diff --git a/testcode/lib/ft.c b/testcode/lib/ft.c
new file mode 100644
index 000000000..e62a32517
--- /dev/null
+++ b/testcode/lib/ft.c
@@ -0,0 +1,108 @@
+/*
+ * simple file i/o test
+ *
+ * 12-Jun-2000, Christian Groessler
+ *
+ * please compile with
+ *   cl65 -tsystem ft.c getsp.s -o ft.com
+ *
+ * The program asks for a filename (if it hasn't
+ * got one from argv). I then opens the file,
+ * reads the the first 16 bytes and displays them
+ * (as hex values).
+ * The values of sp (cc65 runtime stack pointer)
+ * are displayed at some places. The displayed
+ * value should always be the same.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <conio.h>
+
+extern int getsp(void);  /* is provided in getsp.s */
+
+#ifdef __ATARI__  /* Atari's fd indirection table */
+extern char fd_index[];
+struct fd_t {
+  char usage;
+  char iocb;
+  char dev;
+  char flag;
+};
+extern struct fd_t fd_table[];
+#endif /* #ifdef __ATARI__ */
+
+int main(int argc,char **argv)
+{
+    char *filename,*x;
+    char buf[20];
+    int i,l,lr;
+    int fd;
+    int csp;
+
+    if (argc >= 2) {
+        filename = *(argv+1);
+    }
+    else {
+        printf("\nfilename: ");
+        x = fgets(buf,19,stdin);
+        printf("\n");
+        if (!x) {
+            printf("nothing read\n");
+            return(0);
+        }
+#if 0
+        l = strlen(x);
+        printf("read: ");
+        for (i=0; i<l; i++) printf("%02X ",*(x+i)); printf("\n");
+#endif
+        filename = x;
+    }
+    printf("using filename \"%s\"\n",filename);
+    csp = getsp();
+    printf("now opening file... sp = %d\n",csp);
+    fd = open(filename,O_RDONLY);
+    csp = getsp();
+    if (fd == -1) {
+        char x1 = _oserror;
+        printf("open failed: os: %d,\n\terrno: %d, sp = %d\n",x1,errno,csp);
+        cgetc();
+        return(0);
+    }
+    printf("open success -- handle = $%x, sp = %d\n",fd,csp);
+#ifdef __ATARI__
+    printf("fd_index:\n ");
+    for (i=0; i<12; i++) printf("%02X ",fd_index[i]);
+    printf("\nfd_table:\n");
+    for (i=0; i<8; i++) {
+        printf(" usa: %d, iocb: %02X, dev: %02X\n",
+               fd_table[i].usage,
+               fd_table[i].iocb,
+               fd_table[i].dev);
+    }
+#endif /* #ifdef __ATARI__ */
+    lr = read(fd,buf,16);  /* read first 16 bytes */
+    csp = getsp();
+    if (lr == -1) {
+        printf("read failed: %d (sp = %d)\n",errno,csp);
+        cgetc();
+        return(0);
+    }
+    l = close(fd);
+    if (l == -1) {
+        printf("close failed: %d\n",errno);
+        cgetc();
+        return(0);
+    }
+    csp = getsp();
+    printf("\n\nThe data read: (%d bytes, sp = %d)\n",lr,csp);
+    for (i=0; i<lr; i++) {
+        printf("%02X ",buf[i]);
+        if (!((i+1) & 7)) printf("\n");
+    }
+    printf("\n\npress return to exit...");
+    getchar();
+    return(0);
+}
diff --git a/testcode/lib/getsp.s b/testcode/lib/getsp.s
new file mode 100644
index 000000000..61ff02420
--- /dev/null
+++ b/testcode/lib/getsp.s
@@ -0,0 +1,12 @@
+
+	.export _getsp
+	.importzp	sp
+
+.proc	_getsp
+
+	ldx	sp+1
+	lda	sp
+	rts
+
+.endproc
+