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

@@ -8,7 +8,7 @@ .string "Test Program" ; title
 .string "Just a test program" ; description 
 .string "H3RALD" ; author
 .string "2025-12-18" ; date
-.byte $ff $1f ; preferred width and height
+.byte $ff $ff ; preferred width and height
 .string "---" ; metadata marker
 
 .label init

M xywrun.c → xywrun.c

@@ -322,14 +322,16 @@ {
             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++] + 1;
+        p++;
+        width = (xyw_memory[p] > 0 && xyw_memory[p]) ? xyw_memory[p] + 1 : MAX_WIDTH;
+        p++;
+        height = (xyw_memory[p] > 0 && xyw_memory[p]) ? xyw_memory[p] + 1 : MAX_HEIGHT;
+        p++;
         xyw_dbg("- width: %d\n", width);
-        height = xyw_memory[p++] + 1;
         xyw_dbg("- height: %d\n", height);
     }
 }
@@ -367,21 +369,20 @@ process_metadata();
     // Set direct page to device page by default
     xyw_memory[SYSTEM_PAGE] = 0xff;
     // Initialize fenster
-    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;
-    }
+    uint32_t buf[width * height];
     struct fenster f = {.title = title, .width = width, .height = height, .buf = buf};
     fenster_open(&f);
+    xyw_byte paused = 0;
     while (fenster_loop(&f) == 0 && xyw_memory[SYSTEM_STATE] && *pc < SYSTEM_MEMORY_START)
     {
-        xyw_dbg("PC: %04X -> %02X (%s) [U:%02X|S:%02X|X:%02X|Y:%02X|XW:%04X|YW:%04X]\n", *pc, xyw_memory[*pc], xyw_instructions[xyw_memory[*pc] & 0x1F], *u, *s, *x, *y, *xw, *yw);
+        if (!paused)
+        {
+            xyw_dbg("PC: %04X -> %02X (%s) [U:%02X|S:%02X|X:%02X|Y:%02X|XW:%04X|YW:%04X]\n", *pc, xyw_memory[*pc], xyw_instructions[xyw_memory[*pc] & 0x1F], *u, *s, *x, *y, *xw, *yw);
+        }
         switch (xyw_memory[*pc])
         {
             // clang-format off
-            /* BRK */ case 0x00: return 0; // Halting execution for now
+            /* BRK */ case 0x00: (*pc)--; paused = 1; break; // Stop at current instruction, keep loop running
             /* PSH */ OPC_SR1(0x01, , if (rx||ry) { PUSH(ARG); } else { (*pc)++; PUSH(READ(*pc)); if (w) { (*pc)++; } })
             /* POP */ OPC_SR1(0x02, , if (rx||ry) { SET(POP()); } else { POP(); } );
             /* CLR */ OPC_SR1(0x03, , SET(0));
@@ -421,6 +422,5 @@ // 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;
 }