diff --git a/Makefile b/Makefile
index a4c1c40..96c529b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,30 +1,44 @@
-# Compiles with https://www.brutaldeluxe.fr/products/crossdevtools/merlin/
-#
-ifeq ($(OS),Windows_NT)
-    MERLIN_DIR=C:/opt/Merlin32_v1.0
-    MERLIN_LIB=$(MERLIN_DIR)/Library
-    MERLIN=$(MERLIN_DIR)/Windows/Merlin32
-    RM=del /s
-else
-    MERLIN_DIR=$(HOME)/opt/Merlin32_v1.0
-    MERLIN_LIB=$(MERLIN_DIR)/Library
-    MERLIN=$(MERLIN_DIR)/Linux64/Merlin32
-    RM=rm -f
+# Builds copy command
+
+# Requirements:
+# 1. Gmake must be used.
+# 2. The cc65 compiler must be properly setup.
+
+ifndef CC65_TARGET
+	CC65_TARGET:=apple2enh
 endif
 
-AC=java -jar AppleCommander-ac-1.4.0.jar
-SRC=copy.s
+CC=cl65
+AS=ca65
+OBJS=copy.o  cui.o  fileinfo.o prodos.o
+HDRS=fileinfo.h cui.h prodos.h
+CFLAGS=-O -t $(CC65_TARGET) -DTRACE
+# The -S $6000 makes the start address $6000 so that both hi-res
+# pages are available.
+LDFLAGS=-t $(CC65_TARGET)
 PGM=copy
-VOL=$(PGM)
-DSK=$(PGM).dsk
+DISK_VOL=$(PGM)
+DISK=$(PGM).dsk
+AC=java -jar AppleCommander-ac-1.4.0.jar
 
-$(DSK): $(PGM)
-	$(AC) -pro140 $(DSK) $(VOL)
-	$(AC) -p $(DSK) $(PGM) SYS < $(PGM)
+# Extra stuff
+BASIC_AUX_TYPE=0x0801
+READ_TIME_LOAD_ADDR=0x0260
+SYS_LOAD_ADDR=0x2000
+BIN_LOAD_ADDR=0x0803
 
-$(PGM): $(SRC)
-	$(MERLIN) $(MERLIN_LIB) $(SRC)
+########################################
+
+all: $(DISK)
+
+$(DISK): $(PGM) 
+	$(RM) $(DISK)
+	$(AC) -pro140 $(DISK) $(DISK_VOL)
+	$(AC) -as $(DISK) $(PGM) BIN < $(PGM)
+
+$(PGM): $(OBJS)
+	$(CC) $(LDFLAGS) -o $@ $^
 
 clean:
-	$(RM) $(DSK) $(PGM)
+	$(RM) *.o $(PGM) $(DISK)
 
diff --git a/copy.c b/copy.c
new file mode 100644
index 0000000..0c6a554
--- /dev/null
+++ b/copy.c
@@ -0,0 +1,24 @@
+#include <stdio.h>
+#include <stdbool.h>
+
+#include "fileinfo.h"
+#include "prodos.h"
+#include "cui.h"
+
+char sourceName[PRODOS_PATH_MAX + 1];
+char destName[PRODOS_PATH_MAX + 1];
+FILE *sourceFile;
+FILE *destFile;
+struct FileInfo sourceInfo;
+struct FileInfo destInfo;
+
+void main(void)
+{
+    inputFileName("Source file or directory:", sourceName, sizeof(sourceName), &sourceInfo);
+    inputFileName("Destination file or directory:", destName, sizeof(destName), &destInfo);
+
+    sourceFile = fopen(sourceName, "r");
+    destFile = fopen(destName, "r");
+}
+
+
diff --git a/cui.c b/cui.c
new file mode 100644
index 0000000..516cf44
--- /dev/null
+++ b/cui.c
@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <stdbool.h>
+#include <string.h>     /* strlen */
+
+#include "cui.h"
+#include "fileinfo.h"
+
+static char *readLine(char *line, size_t capacity);
+static void chomp(char *line);
+static bool complete;
+
+void inputFileName(const char *prompt, char *name, size_t capacity, struct FileInfo *f)
+{
+    complete = false;
+
+    while (! complete) {
+        printf(prompt);
+        readLine(name, capacity);
+        initFileInfo(f, name);
+        if (exists(f)) {
+            complete = true;
+        }
+        else {
+            fprintf(stderr, "File '%s' does not exist\n", name);
+        }
+    }
+}
+
+char *readLine(char *line, size_t capacity)
+{
+    char *result;
+
+    if ((result = fgets(line, capacity, stdin)) != NULL)
+        chomp(line);
+    else
+        if (ferror(stdin))
+            perror("stdin");
+
+    return result;
+}
+
+void chomp(char *line)
+{
+    size_t i;
+    char c;
+
+    for (i = strlen(line); i > 0; ) {
+        c = line[--i];
+        if (c == '\r' || c == '\n')
+            line[i] = '\0';
+        else
+            break;
+    }
+}
+
diff --git a/cui.h b/cui.h
new file mode 100644
index 0000000..bce173b
--- /dev/null
+++ b/cui.h
@@ -0,0 +1,7 @@
+#ifndef CUI_H
+#define CUI_H
+
+extern void inputFileName(const char *prompt, char *name, size_t capacity, struct FileInfo *f);
+
+#endif
+
diff --git a/fileinfo.c b/fileinfo.c
new file mode 100644
index 0000000..da2a319
--- /dev/null
+++ b/fileinfo.c
@@ -0,0 +1,27 @@
+#include <apple2_filetype.h>   /* PRODOS_T_DIR */
+#include "fileinfo.h"
+#include "prodos.h"
+
+static struct GetFileInfoParams *infoParams;
+
+void initFileInfo(struct FileInfo *f, const char *name)
+{
+    infoParams = &(f->infoParams);
+    infoParams->param_count = GET_FILE_INFO_PARAM_COUNT;
+    infoParams->pathname = name;
+    f->getFileInfoResult = get_file_info(infoParams);
+}
+
+bool isDir(struct FileInfo *f)
+{
+    return f->infoParams.file_type == PRODOS_T_DIR;
+}
+
+bool exists(struct FileInfo *f)
+{
+    if (f->getFileInfoResult == 0)
+        return true;
+    else
+        return false;
+}
+
diff --git a/fileinfo.h b/fileinfo.h
new file mode 100644
index 0000000..0db63d7
--- /dev/null
+++ b/fileinfo.h
@@ -0,0 +1,18 @@
+#ifndef MY_FILE_H
+#define MY_FILE_H
+
+#include <stdbool.h>
+#include "prodos.h"
+
+struct FileInfo
+{
+    struct GetFileInfoParams infoParams;
+    uint8_t getFileInfoResult;
+};
+
+extern void initFileInfo(struct FileInfo *f, const char *name);
+extern bool isDir(struct FileInfo *f);
+extern bool exists(struct FileInfo *f);
+
+#endif
+
diff --git a/Makefile.onl b/old/Makefile.onl
similarity index 100%
rename from Makefile.onl
rename to old/Makefile.onl
diff --git a/copy.s b/old/copy.s
similarity index 100%
rename from copy.s
rename to old/copy.s
diff --git a/errorhandler.s b/old/errorhandler.s
similarity index 100%
rename from errorhandler.s
rename to old/errorhandler.s
diff --git a/onlinesys.s b/old/mli-online.s
similarity index 100%
rename from onlinesys.s
rename to old/mli-online.s
diff --git a/online.c b/old/online2.c
similarity index 97%
rename from online.c
rename to old/online2.c
index 0e556f3..8cacd42 100644
--- a/online.c
+++ b/old/online2.c
@@ -22,6 +22,7 @@ void online(void)
     arguments.unitNumber = 0; // All units
     arguments.volumes = volumes;
 
+    __asm__(".byte 1");
     __asm__("lda #%b", ON_LINE);
     __asm__("sta %g", l1);
     
diff --git a/prodos.h b/prodos.h
new file mode 100644
index 0000000..5f84bb9
--- /dev/null
+++ b/prodos.h
@@ -0,0 +1,53 @@
+#ifndef PRODOS_MLI_H
+#define PRODOS_MLI_H
+
+#include <stdint.h>
+
+/* PATH_MAX POSIX constant
+   ProDOS has a 64 char prefix that can be combined with partial
+   pathname of 64 characters. This is a total of 128 characters. */
+#define PRODOS_PATH_MAX 128
+
+#define PRODOS_FILE_NAME_MAX 15
+
+#define PRODOS_E_IO_ERROR 0x27
+#define PRODOS_E_INVALID_PATH_SYNTAX 0x40
+#define PRODOS_E_PATH_NOT_FOUND 0x44
+#define PRODOS_E_VOLUME_DIR_NOT_FOUND 0x45
+#define PRODOS_E_FILE_NOT_FOUND 0x46
+#define PRODOS_E_INCOMPAT_FILE_FORMAT 0x4A
+#define PRODOS_E_UNSUP_STORAGE_TYPE 0x4B
+#define PRODOS_E_INVALID_VALUE_IN_PARAM 0x53
+#define PRODOS_E_BITMAP_ADDR_IMPOSSIBLE 0x5A
+
+#define GET_FILE_INFO_PARAM_COUNT 0x0a
+#define ON_LINE_PARAM_COUNT 0x02
+#define ON_LINE_VOLUME_SIZE 256
+
+struct GetFileInfoParams 
+{
+    uint8_t  param_count;   /* in */
+    const char *pathname;   /* in */
+    uint8_t  access;        /* out */
+    uint8_t  file_type;     /* out */
+    uint16_t aux_type;      /* out */
+    uint8_t  storage_type;  /* out */
+    uint16_t blocks_used;   /* out */
+    uint16_t mod_date;      /* out */
+    uint16_t mod_time;      /* out */
+    uint16_t create_date;   /* out */
+    uint16_t create_time;   /* out */
+};
+
+struct OnLineParams 
+{
+    uint8_t param_count;
+    uint8_t unit_num;
+    char data_buffer[ON_LINE_VOLUME_SIZE];
+};
+
+uint8_t on_line(struct OnLineParams *params);
+uint8_t get_file_info(struct GetFileInfoParams *params);
+
+#endif
+
diff --git a/prodos.s b/prodos.s
new file mode 100644
index 0000000..55d156f
--- /dev/null
+++ b/prodos.s
@@ -0,0 +1,33 @@
+        .export     _get_file_info
+    
+
+
+MLI             = $bf00
+GET_FILE_INFO   = $c4
+
+
+
+        .bss
+
+_file_info_addr:    .word   $00
+
+
+
+        .code
+
+; This function is defined as "fastcall" which puts the right-most
+; parameter into A/X and the return value in A/X.
+
+_get_file_info:
+        sta     _file_info_addr
+        stx     _file_info_addr+1
+
+        jsr     MLI
+        .byte   GET_FILE_INFO
+        .word   _file_info_addr
+
+        ; The system call leaves the error status in the Accumulator.
+        ; The "fastcall" calling convention returns the A register,
+        ; which is what we want.
+        rts
+