diff --git a/asminc/telestrat.inc b/asminc/telestrat.inc
index cb28919c2..956d31be3 100644
--- a/asminc/telestrat.inc
+++ b/asminc/telestrat.inc
@@ -172,7 +172,8 @@ XMUSIC           = $45
 XZAP             = $46
 XSHOOT           = $47
 XMKDIR           = $4B          ; create a folder. Only available in telemon 3.x
-XSOUT            = $67          ; send A register to RS232, available in telemon 2.4 & 3.x
+XRM              = $4D          ; remove a folder or a file. Only available in telemon 3.x
+XSOUT            = $67          ; send accumulator value (A) to RS232, available in telemon 2.4 & 3.x : if RS232 buffer is full, the Oric Telestrat freezes
 XHRSSE           = $8C          ; set hires position cursor
 XDRAWA           = $8D          ; draw a line 
 XDRAWR           = $8E          ; draw a line 
diff --git a/libsrc/telestrat/chline.s b/libsrc/telestrat/chline.s
new file mode 100644
index 000000000..6ead10eee
--- /dev/null
+++ b/libsrc/telestrat/chline.s
@@ -0,0 +1,22 @@
+;
+; jede jede@oric.org 2018-04-17
+;
+
+; void chline (unsigned char length);
+;
+
+        .export         _chline
+        .include        "telestrat.inc"
+        .include        "zeropage.inc"        
+
+
+.proc _chline
+    sta     tmp1
+@loop:
+    lda     #'-'            ; horizontal line screen code
+    BRK_TELEMON  XWR0       ; macro send char to screen (channel 0 in telemon terms)
+    dec     tmp1
+    bne     @loop
+    rts
+.endproc
+
diff --git a/libsrc/telestrat/cputc.s b/libsrc/telestrat/cputc.s
new file mode 100644
index 000000000..b4f2966a4
--- /dev/null
+++ b/libsrc/telestrat/cputc.s
@@ -0,0 +1,15 @@
+; 2018-04-13, Jede (jede@oric.org)
+;
+
+; void cputc (char c);
+;
+
+        .export         _cputc
+
+        .include        "telestrat.inc"
+
+.proc _cputc
+    BRK_TELEMON  XWR0       ; macro send char to screen (channel 0 in telemon terms)
+    rts
+.endproc
+
diff --git a/libsrc/telestrat/sysremove.s b/libsrc/telestrat/sysremove.s
new file mode 100644
index 000000000..565dfc111
--- /dev/null
+++ b/libsrc/telestrat/sysremove.s
@@ -0,0 +1,16 @@
+;
+; Jede, 10.11.2017
+;
+; unsigned char __fastcall__ _sysremove (const char* name);
+;
+
+        .export         __sysremove
+
+
+        .include        "zeropage.inc"
+        .include        "telestrat.inc"
+
+__sysremove:
+        ; Push name
+        BRK_TELEMON(XRM)
+        rts
diff --git a/libsrc/telestrat/write.s b/libsrc/telestrat/write.s
index 8c2bc08f7..4e059a311 100644
--- a/libsrc/telestrat/write.s
+++ b/libsrc/telestrat/write.s
@@ -17,7 +17,7 @@
         sta     ptr2
         txa
         eor     #$FF
-        sta     ptr2+1          ; Remember -count-1
+        sta     ptr2+1          ; remember -count-1
 
         jsr     popax           ; get buf
         sta     ptr1
@@ -32,7 +32,7 @@ next:
         cmp 	#1
         beq 	L1		
 		
-        ; Here it's a file opened
+        ; here it's a file opened
         lda 	ptr1
         sta  	PTR_READ_DEST
         lda 	ptr1+1
@@ -40,6 +40,16 @@ next:
         lda 	ptr3
         ldy 	ptr3+1
         BRK_TELEMON  XFWRITE
+        ;  compute nb of bytes written
+       
+
+        lda     PTR_READ_DEST+1
+        sec
+        sbc     ptr1+1
+        tax			
+        lda     PTR_READ_DEST
+        sec
+        sbc     ptr1
         rts
 		
 		
@@ -50,23 +60,23 @@ L1:     inc     ptr2
 L2:     ldy     #0
         lda     (ptr1),y
         tax
-        cpx     #$0A            ; Check for \n
+        cpx     #$0A            ; check for \n
         bne     L3
-        BRK_TELEMON  XWR0  ; Macro send char to screen (channel 0 in telemon terms)
-        lda     #$0D ; return to the beggining of the line
-        BRK_TELEMON  XWR0  ; Macro ; 
+        BRK_TELEMON  XWR0       ; macro send char to screen (channel 0 in telemon terms)
+        lda     #$0D            ; return to the beggining of the line
+        BRK_TELEMON  XWR0       ; macro
 	
 
         ldx     #$0D
 L3:     
-        BRK_TELEMON  XWR0  ; Macro
+        BRK_TELEMON  XWR0       ; macro
 
         inc     ptr1
         bne     L1
         inc     ptr1+1
         jmp     L1
 
-; No error, return count
+        ; No error, return count
 
 L9:     lda     ptr3
         ldx     ptr3+1