Got most of the new memory architecture roughed out.

src/c/payloads/nlambda.h

@@ -0,0 +1,22 @@
+/**
+ *  payloads/nlambda.h
+ *
+ *  A nlambda cell.
+ *
+ *  (c) 2026 Simon Brooke <simon@journeyman.cc>
+ *  Licensed under GPL version 2.0, or, at your option, any later version.
+ */
+
+#ifndef __psse_payloads_nlambda_h
+#define __psse_payloads_nlambda_h
+
+#include "memory/pointer.h"
+
+/**
+ * An ordinary nlambda cell:
+ */
+#define CONSTAG     "CNS"
+
+/* nlambda shares a payload with lambda */
+
+#endif