+.endproc
+
+; ---------------------------------------------------------------
+; unsigned char __near__ ram2e_detect (void)
+; ---------------------------------------------------------------
+
+.segment	"CODE"
+
+.proc	_ram2e_detect: near
+
+.segment	"CODE"
+
+	ldx     #$00
+	lda     #$01
+	rts
+
+.endproc
+
+; ---------------------------------------------------------------
+; unsigned char __near__ ramworks_getsize (void)
+; ---------------------------------------------------------------
+
+.segment	"CODE"
+
+.proc	_ramworks_getsize: near
+
+.segment	"CODE"
+
+	sta     $C009
+	ldy     #$FF
+L00B4:	sty     $C073
+	sty     $00
+	dey
+	cpy     #$FF
+	bne     L00B4
+	iny
+	ldx     #$00
+L00C5:	sty     $C073
+	cpy     $00
+	bne     L00CD
+	inx
+L00CD:	iny
+	bne     L00C5
+	sta     $C008
+	stx     __rwsize
+	ldx     #$00
+	lda     __rwsize
+	rts
+
+.endproc
+
+; ---------------------------------------------------------------
+; void __near__ set_mask_temp (unsigned char)
+; ---------------------------------------------------------------
+
+.segment	"CODE"
+
+.proc	_set_mask_temp: near
+
+.segment	"CODE"
+
+	jsr     pusha
+	lda     #$E0
+	jsr     pusha
+	ldy     #$01
+	lda     (sp),y
+	jsr     _ram2e_cmd
+	jmp     incsp1
+
+.endproc
+
+; ---------------------------------------------------------------
+; void __near__ ufm_bitbang (unsigned char)
+; ---------------------------------------------------------------
+
+.segment	"CODE"
+
+.proc	_ufm_bitbang: near
+
+.segment	"CODE"
+
+	jsr     pusha
+	lda     #$EA
+	jsr     pusha
+	ldy     #$01
+	lda     (sp),y
+	jsr     _ram2e_cmd
+	jmp     incsp1
+
+.endproc
+
+; ---------------------------------------------------------------
+; void __near__ ufm_program (void)
+; ---------------------------------------------------------------
+
+.segment	"CODE"
+
+.proc	_ufm_program: near
+
+.segment	"CODE"
+
+	lda     #$EF
+	jsr     pusha
+	lda     #$00
+	jmp     _ram2e_cmd
+
+.endproc
+
+; ---------------------------------------------------------------
+; void __near__ ufm_erase (void)
+; ---------------------------------------------------------------
+
+.segment	"CODE"
+
+.proc	_ufm_erase: near
+
+.segment	"CODE"
+
+	lda     #$EE
+	jsr     pusha
+	lda     #$00
+	jmp     _ram2e_cmd
+
+.endproc
+
+; ---------------------------------------------------------------
+; void __near__ set_nvm (unsigned char)
+; ---------------------------------------------------------------
+
+.segment	"CODE"
+
+.proc	_set_nvm: near
+
+.segment	"CODE"
+
+	jsr     pusha
+	jsr     decsp2
+	ldx     #$00
+	txa
+L0244:	jsr     stax0sp
+	cmp     #$02
+	txa
+	sbc     #$00
+	bvc     L00F4
+	eor     #$80
+L00F4:	bpl     L00EE
+	ldy     #$02
+	lda     (sp),y
+	lsr     a
+	and     #$40
+	ora     #$80
+	jsr     _ufm_bitbang
+	ldy     #$02
+	lda     (sp),y
+	and     #$40
+	ora     #$80
+	jsr     _ufm_bitbang
+	ldy     #$02
+	lda     (sp),y
+	asl     a
+	and     #$40
+	ora     #$80
+	jsr     _ufm_bitbang
+	ldy     #$02
+	lda     (sp),y
+	asl     a
+	asl     a
+	and     #$40
+	ora     #$80
+	jsr     _ufm_bitbang
+	ldy     #$02
+	lda     (sp),y
+	asl     a
+	asl     a
+	asl     a
+	and     #$40
+	ora     #$80
+	jsr     _ufm_bitbang
+	ldy     #$02
+	lda     (sp),y
+	asl     a
+	asl     a
+	asl     a
+	asl     a
+	and     #$40
+	ora     #$80
+	jsr     _ufm_bitbang
+	ldy     #$02
+	lda     (sp),y
+	asl     a
+	asl     a
+	asl     a
+	asl     a
+	asl     a
+	and     #$40
+	ora     #$80
+	jsr     _ufm_bitbang
+	ldy     #$02
+	lda     (sp),y
+	asl     a
+	asl     a
+	asl     a
+	asl     a
+	asl     a
+	asl     a
+	and     #$40
+	ora     #$80
+	jsr     _ufm_bitbang
+	jsr     ldax0sp
+	jsr     incax1
+	jmp     L0244
+L00EE:	jsr     _ufm_program
+	jmp     incsp3
+
+.endproc
+
+; ---------------------------------------------------------------
+; void __near__ menu (void)
+; ---------------------------------------------------------------
+
+.segment	"CODE"
+
+.proc	_menu: near
+
+.segment	"CODE"
+
+	lda     #$05
+	jsr     pusha
+	lda     #$01
+	jsr     _gotoxy
+	lda     #<(L011C)
+	ldx     #>(L011C)
+	jsr     _cputs
+	lda     #$04
+	jsr     pusha
+	lda     #$03
+	jsr     _gotoxy
+	lda     #<(L0122)
+	ldx     #>(L0122)
+	jsr     pushax
+	jsr     _ramworks_getsize
+	jsr     shlax4
+	jsr     shlax2
+	jsr     pushax
+	ldy     #$04
+	jsr     _printf
+	lda     #$01
+	jsr     pusha
+	lda     #$05
+	jsr     _gotoxy
+	lda     #<(L0129)
+	ldx     #>(L0129)
+	jsr     _cputs
+	lda     #$04
+	jsr     pusha
+	lda     #$07
+	jsr     _gotoxy
+	lda     #<(L012F)
+	ldx     #>(L012F)
+	jsr     _cputs
+	lda     #$04
+	jsr     pusha
+	lda     #$09
+	jsr     _gotoxy
+	lda     #<(L0135)
+	ldx     #>(L0135)
+	jsr     _cputs
+	lda     #$04
+	jsr     pusha
+	lda     #$0B
+	jsr     _gotoxy
+	lda     #<(L013B)
+	ldx     #>(L013B)
+	jsr     _cputs
+	lda     #$04
+	jsr     pusha
+	lda     #$0D
+	jsr     _gotoxy
+	lda     #<(L0141)
+	ldx     #>(L0141)
+	jsr     _cputs
+	lda     #$04
+	jsr     pusha
+	lda     #$0F
+	jsr     _gotoxy
+	lda     #<(L0147)
+	ldx     #>(L0147)
+	jsr     _cputs
+	lda     #$01
+	jsr     pusha
+	lda     #$12
+	jsr     _gotoxy
+	lda     #<(L014D)
+	ldx     #>(L014D)
+	jsr     _cputs
+	lda     #$01
+	jsr     pusha
+	lda     #$14
+	jsr     _gotoxy
+	lda     #<(L0153)
+	ldx     #>(L0153)
+	jsr     _cputs
+	lda     #$01
+	jsr     pusha
+	lda     #$15
+	jsr     _gotoxy
+	lda     #<(L0159)
+	ldx     #>(L0159)
+	jsr     _cputs
+	lda     #$01
+	jsr     pusha
+	lda     #$17
+	jsr     _gotoxy
+	lda     #<(L015F)
+	ldx     #>(L015F)
+	jmp     _cputs
+
+.endproc
+
+; ---------------------------------------------------------------
+; void __near__ spin (unsigned char, unsigned char)
+; ---------------------------------------------------------------
+
+.segment	"CODE"
+
+.proc	_spin: near
+
+.segment	"CODE"
+
+	jsr     pusha
+	jsr     decsp1
+L0162:	ldx     $C019
+	bpl     L0162
+	lda     #$00
+	tay
+L0256:	sta     (sp),y
+	cmp     _SPIN_HALFCYCLES
+	jcs     L0252
+	jsr     decsp1
+	lda     #$00
+	tay
+L0254:	sta     (sp),y
+	cmp     #$04
+	bcs     L0171
+	jsr     decsp2
+	ldy     #$02
+	lda     (sp),y
+	beq     L024A
+	cmp     #$01
+	beq     L024B
+	cmp     #$02
+	beq     L024C
+	cmp     #$03
+	beq     L024E
+	jmp     L024E
+L024A:	lda     #$5C
+	jmp     L0253
+L024B:	lda     #$7C
+	jmp     L0253
+L024C:	lda     #$2F
+	jmp     L0253
+L024E:	lda     #$2D
+L0253:	dey
+	sta     (sp),y
+	ldy     #$05
+	lda     (sp),y
+	jsr     pusha
+	ldy     #$05
+	lda     (sp),y
+	jsr     _gotoxy
+	ldy     #$01
+	lda     (sp),y
+	ldx     #$00
+	jsr     _putchar
+	lda     #$00
+	tay
+L0255:	sta     (sp),y
+	cmp     _SPIN_FRAMESPERCHAR
+	bcs     L0194
+L0251:	lda     $C019
+	asl     a
+	bcs     L0251
+L01A1:	ldx     $C019
+	bpl     L01A1
+	ldy     #$00
+	lda     (sp),y
+	clc
+	adc     #$01
+	jmp     L0255
+L0194:	jsr     incsp2
+	ldy     #$00
+	lda     (sp),y
+	clc
+	adc     #$01
+	jmp     L0254
+L0171:	jsr     incsp1
+	lda     (sp),y
+	clc
+	adc     #$01
+	jmp     L0256
+L0252:	lda     $C019
+	asl     a
+	bcs     L0252
+L01AD:	ldx     $C019
+	bpl     L01AD
+	jmp     incsp3
+
+.endproc
+
+; ---------------------------------------------------------------
+; int __near__ main (void)
+; ---------------------------------------------------------------
+
+.segment	"CODE"
+
+.proc	_main: near
+
+.segment	"CODE"
+
+	jsr     decsp4
+	jsr     _clrscr
+	jsr     _get_ostype
+	and     #$F0
+	cmp     #$30
+	beq     L01B5
+	lda     #$00
+	jsr     pusha
+	lda     #$08
+	jsr     _gotoxy
+	lda     #<(L01BD)
+	ldx     #>(L01BD)
+	jsr     _cputs
+	lda     #$00
+	jsr     pusha
+	lda     #$0A
+	jsr     _gotoxy
+	lda     #<(L01C3)
+	ldx     #>(L01C3)
+	jmp     L0264
+L01B5:	jsr     _auxram_detect
+	tax
+	beq     L0259
+	jsr     _ram2e_detect
+	tax
+	bne     L01C8
+L0259:	jsr     pusha
+	lda     #$08
+	jsr     _gotoxy
+	lda     #<(L01CF)
+	ldx     #>(L01CF)
+	jsr     _cputs
+	lda     #$00
+	jsr     pusha
+	lda     #$0A
+	jsr     _gotoxy
+	lda     #<(L01D5)
+	ldx     #>(L01D5)
+	jmp     L0264
+L01C8:	jsr     _menu
+	lda     #$00
+	ldy     #$03
+	sta     (sp),y
+	dey
+	sta     (sp),y
+	tax
+L0262:	jsr     stax0sp
+L01E1:	jsr     _cgetc
+	ldx     #$00
+	jsr     _toupper
+	cpx     #$00
+	bne     L01E1
+	cmp     #$31
+	beq     L025A
+	cmp     #$32
+	beq     L025B
+	cmp     #$33
+	beq     L025C
+	cmp     #$34
+	beq     L025D
+	cmp     #$35
+	beq     L025E
+	cmp     #$51
+	jeq     L0261
+	cmp     #$52
+	beq     L0202
+	jmp     L01E1
+L025A:	txa
+	ldy     #$03
+	sta     (sp),y
+	jmp     L01E8
+L025B:	lda     #$07
+	ldy     #$03
+	sta     (sp),y
+	jmp     L01E8
+L025C:	lda     #$0F
+	ldy     #$03
+	sta     (sp),y
+	jmp     L01E8
+L025D:	lda     #$3F
+	ldy     #$03
+	sta     (sp),y
+	jmp     L01E8
+L025E:	lda     #$7F
+	ldy     #$03
+	sta     (sp),y
+	jmp     L01E8
+L0202:	jsr     ldax0sp
+	cmp     #$80
+	txa
+	sbc     #$00
+	bvs     L0205
+	eor     #$80
+L0205:	bpl     L0203
+	jsr     _ufm_erase
+	ldx     #$00
+	txa
+	jmp     L0262
+L0203:	jsr     ldax0sp
+	jsr     incax1
+	jmp     L0262
+L01E8:	jsr     _read_applekey
+	tax
+	beq     L01E2
+	lda     #$01
+	ldy     #$02
+	sta     (sp),y
+L01E2:	ldy     #$03
+	lda     (sp),y
+	jsr     _set_mask_temp
+	jsr     _clrscr
+	ldy     #$02
+	lda     (sp),y
+	beq     L0213
+	lda     #$01
+	jsr     pusha
+	lda     #$08
+	jsr     _gotoxy
+	lda     #<(L0219)
+	ldx     #>(L0219)
+	jsr     _cputs
+	lda     #$01
+	jsr     pusha
+	lda     #$09
+	jsr     _gotoxy
+	lda     #<(L021F)
+	ldx     #>(L021F)
+	jsr     _cputs
+	ldy     #$03
+	lda     (sp),y
+	jsr     _set_nvm
+	lda     #$20
+	jsr     pusha
+	lda     #$08
+	jsr     _spin
+	jsr     _clrscr
+	lda     #$01
+	jsr     pusha
+	lda     #$08
+	jsr     _gotoxy
+	lda     #<(L022B)
+	ldx     #>(L022B)
+	jmp     L0258
+L0213:	lda     #$01
+	jsr     pusha
+	lda     #$08
+	jsr     _gotoxy
+	lda     #<(L0232)
+	ldx     #>(L0232)
+L0258:	jsr     _cputs
+	lda     #$01
+	jsr     pusha
+	lda     #$0A
+	jsr     _gotoxy
+	lda     #<(L0238)
+	ldx     #>(L0238)
+	jsr     _cputs
+	lda     #$01
+	jsr     pusha
+	lda     #$0B
+	jsr     _gotoxy
+	lda     #<(L023E)
+	ldx     #>(L023E)
+L0264:	jsr     _cputs
+	jsr     _cgetc
+L0261:	jsr     _clrscr
+	ldx     #$00
+	txa
+	jmp     incsp4
+
+.endproc
+
diff --git a/ram2e.c b/ram2e.c
index f4a238b..799a1df 100644
--- a/ram2e.c
+++ b/ram2e.c
@@ -58,6 +58,127 @@ static void ram2e_cmd(char cmd, char arg) {
 	__asm__("sta $C073");
 }
 
+/* auxram_detect() returns true if a RAMWorks memory is detected */
+static char auxram_detect() {
+	// Switch to RW bank 0 for ZP
+	__asm__("lda #$00"); // Get 0x00
+	__asm__("sta $C009"); // Store in ALTZP
+	__asm__("sta $C073"); // Set RW bank 0
+
+	// Store 00 FF 55 AA in RW bank 0 ZP
+	__asm__("lda #$00");
+	__asm__("sta $00");
+	__asm__("lda #$FF");
+	__asm__("sta $01");
+	__asm__("lda #$55");
+	__asm__("sta $02");
+	__asm__("lda #$AA");
+	__asm__("sta $03");
+
+	// Check for 00 FF 55 AA
+	__asm__("lda $00");
+	__asm__("cmp #$00");
+	__asm__("bne %g", noramworks);
+	__asm__("lda $01");
+	__asm__("cmp #$FF");
+	__asm__("bne %g", noramworks);
+	__asm__("lda $02");
+	__asm__("cmp #$55");
+	__asm__("bne %g", noramworks);
+	__asm__("lda $03");
+	__asm__("cmp #$AA");
+	__asm__("bne %g", noramworks);
+
+	// Found aux ram card
+	__asm__("sta $C008"); // Don't store in ALTZP
+	return true;
+
+	// Not found
+	noramworks:
+	__asm__("sta $C008"); // Don't store in ALTZP
+	return false;
+}
+
+/* ram2e_detect() returns true if a RAM2E II has been detected */
+uint8_t _detect;
+static char ram2e_detect() {
+	#ifdef SKIP_RAM2E_DETECT
+	return true;
+	#endif
+	__asm__("sta $C009"); // Store in ALTZP
+	
+	// Store 0x00 at beginning of bank 0x00
+	__asm__("lda #$00");
+	__asm__("sta $C073");
+	__asm__("sta $00");
+
+	// Send SetRWBankFF command
+	__asm__("lda #$FF");
+	__asm__("sta $C073");
+	__asm__("lda #$00");
+	__asm__("sta $C073");
+	__asm__("lda #$55");
+	__asm__("sta $C073");
+	__asm__("lda #$AA");
+	__asm__("sta $C073");
+	__asm__("lda #$C1");
+	__asm__("sta $C073");
+	__asm__("lda #$AD");
+	__asm__("sta $C073");
+	__asm__("lda #$FF");
+	__asm__("sta $C073");
+	__asm__("lda #$00");
+	__asm__("sta $C073");
+	// Now bank should be 0xFF if we are running on a RAM2E II
+	// Other RAMWorks cards will instead set the bank to 0x00
+
+	// Store 0xFF in this bank
+	__asm__("lda #$FF");
+	__asm__("sta $00");
+
+	// Go back to bank 0
+	__asm__("lda #$00");
+	__asm__("sta $C073");
+
+	// Save result and return
+	__asm__("lda $00"); // Get beginning of bank 0
+	__asm__("sta $C008"); // Store in STDZP
+	__asm__("sta %v", _detect); // Save in _detect
+	return _detect == 0x00;
+}
+
+/* ramworks_getsize() returns the number of banks of RAM2E aux memory */
+uint8_t _rwsize;
+static uint8_t ramworks_getsize() {
+	// Store bank number at address 0 in each bnak
+	__asm__("sta $C009"); // ALTZP
+	__asm__("ldy #$FF"); // Start at bank 0xFF
+	BankSetLoop:
+	__asm__("sty $C073"); // Set bank
+	__asm__("sty $00"); // Store bank number at 0
+	__asm__("dey"); // Prev. bank
+	__asm__("cpy #$FF"); // Have we wrapped around?
+	__asm__("bne %g", BankSetLoop); // If not, repeat
+
+	// Count banks with matching bank number
+	__asm__("ldy #$00"); // Y is bank
+	__asm__("ldx #$00"); // X is count
+	CountLoop:
+	__asm__("sty $C073"); // Set bank
+	__asm__("cpy $00"); // Is bank num stored at address 0?
+	__asm__("bne %g", NotMem); // If not, skip increment
+	__asm__("inx"); // If so, increment bank count
+	NotMem:
+	__asm__("iny"); // Move to next bank
+	__asm__("bne %g", CountLoop); // Repeat if not on bank 0
+
+	// Done. Switch back to regular zeropage and get result.
+	__asm__("sta $C008"); // STDZP
+	__asm__("stx %v", _rwsize); // _rwsize = X (bank count)
+
+	return _rwsize;
+}
+
 /* set_mask_temp(...) sends the "Set RAMWorks Capacity Mask" to the RAM2E */
 static void set_mask_temp(char mask) { ram2e_cmd(0xE0, mask); }
 
@@ -92,30 +213,32 @@ static void menu(void)
 {
 	gotoxy(5, 1);
 	cputs("-- RAM2E Capacity Settings --");
+	gotoxy(4, 3);
+	printf("Current RAM2E capacity: %d kB", ramworks_getsize() * 64);
 
-	gotoxy(1, 4);
+	gotoxy(1, 5);
 	cputs("Select desired memory capacity:");
 
-	gotoxy(4, 6);
+	gotoxy(4, 7);
 	cputs("1. 64 kilobytes");
-	gotoxy(4, 8);
+	gotoxy(4, 9);
 	cputs("2. 512 kilobytes");
-	gotoxy(4, 10);
+	gotoxy(4, 11);
 	cputs("3. 1 megabyte");
-	gotoxy(4, 12);
+	gotoxy(4, 13);
 	cputs("4. 4 megabytes");
-	gotoxy(4, 14);
+	gotoxy(4, 15);
 	cputs("5. 8 megabytes");
 
-	gotoxy(1, 17);
+	gotoxy(1, 18);
 	cputs("Capacity will be saved until power-off.");
 
-	gotoxy(1, 19);
-	cputs("To remember capacity setting in");
 	gotoxy(1, 20);
+	cputs("To remember capacity setting in");
+	gotoxy(1, 21);
 	cputs("nonvolatile memory, press Apple+number.");
 
-	gotoxy(1, 22);
+	gotoxy(1, 23);
 	cputs("Press [Q] to quit without saving.");
 }
 
@@ -180,8 +303,19 @@ int main(void)
 		return EXIT_SUCCESS;
 	}
 
-	// Show menu
-	menu();
+	// Check for RAM2E
+	if(!auxram_detect() || !ram2e_detect()) {
+		// If no RAM2E, show an error message and quit
+		gotoxy(0, 8);
+		cputs(" No RAM2E II detected.");
+		gotoxy(0, 10);
+		cputs(" Press any key to quit.");
+		cgetc(); // Wait for key
+		clrscr(); // Clear screen before quitting
+		return EXIT_SUCCESS;
+	}
+
+	menu(); // Print menu
 
 	// Get user choice from menu
 	mask = 0;