Got most of the new memory architecture roughed out.

src/c/memory/header.h

@@ -0,0 +1,40 @@
+/**
+ *  memory/header.h
+ *
+ *  Header for all page space objects
+ *
+ *  (c) 2026 Simon Brooke <simon@journeyman.cc>
+ *  Licensed under GPL version 2.0, or, at your option, any later version.
+ */
+
+#ifndef __psse_memory_header_h
+#define __psse_memory_header_h
+
+#include <stdint.h>
+
+#define TAGLENGTH 3
+
+/**
+ * @brief Header for all paged space objects.
+ * 
+ */
+struct pso_header {
+    union {
+        /** the tag (type) of this cell,
+         * considered as bytes */
+        struct {
+            /** mnemonic for this type; */
+            char mnemonic[TAGLENGTH];
+            /** sizetag for this object */
+            uint8_t sizetag;
+        } tag;
+        /** the tag considered as a number */
+        uint32_t value;
+    } tag;
+    /** the count of the number of references to this cell */
+    uint32_t count;
+    /** cons pointer to the access control list of this cell */
+    struct cons_pointer access;
+};
+
+#endif