Lots more code written, and I think most of it's OK; but it doesn't compile yet.

src/c/memory/node.c

@@ -0,0 +1,55 @@
+/**
+ *  memory/node.c
+ *
+ *  Top level data about the actual node on which this memory system sits.
+ *  May not belong in `memory`. 
+ *
+ *  (c) 2026 Simon Brooke <simon@journeyman.cc>
+ *  Licensed under GPL version 2.0, or, at your option, any later version.
+ */
+
+#include "memory/memory.h"
+#include "memory/pointer.h"
+
+/**
+ * @brief Flag to prevent the node being initialised more than once.
+ * 
+ */
+bool node_initialised = false;
+
+/**
+ * @brief The index of this node in the hypercube.
+ * 
+ */
+uint32_t node_index = 0;
+
+/**
+ * @brief The canonical `nil` pointer
+ * 
+ */
+struct pso_pointer nil = struct pso_pointer{ 0, 0, 0};
+
+/**
+ * @brief the canonical `t` (true) pointer.
+ * 
+ */
+struct pso_pointer t = struct pso_pointer{ 0, 0, 1};
+
+/**
+ * @brief Set up the basic informetion about this node
+ * 
+ * @param index 
+ * @return struct pso_pointer 
+ */
+struct pso_pointer initialise_node( uint32_t index) {
+    node_index = index;
+    nil = pso_pointer{ index, 0, 0};
+    t = pso_pointer( index, 0, 1);
+    pso_pointer result = initialise_memory(index);
+
+    if ( eq( result, t)) {
+        result = initialise_environment();
+    }
+
+    return result;
+}