M devices/display.c → devices/display.c

@@ -16,9 +16,10 @@ (void)data;
     (void)addr;
 }
 
-void display_input(xyw_byte *data, xyw_byte addr, xyw_byte *error)
+xyw_byte display_input(xyw_byte *data, xyw_byte addr, xyw_byte *error)
 {
     (void)error;
     (void)data;
     (void)addr;
+    return 0;
 }

M examples/window.xyw → examples/window.xyw

@@ -6,9 +6,9 @@ ; metadata
 .string "---" ; metadata marker
 .string "Test Program" ; title
 .string "Just a test program" ; description 
-.string "by H3RALD" ; author
+.string "H3RALD" ; author
 .string "2025-12-18" ; date
-.byte $ff $20 ; preferred width and height
+.byte $ff $1f ; preferred width and height
 .string "---" ; metadata marker
 
 .label init

M xywrun.c → xywrun.c

@@ -270,48 +270,67 @@ // ...
 };
 // clang-format on
 
-char *title, *description, *author, *date;
-xyw_byte width, height;
+char *title = "xyw", *description = 0, *author = 0, *date = 0;
+int width = MAX_WIDTH, height = MAX_HEIGHT;
 
 static void process_metadata()
 {
-    if ((xyw_memory[0x0003] == (0x1C | XYW_MODE_W)) && xyw_memory[0x0004] == '-' && xyw_memory[0x0005] == '-' && xyw_memory[0x0006] == '-')
+    if ((xyw_memory[0x0003] == (0x1C | XYW_MODE_W)) && xyw_memory[0x0004] == '-' && xyw_memory[0x0005] == '-' && xyw_memory[0x0006] == '-' && xyw_memory[0x0007] == 0)
     {
+        xyw_dbg("Metadata found\n");
         // JMPw found followed by ---, read metadata
-        xyw_word p = 0x0007;
+        xyw_word p = 0x0008;
 
         title = (char *)&xyw_memory[p];
         while (p < MEMORY_SIZE && xyw_memory[p] != 0)
             p++;
         if (p >= MEMORY_SIZE)
-            return;
+        {
+            xyw_memory[MEMORY_SIZE - 1] = 0;
+            p = MEMORY_SIZE - 1;
+        }
         p++;
+        xyw_dbg("- title: %s\n", title);
 
         description = (char *)&xyw_memory[p];
         while (p < MEMORY_SIZE && xyw_memory[p] != 0)
             p++;
         if (p >= MEMORY_SIZE)
-            return;
+        {
+            xyw_memory[MEMORY_SIZE - 1] = 0;
+            p = MEMORY_SIZE - 1;
+        }
         p++;
+        xyw_dbg("- description: %s\n", description);
 
         author = (char *)&xyw_memory[p];
         while (p < MEMORY_SIZE && xyw_memory[p] != 0)
             p++;
         if (p >= MEMORY_SIZE)
-            return;
+        {
+            xyw_memory[MEMORY_SIZE - 1] = 0;
+            p = MEMORY_SIZE - 1;
+        }
         p++;
+        xyw_dbg("- author: %s\n", author);
 
         date = (char *)&xyw_memory[p];
         while (p < MEMORY_SIZE && xyw_memory[p] != 0)
-            p++; // skip date string
+            p++;
         if (p >= MEMORY_SIZE)
-            return;
+        {
+            xyw_memory[MEMORY_SIZE - 1] = 0;
+            p = MEMORY_SIZE - 1;
+        }
         p++;
+        xyw_dbg("- date: %s\n", date);
 
         if (p + 1 >= MEMORY_SIZE)
             return;
-        width = xyw_memory[p++];
-        height = xyw_memory[p++];
+        width = xyw_memory[p++] + 1;
+        xyw_dbg("- width: %d\n", width);
+        height = xyw_memory[p++] + 1;
+        xyw_dbg("- height: %d\n", height);
     }
 }
 
@@ -348,8 +367,13 @@ process_metadata();
     // Set direct page to device page by default
     xyw_memory[SYSTEM_PAGE] = 0xff;
     // Initialize fenster
-    uint32_t buf[MAX_WIDTH * MAX_HEIGHT] = {0};
-    struct fenster f = {.title = "xyw", .width = MAX_WIDTH, .height = MAX_HEIGHT, .buf = buf};
+    uint32_t *buf = calloc((size_t)width * (size_t)height, sizeof(uint32_t));
+    if (!buf)
+    {
+        fprintf(stderr, "Error - Could not allocate frame buffer (%dx%d)\n", width, height);
+        return -1;
+    }
+    struct fenster f = {.title = title, .width = width, .height = height, .buf = buf};
     fenster_open(&f);
     while (fenster_loop(&f) == 0 && xyw_memory[SYSTEM_STATE] && *pc < SYSTEM_MEMORY_START)
     {
@@ -397,5 +421,6 @@ // because we are relying on the fact that pc will be incremented at the end of the loop
         (*pc)++;
     }
     fenster_close(&f);
+    free(buf);
     return 0;
 }