diff --git a/bios/main.s b/bios/main.s
new file mode 100644
index 0000000..eae3f92
--- /dev/null
+++ b/bios/main.s
@@ -0,0 +1,18 @@
+.sect .text
+.sect .rom
+.sect .data
+.sect .bss
+
+.sect .bss
+STACKSIZE = 512
+.comm stack, STACKSIZE
+
+.sect .text
+_start:
+	sei	! disable interrupt
+
+	! setup stack
+	ldy.l #stack + STACKSIZE
+	txs
+
+	
diff --git a/configure.ac b/configure.ac
index 7afb2c2..392daac 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,8 +1,18 @@
 AC_INIT([65oo2], [1.0])
 
+AC_CANONICAL_HOST
+
 AM_INIT_AUTOMAKE([foreign subdir-objects])
 
-AC_CANONICAL_HOST
+AC_CONFIG_HEADERS([config.h])
+
+case "$host_os" in
+	cygwin*|mingw*)
+		OS_TYPE=windows;;
+	*)
+		OS_TYPE=unknown;;
+esac
+AM_CONDITIONAL([OS_WINDOWS], test "$OS_TYPE" = "windows")
 
 AC_LANG(C)
 AC_PROG_CC
@@ -12,10 +22,41 @@ AC_PROG_RANLIB
 AM_PROG_AS
 AM_PROG_AR
 AM_PROG_CC_C_O
+PKG_PROG_PKG_CONFIG
+AC_CHECK_TOOLS(WINDRES, [windres], :)
+
+AC_ARG_ENABLE([ata-vga],
+	[AS_HELP_STRING([--enable-ata-vga], [enable VGA (default=yes)])],
+	[WANT_ATA_VGA=$enableval], [WANT_ATA_VGA=yes])
+AC_ARG_ENABLE([ata-ethernet],
+	[AS_HELP_STRING([--enable-ata-ethernet], [enable ethernet device (default=yes)])],
+	[WANT_ATA_ETHERNET=$enableval], [WANT_ATA_ETHERNET=yes])
+
+AC_ARG_ENABLE(mmu,
+	[AS_HELP_STRING([--enable-mmu], [enable MMU (default=yes)])],
+	[WANT_MMU=$enableval], [WANT_MMU=yes])
+AC_ARG_ENABLE(jit,
+	[AS_HELP_STRING([--enable-jit], [enable JIT compiler (default=no)])],
+	[WANT_JIT=$enableval], [WANT_JIT=no])
 
 AC_CHECK_INCLUDES_DEFAULT
 AC_C_CONST
 
+AM_CONDITIONAL([USE_ATA_VGA], test "$WANT_ATA_VGA" = "yes")
+if test "$WANT_ATA_VGA" = "yes"; then
+   AC_DEFINE([ATA_VGA], [1], [Enable VGA device])
+   PKG_CHECK_MODULES([SDL2], [sdl2])
+
+fi
+
+AM_CONDITIONAL([USE_ATA_ETHERNET], test "$WANT_ATA_ETHERNET" = "yes")
+if test "$WANT_ATA_ETHERNET" = "yes"; then
+   AC_DEFINE([ATA_ETERNET], [1], [Enable Ethernet device])
+fi
+
+AM_CONDITIONAL([USE_MMU], test "$WANT_MMU" = "yes")
+AM_CONDITIONAL([USE_JIT], test "$WANT_JIT" = "yes")
+
 AC_CONFIG_FILES([
         Makefile
         lib/Makefile
diff --git a/disas/Makefile.am b/disas/Makefile.am
index 854cd05..ef68a59 100644
--- a/disas/Makefile.am
+++ b/disas/Makefile.am
@@ -1,5 +1,7 @@
+include res/Makefrag.am
+
 bin_PROGRAMS = disas
 
 disas_SOURCES = main.c
 disas_CFLAGS =-I$(top_srcdir)
-disas_LDADD = ../lib/lib65oo2.a
\ No newline at end of file
+disas_LDADD = ../lib/lib65oo2.a  $(RES)
\ No newline at end of file
diff --git a/disas/main.c b/disas/main.c
index 4b41cf7..89314e3 100644
--- a/disas/main.c
+++ b/disas/main.c
@@ -90,35 +90,67 @@ fatal(const char *str, ...)
   exit(EXIT_FAILURE);
 }
 
+void
+decode_target_suffix(uint8_t attr)
+{
+  fprintf(output, ".");
+  if (IS_TARGET_ZEXT(attr))
+    {
+      fprintf(output, "U");
+    }
+
+  switch (GET_TARGET_SIZE(attr))
+    {
+    case SIZE_BYTE:
+      fprintf(output, "B");
+      break;
+    case SIZE_WORD:
+      fprintf(output, "W");
+      break;
+    case SIZE_LONG:
+      fprintf(output, "L");
+      break;
+    }
+}
+
+void
+decode_address(uint8_t attr)
+{
+    switch (GET_ADDRESS_SIZE(attr))
+    {
+    case SIZE_BYTE:
+      fprintf(output, " %%%X", readu8());
+      break;
+    case SIZE_WORD:
+      fprintf(output, " %%%hX", readu16());
+      break;
+    case SIZE_LONG:
+      fprintf(output, " %%%X", readu32());
+      break;
+    default:
+      break;
+    }
+}
+
 void
 decode_imm(uint8_t opcode)
 {
   uint8_t attr;
 
   attr = readu8();
-  if ((attr & 0x3) == 0x3)
-    {
-      fprintf(output, "???\n");
-      return;
-    }
 
-  fprintf(output, "%s.", opcode_str[opcode]);
-
-  if (attr & 0x4)
+  fprintf(output, "%s", opcode_str[opcode]);
+  decode_target_suffix(attr);
+  switch (GET_TARGET_SIZE(attr))
     {
-      fprintf(output, "U");
-    }
-
-  switch (attr & 0x3)
-    {
-    case 0x0:
-      fprintf(output, "B #$%X\n", readu8());
+    case SIZE_BYTE:
+      fprintf(output, " #$%X\n", readu8());
       break;
-    case 0x1:
-      fprintf(output, "W #$%hX\n", readu16());
+    case SIZE_WORD:
+      fprintf(output, " #$%hX\n", readu16());
       break;
-    case 0x2:
-      fprintf(output, "L #$%X\n", readu32());
+    case SIZE_LONG:
+      fprintf(output, " #$%X\n", readu32());
       break;
     default:
       break;
@@ -130,8 +162,32 @@ decode_ind(uint8_t opcode)
 {
   uint8_t attr;
 
+  fprintf(output, "%s", opcode_str[opcode]);
   attr = readu8();
-  (void)attr;
+  if (opcode != OP_JMP_ind)
+    {
+      decode_target_suffix(attr);
+    }
+  if (opcode_addr[opcode] & (OP_ADDR_X | OP_ADDR_Y))
+    {
+      fprintf(output, " (");
+    }
+  else
+    {
+      fprintf(output, " ");
+    }
+
+  decode_address(attr);
+
+  if (opcode_addr[opcode] & OP_ADDR_X)
+    {
+      fprintf(output, ", X)");
+    }
+  else if (opcode_addr[opcode] & OP_ADDR_Y)
+    {
+      fprintf(output, "), Y");
+    }
+  fprintf(output, "\n");
 }
 
 void
@@ -139,8 +195,24 @@ decode_abs(uint8_t opcode)
 {
   uint8_t attr;
 
+  fprintf(output, "%s", opcode_str[opcode]);
   attr = readu8();
-  (void)attr;
+  if (opcode != OP_JSR_abs
+      || opcode != OP_JMP_abs)
+    {
+      decode_target_suffix(attr);
+    }
+  decode_address(attr);
+
+  if (opcode_addr[opcode] & OP_ADDR_X)
+    {
+      fprintf(output, ", X");
+    }
+  else if (opcode_addr[opcode] & OP_ADDR_Y)
+    {
+      fprintf(output, ", Y");
+    }
+  fprintf(output, "\n");
 }
 
 void
diff --git a/disas/res/Makefrag.am b/disas/res/Makefrag.am
new file mode 100644
index 0000000..56c68fe
--- /dev/null
+++ b/disas/res/Makefrag.am
@@ -0,0 +1,8 @@
+if OS_WINDOWS
+RES = windows.$(OBJEXT)
+else
+RES = 
+endif
+
+windows.$(OBJEXT): res/windows.rc
+	$(WINDRES) $< $@
diff --git a/disas/res/disas.ico b/disas/res/disas.ico
new file mode 100644
index 0000000..3d5d5ed
Binary files /dev/null and b/disas/res/disas.ico differ
diff --git a/disas/res/disas.png b/disas/res/disas.png
new file mode 100644
index 0000000..9454e1a
Binary files /dev/null and b/disas/res/disas.png differ
diff --git a/disas/res/windows.rc b/disas/res/windows.rc
new file mode 100644
index 0000000..d23b204
--- /dev/null
+++ b/disas/res/windows.rc
@@ -0,0 +1 @@
+1 ICON "disas.ico"
diff --git a/lib/op.h b/lib/op.h
index 48f52b3..33fee5f 100644
--- a/lib/op.h
+++ b/lib/op.h
@@ -39,6 +39,30 @@
 # define OP_BMI_rel   0x30
 # define OP_AND_ind_y 0x31
 
+# define OP_JMP_abs   0x4C
+# define OP_JMP_ind   0x6C
+
+/*
+ * size encoding
+ */
+# define SIZE_BYTE           0x0
+# define SIZE_WORD           0x1
+# define SIZE_LONG           0x2
+
+# define TARGET_ZEXT         (1 << 2)
+# define TARGET_SIZE_BYTE    SIZE_BYTE
+# define TARGET_SIZE_WORD    SIZE_WORD
+# define TARGET_SIZE_LONG    SIZE_LONG
+
+# define ADDRESS_SIZE_BYTE   (SIZE_BYTE << 3)
+# define ADDRESS_SIZE_WORD   (SIZE_WORD << 3)
+# define ADDRESS_SIZE_LONG   (SIZE_LONG << 3)
+
+# define GET_TARGET_SIZE(x)  ((x) & 0x03)
+# define GET_ADDRESS_SIZE(x) (((x) >> 3) & 0x03)
+# define IS_TARGET_ZEXT(x)   ((x) & TARGET_ZEXT)
+
+
 extern const uint8_t opcode_addr[];
 extern const char *opcode_str[];
 
diff --git a/vm/Makefile.am b/vm/Makefile.am
index 4568631..cb2a849 100644
--- a/vm/Makefile.am
+++ b/vm/Makefile.am
@@ -1,5 +1,11 @@
+include jit/Makefrag.am
+include ata/Makefrag.am
+include res/Makefrag.am
+
+noinst_LIBRARIES = $(LIBJIT) $(LIB_ATA)
+
 bin_PROGRAMS = vm
 
-vm_SOURCES = main.c jit.c x64/x64.S
+vm_SOURCES = main.c
 vm_CFLAGS =-I$(top_srcdir)
-vm_LDADD = ../lib/lib65oo2.a
+vm_LDADD = ../lib/lib65oo2.a $(LIBJIT) $(LIB_ATA) $(RES)
diff --git a/vm/ata/Makefrag.am b/vm/ata/Makefrag.am
new file mode 100644
index 0000000..b4f3817
--- /dev/null
+++ b/vm/ata/Makefrag.am
@@ -0,0 +1,7 @@
+LIB_ATA = libata.a
+
+libata_a_SOURCES = ata/ata.c ata/rtc.c
+
+if USE_ATA_VGA
+libata_a_SOURCES += ata/vga.c
+endif
diff --git a/vm/ata/ata.c b/vm/ata/ata.c
new file mode 100644
index 0000000..a0a9b1a
--- /dev/null
+++ b/vm/ata/ata.c
@@ -0,0 +1,27 @@
+#include "ata.h"
+#include "config.h"
+
+extern AtaDevice rtc_dev;
+#ifdef ATA_ETHERNET
+extern AtaDevice ethernet_dev;
+#endif /* ATA_ETHERNET */
+#ifdef ATA_VGA
+extern AtaDevice vga_dev;
+#endif /* ATA_VGA */
+
+
+AtaDevice *devices[] = {
+    &rtc_dev,
+#ifdef ATA_ETHERNET
+    &ethernet_dev,
+#endif /* ATA_ETHERNET */
+#ifdef ATA_VGA
+    &vga_dev,
+#endif /* ATA_VGA */
+    NULL
+};
+
+void
+ata_bus_initialize(void)
+{
+}
diff --git a/vm/ata/ata.h b/vm/ata/ata.h
new file mode 100644
index 0000000..4858c94
--- /dev/null
+++ b/vm/ata/ata.h
@@ -0,0 +1,19 @@
+#ifndef VM_ATA_ATA_H
+# define VM_ATA_ATA_H 1
+
+# include <stdint.h>
+
+typedef void (*IoWrite)(uint8_t offset, uint8_t data);
+typedef uint8_t (*IoRead)(uint8_t offset);
+
+typedef struct
+{
+  char const *name;
+  uint16_t start;
+  uint16_t end;
+  void *state;
+  IoWrite io_write;
+  IoRead  io_read;
+} AtaDevice;
+
+#endif /* VM_ATA_ATA_H */
diff --git a/vm/ata/ethernet.c b/vm/ata/ethernet.c
new file mode 100644
index 0000000..233a1bd
--- /dev/null
+++ b/vm/ata/ethernet.c
@@ -0,0 +1,14 @@
+#include "isa.h"
+
+static const uint8_t mac_addr[6] = {
+  0x53, 0x54, 0x41, 0x4C, 0x49, 0x4E
+};
+
+AtaDevice ethernet_dev = {
+  "TinyEthernet",
+  0x360,
+  0x36F,
+  NULL,
+  NULL,
+  NULL
+};
diff --git a/vm/ata/rtc.c b/vm/ata/rtc.c
new file mode 100644
index 0000000..c88747c
--- /dev/null
+++ b/vm/ata/rtc.c
@@ -0,0 +1,45 @@
+#include <time.h>
+#include "ata.h"
+
+#define REG_SECS    0x00
+#define REG_MINS    0x00
+#define REG_HOURS   0x00
+#define REG_WKDAY   0x06
+#define REG_DAY     0x07
+#define REG_YEAR    0x09
+#define REG_CENTURY 0x032
+#define REG_STATUSA 0x0A
+#define REG_STATUSB 0x0B
+
+static uint8_t current_reg = 0x00;
+
+void
+rtc_write(uint8_t addr, uint8_t value)
+{
+  if (addr == 0)
+    {
+      current_reg = value;
+    }
+}
+
+uint8_t
+rtc_read(uint8_t addr)
+{
+  time_t time;
+  struct tm tm;
+
+  localtime(&time);
+
+  (void)time;
+  (void)tm;
+
+  return (0x00);
+}
+
+AtaDevice rtc_dev = {
+  "RTC",
+  0x070,
+  0x071,
+  NULL,
+  NULL
+};
diff --git a/vm/ata/serial.c b/vm/ata/serial.c
new file mode 100644
index 0000000..3bfee6c
--- /dev/null
+++ b/vm/ata/serial.c
@@ -0,0 +1,25 @@
+#include "ata.h"
+
+AtaDevice com3_dev = {
+  "COM3",
+  0x3E0,
+  0x3EF,
+  NULL,
+  NULL
+};
+
+AtaDevice com2_dev = {
+  "COM2",
+  0x2F8,
+  0x2FF,
+  NULL,
+  NULL,
+};
+
+AtaDevice com1_dev = {
+  "COM1",
+  0x3F8,
+  0x3FF,
+  NULL,
+  NULL,
+};
diff --git a/vm/ata/vga.c b/vm/ata/vga.c
new file mode 100644
index 0000000..258d1af
--- /dev/null
+++ b/vm/ata/vga.c
@@ -0,0 +1,22 @@
+#include "ata.h"
+
+enum VGA_REG {
+  REG_CRTC_ADDR,
+  REG_CRTC_DATA,
+  REG_INPUT_STATUS1,
+  REG_FEAT_CTRL,
+  REG_ATTR_ADDR,
+  REG_ATTR_DATA,
+};
+
+enum VGA_CRTC {
+    XXX
+};
+
+AtaDevice vga_dev = {
+  "TinyVGA",
+  0x3C0,
+  0x3CF,
+  NULL,
+  NULL,
+};
diff --git a/vm/bus.c b/vm/bus.c
new file mode 100644
index 0000000..ce1a0d5
--- /dev/null
+++ b/vm/bus.c
@@ -0,0 +1,19 @@
+void
+bus_initialize(void)
+{
+}
+
+void
+bus_read(void)
+{
+}
+
+void
+bus_write(void)
+{
+}
+
+void
+bus_reset(void)
+{
+}
diff --git a/vm/jit/Makefrag.am b/vm/jit/Makefrag.am
new file mode 100644
index 0000000..98c4d97
--- /dev/null
+++ b/vm/jit/Makefrag.am
@@ -0,0 +1,7 @@
+if USE_JIT
+LIBJIT = libjit.a
+else
+LIBJIT = 
+endif
+
+libjit_a_SOURCES = jit/jit.c jit/x64/x64.S
diff --git a/vm/jit.c b/vm/jit/jit.c
similarity index 100%
rename from vm/jit.c
rename to vm/jit/jit.c
diff --git a/vm/jit.h b/vm/jit/jit.h
similarity index 100%
rename from vm/jit.h
rename to vm/jit/jit.h
diff --git a/vm/x64/register.h b/vm/jit/x64/register.h
similarity index 100%
rename from vm/x64/register.h
rename to vm/jit/x64/register.h
diff --git a/vm/x64/x64.S b/vm/jit/x64/x64.S
similarity index 100%
rename from vm/x64/x64.S
rename to vm/jit/x64/x64.S
diff --git a/vm/main.c b/vm/main.c
index abcb908..26a92f3 100644
--- a/vm/main.c
+++ b/vm/main.c
@@ -1,8 +1,18 @@
 #include <stdlib.h>
 #include <stdio.h>
 
+static const char *prg_name;
+
+void
+usage(void)
+{
+  printf("Usage: %s [-hV] [-b bios]\n");
+}
+
 int
 main(int argc, char **argv)
 {
+  prg_name =  argv[0];
+
   return (EXIT_SUCCESS);
 }
diff --git a/vm/res/Makefrag.am b/vm/res/Makefrag.am
new file mode 100644
index 0000000..56c68fe
--- /dev/null
+++ b/vm/res/Makefrag.am
@@ -0,0 +1,8 @@
+if OS_WINDOWS
+RES = windows.$(OBJEXT)
+else
+RES = 
+endif
+
+windows.$(OBJEXT): res/windows.rc
+	$(WINDRES) $< $@
diff --git a/vm/res/vm.ico b/vm/res/vm.ico
new file mode 100644
index 0000000..ee39312
Binary files /dev/null and b/vm/res/vm.ico differ
diff --git a/vm/res/vm.png b/vm/res/vm.png
new file mode 100644
index 0000000..a94c78c
Binary files /dev/null and b/vm/res/vm.png differ
diff --git a/vm/res/windows.rc b/vm/res/windows.rc
new file mode 100644
index 0000000..e3f43de
--- /dev/null
+++ b/vm/res/windows.rc
@@ -0,0 +1 @@
+1 ICON "vm.ico"