-
-#define T_UNDF 0x00000000 // Undefined Symbol
-#define T_EXT 0x01000000 // External Bit, OR'ed In
-#define T_ABS 0x02000000 // Absolute Symbol
-#define T_TEXT 0x04000000 // TEXT Segment
-#define T_DATA 0x06000000 // DATA Segment
-#define T_BSS 0x08000000 // BSS Segment
+// N.B.: T_GLBL can be ORed with any of T_ABS, T_TEXT, TDATA, or T_BSS!
+// Also, these are really a mashup of a struct, consisting of the
+// following items: type (1 byte), other (1 byte), & descr. (2 bytes).
+// Also, the type is not enough to distinguish between external &
+// common symbols; for this, you need to go to the value field to see
+// what's there (0=external, !0=common).
+
+#define T_UNDF 0x00000000 // Undefined symbol
+#define T_GLBL 0x01000000 // Scoping bit, OR'ed in (global)
+#define T_ABS 0x02000000 // Absolute symbol (equated)
+#define T_TEXT 0x04000000 // TEXT segment
+#define T_DATA 0x06000000 // DATA segment
+#define T_BSS 0x08000000 // BSS segment
+#define T_SEG (T_DATA | T_TEXT | T_BSS) // segment bits