diff --git a/libsrc/atari/Makefile b/libsrc/atari/Makefile
index 349e6d9f5..93eec9f2b 100644
--- a/libsrc/atari/Makefile
+++ b/libsrc/atari/Makefile
@@ -88,6 +88,7 @@ OBJS = 	_scrsize.o      \
 	gotoy.o         \
 	gotoxy.o        \
 	graphics.o      \
+	initcwd.o       \
 	inviocb.o       \
 	joy_stddrv.o    \
 	kbhit.o         \
@@ -107,6 +108,7 @@ OBJS = 	_scrsize.o      \
 	scroll.o        \
 	setcolor.o      \
 	siocall.o       \
+	syschdir.o      \
 	sysmkdir.o      \
 	sysremove.o     \
 	sysrmdir.o      \
diff --git a/libsrc/atari/initcwd.s b/libsrc/atari/initcwd.s
new file mode 100644
index 000000000..54afeb127
--- /dev/null
+++ b/libsrc/atari/initcwd.s
@@ -0,0 +1,33 @@
+;
+; Stefan Haubenthal, 2008-04-29
+;
+
+	.export		initcwd
+	.import		findfreeiocb
+	.import		__cwd
+	.include	"atari.inc"
+
+	.segment	"INIT"
+
+.proc	initcwd
+
+	jsr	findfreeiocb
+	bne	oserr
+	lda	#48
+	sta	ICCOM,x
+	lda	#<__cwd
+	sta	ICBLL,x
+	lda	#>__cwd
+	sta	ICBLH,x
+	jsr	CIOV
+	bmi	oserr
+	ldx	#0		; ATEOL -> \0
+:	lda	__cwd,x
+	inx
+	cmp	#ATEOL
+	bne	:-
+	lda	#0
+	sta	__cwd-1,x
+oserr:	rts
+
+.endproc
diff --git a/libsrc/atari/syschdir.s b/libsrc/atari/syschdir.s
new file mode 100644
index 000000000..901c15e4c
--- /dev/null
+++ b/libsrc/atari/syschdir.s
@@ -0,0 +1,88 @@
+;
+; Stefan Haubenthal, 2005-12-24
+; Based on on code by Christian Groessler
+;
+; unsigned char __fastcall__ _syschdir (const char* name);
+; for SpartaDOS and MyDOS
+;
+
+	.include "atari.inc"
+	.import	findfreeiocb
+	.import	__dos_type
+	.import	initcwd
+	.importzp tmp4
+.ifdef	UCASE_FILENAME
+	.importzp tmp3
+	.import	addysp
+	.import	ucase_fn
+.endif
+	.export	__syschdir
+
+.proc	__syschdir
+
+	pha			; save input parameter
+	txa
+	pha
+
+	jsr	findfreeiocb
+	beq	iocbok		; we found one
+
+	pla
+	pla			; fix up stack
+
+	lda	#TMOF		; too many open files
+	rts
+
+iocbok:	stx	tmp4		; remember IOCB index
+	pla
+	tax
+	pla			; get argument again
+
+.ifdef	UCASE_FILENAME
+
+	jsr	ucase_fn
+	bcc	ucok1
+
+	lda	#182		; see oserror.s
+	rts
+ucok1:
+
+.endif	; defined UCASE_FILENAME
+
+	ldy	tmp4		; IOCB index
+	sta	ICBAL,y		; store pointer to filename
+	txa
+	sta	ICBAH,y
+	tya
+	tax
+	lda	__dos_type
+	cmp	#SPARTADOS
+	beq	:+
+	lda	#41
+	.byte	$2C		; BIT <abs>
+:	lda	#44
+	sta	ICCOM,x
+	lda	#0
+	sta	ICAX1,x
+	sta	ICAX2,x
+	sta	ICBLL,x
+	sta	ICBLH,x
+	jsr	CIOV
+
+.ifdef	UCASE_FILENAME
+	tya
+	pha
+	ldy	tmp3		; get size
+	jsr	addysp		; free used space on the stack
+	pla
+	tay
+.endif	; defined UCASE_FILENAME
+
+	bmi	cioerr
+	jsr	initcwd
+	lda	#0
+	rts
+cioerr:	tya
+	rts
+
+.endproc	; __syschdir