@@ -1,7 +1,7 @@ 
 CC = gcc
 CFLAGS = -Wall -Wextra -g
-SOURCES = xyw.c xywasm.c xywrun.c devices/console.c devices/clock.c
-OBJS = xyw.o xywasm.o xywrun.o devices/console.o devices/clock.o
+SOURCES = xyw.c xywasm.c xywrun.c devices/console.c devices/clock.c devices/display.c
+OBJS = xyw.o xywasm.o xywrun.o devices/console.o devices/clock.o devices/display.o
 
 # Detect platform for fenster build flags
 UNAME_S := $(shell uname -s 2>/dev/null)
@@ -41,6 +41,9 @@ $(CC) $(CFLAGS) -c devices/console.c -o devices/console.o
 
 devices/clock.o: devices/clock.c xyw.h
 	$(CC) $(CFLAGS) -c devices/clock.c -o devices/clock.o
+
+devices/display.o: devices/display.c xyw.h
+	$(CC) $(CFLAGS) -c devices/display.c -o devices/display.o
 
 clean:
 	rm -f xyw xyw.exe $(OBJS)

@@ -0,0 +1,24 @@ 
+#include <stdio.h>
+#include "../xyw.h"
+
+/* display device */
+#define DISPLAY_WIDTH 0x40
+#define DISPLAY_HEIGHT 0x41
+#define DISPLAY_FILL 0x42
+#define DISPLAY_X 0x43
+#define DISPLAY_Y 0x44
+#define DISPLAY_ON_RENDER 0x45
+
+void display_output(xyw_byte *data, xyw_byte addr, xyw_byte *error)
+{
+    (void)error;
+    (void)data;
+    (void)addr;
+}
+
+void display_input(xyw_byte *data, xyw_byte addr, xyw_byte *error)
+{
+    (void)error;
+    (void)data;
+    (void)addr;
+}

@@ -0,0 +1,4 @@ 
+#include "../xyw.h"
+
+void display_output(xyw_byte *data, xyw_byte addr, xyw_byte *error);
+void display_input(xyw_byte *data, xyw_byte addr, xyw_byte *error);

@@ -1,1 +1,15 @@ 
 .include "devices.xyw"
+; vm will skip the first 3 bytes
+; and try to process metadata wrapped by ---
+init JMPw
+; metadata
+.string "---" ; metadata marker
+.string "Test Program" ; title
+.string "Just a test program" ; description 
+.string "by H3RALD" ; author
+.string "2025-12-18" ; date
+.byte $ff $20 ; preferred width and height
+.string "---" ; metadata marker
+
+.label init
+; actual program starts here 

@@ -5,6 +5,7 @@ #include "xyw.h"
 
 #include "devices/console.h"
 #include "devices/clock.h"
+#include "devices/display.h"
 
 #define MEMORY_SIZE 0xffff
 #define STACK_SIZE 0xff
@@ -261,6 +262,8 @@ // Console device
     {&xyw_memory[0xff10], 0, 0, console_output},
     // Clock device
     {&xyw_memory[0xff20], clock_init, clock_input, 0},
+    // Display device
+    {&xyw_memory[0xff40], 0, display_input, display_output},
     // ...
 };
 // clang-format on