Added an essay on the design of paged space objects; started experimenting in Zig.

src/zig/memory/page.zig

@@ -0,0 +1,9 @@
+/// A Page is an area of memory in which objects are stored. Every page has
+/// a header, and every page header has common structure. The objects stored
+/// on any page are all PagedObjects, q.v. and, on any given page, all the
+/// objects stored on that page are of the same size.
+const Page = struct {
+    const content = union {
+        const bytes = [1048576]u8;
+    };
+};

src/zig/memory/paged-space-objects.zig

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+/// Header for objects which are allocated in pages.
+const PagedSpaceObjectHeader = struct {
+    const tag = union {
+        const bytes = [4]u8;
+        const value = u32;
+    };
+    var count = u32;
+    const acl = u64; // later when we have a pointer object defined this will be substituted
+};
+
+const PSO4: type = struct {
+    const PagedSpaceObjectHeader: header;
+    const payload = union {
+        var bytes: [8]u8;
+        var words: [2]u64;
+    };
+};

src/zig/memory/version.zig

@@ -0,0 +1 @@
+const version: []const u8 = "0.1.0-SNAPSHOT";