diff --git a/src/dos_m65/assets/dos_parts_dir.s b/src/dos_m65/assets/dos_parts_dir.s
index deb45823..a1805c31 100644
--- a/src/dos_m65/assets/dos_parts_dir.s
+++ b/src/dos_m65/assets/dos_parts_dir.s
@@ -34,20 +34,22 @@ dir_end:                     ; 19 bytes
 
 ; File types / extensions
 
-dir_ext_01: !pet "seq"       ; SEQ
-dir_ext_02: !pet "prg"       ; PRG
-dir_ext_03: !pet "usr"       ; USR
-dir_ext_04: !pet "rel"       ; REL
-dir_ext_05: !pet "dir"       ; directory
-; dir_ext_06: !pet "tap"       ; tape image
-; dir_ext_07: !pet "d67"       ; CBM 2040 (DOS 1)               - disk image
-; dir_ext_08: !pet "d64"       ; CBM 1541 / 2031 / 3040 / 4040  - disk image
-; dir_ext_09: !pet "d71"       ; CBM 1571                       - disk image
-; dir_ext_0A: !pet "d81"       ; CBM 1581                       - disk image
-; dir_ext_0B: !pet "d80"       ; CBM 8050                       - disk image
-; dir_ext_0C: !pet "d81"       ; CBM 8250 / 1001                - disk image
-; dir_ext_0D: !pet "d90"       ; CBM D9060 / D9090              - hard disk image
-; dir_ext_0E: !pet "d1m"       ; CMD FD 2000 / 4000             - disk image (DD)
-; dir_ext_0F: !pet "d2m"       ; CMD FD 2000 / 4000             - disk image (HD)
-; dir_ext_10: !pet "d4m"       ; CMD FD 4000                    - disk image (ED)
-; dir_ext_11: !pet "dhd"       ; CMD HD                         - hard disk image
+dir_types:
+
+	!pet "seq", $00          ; SEQ
+	!pet "prg", $00          ; PRG
+	!pet "usr", $00          ; USR
+	!pet "rel", $00          ; REL
+	!pet "dir", $00          ; directory
+;	!pet "tap", $00          ; tape image
+;	!pet "d67", $00          ; CBM 2040 (DOS 1)               - disk image
+;	!pet "d64", $00          ; CBM 1541 / 2031 / 3040 / 4040  - disk image
+;	!pet "d71", $00          ; CBM 1571                       - disk image
+;	!pet "d81", $00          ; CBM 1581                       - disk image
+;	!pet "d80", $00          ; CBM 8050                       - disk image
+;	!pet "d81", $00          ; CBM 8250 / 1001                - disk image
+;	!pet "d90", $00          ; CBM D9060 / D9090              - hard disk image
+;	!pet "d1m", $00          ; CMD FD 2000 / 4000             - disk image (DD)
+;	!pet "d2m", $00          ; CMD FD 2000 / 4000             - disk image (HD)
+;	!pet "d4m", $00          ; CMD FD 4000                    - disk image (ED)
+;	!pet "dhd", $00          ; CMD HD                         - hard disk image
diff --git a/src/dos_m65/dev_sdcard/fs_hvsr_read_dir.s b/src/dos_m65/dev_sdcard/fs_hvsr_read_dir.s
index ba648a57..9be04389 100644
--- a/src/dos_m65/dev_sdcard/fs_hvsr_read_dir.s
+++ b/src/dos_m65/dev_sdcard/fs_hvsr_read_dir.s
@@ -67,7 +67,25 @@ fs_hvsr_read_dir:
 	; - $00-$3F - file name
 	; - $40     - file name length
 	; - $51-$54 - file length
-	; - $55     - file type and attributes
+	; - $55-$56 - file type ($10 = dir, $20 = regular) and attributes ($01 for read-only)
+
+	; Drop some strange (unknown) file types
+
+	lda SD_DIRENT+$55
+	bne fs_hvsr_read_dir
+
+	; Retrieve read-only status, store mark in SD_DIRENT+$FE
+
+	lda SD_DIRENT+$56
+	and #$01
+	bne @rdonly
+	lda #$00
+	+skip_2_bytes_trash_nvz
+
+@rdonly:
+
+	lda #'<'
+	sta SD_DIRENT+$FF
 
 	; Validate/fix characters in file name
 
@@ -98,9 +116,36 @@ fs_hvsr_read_dir:
 	dex
 	bpl @lp1
 
-	; Validate file name length
+	; Determine type (file/directory), store marker offset in SD_DIRENT+$FE
 
-	; XXX check for directory!
+	lda SD_DIRENT+$56
+	and #$FE
+	
+	; XXX code below does not work
+	;cmp #$20
+	;beq @cklen_file                    ; branch on file
+	;cmp #$10
+	;bne fs_hvsr_read_dir               ; this type is unknown 
+
+	bra @cklen_file ; XXX temporary
+
+@cklen_dir:
+
+	; Validate file name length (directories)
+
+	lda SD_DIRENT+$40
+	beq fs_hvsr_read_dir
+	cmp #$11
+	bcs fs_hvsr_read_dir
+
+	; Set type offset for directory in SD_DIRENT+$FF
+
+	lda #$10
+	bra @all_prepared
+
+@cklen_file:
+
+	; Validate file name length (regular files)
 
 	lda SD_DIRENT+$40
 	sec
@@ -113,15 +158,19 @@ fs_hvsr_read_dir:
 	sta SD_DIRENT+$40                  ; store corrected file name length
 	tax
 
-	; Detect file type (+64 for read-only, +128 = damaged)
+	; Detect file type
 
 	lda SD_DIRENT, x
 	cmp #$2E
-	bne fs_hvsr_read_dir               ; 3-character extension is required!
+	+bne fs_hvsr_read_dir              ; 3-character extension is required!
 
-	; XXX temporary; detect file type by extension instead
+	lda #$04 ; XXX temporary; detect file type by extension instead
 
-	; Try to prepare output row, starting from SD_DIRENT+$80
+@all_prepared:
+
+	sta SD_DIRENT+$FF                  ; store offset to file type in SD_DIRENT+$FF
+
+	; Prepare output entry, starting from SD_DIRENT+$80
 
 	lda #$01                           ; link to the next line - dummy, will be regenerated by BASIC
 	sta SD_DIRENT+$80
@@ -162,20 +211,27 @@ fs_hvsr_read_dir:
 	sta SD_DIRENT+$80, x
 	inx
 
-	; XXX put read-only mark if needed
+	; No 'damaged' mark make sense for this filesystem
 
-	ldy #$03                           ; XXX select proper file type instead
-	lda dir_ext_01+0, y
+	ldy SD_DIRENT+$FF                  ; put file type
+
+@lp3:
+	
+	lda dir_types, y
+	beq @lp3_done
 	sta SD_DIRENT+$80, x
 	inx
-	lda dir_ext_01+1, y
-	sta SD_DIRENT+$80, x
-	inx
-	lda dir_ext_01+2, y
+	iny
+	bra @lp3
+	
+@lp3_done:
+
+	lda SD_DIRENT+$FE                  ; read-only mark (if needed)
+	beq @skipro
 	sta SD_DIRENT+$80, x
 	inx
 
-	; No 'damaged' mark is needed here; put ending 0 and provide pointer
+@skipro:
 
 	lda #$00
 	sta SD_DIRENT+$80, x