From 405b4587026e8904b588f43adaa718856ca25c88 Mon Sep 17 00:00:00 2001
From: Sasha Koshka <sashakoshka@tebibyte.media>
Date: Sun, 12 Oct 2025 13:37:50 -0400
Subject: [PATCH] tape: Comment chart for reading tags from hexdumps

---
 tape/tag.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/tape/tag.go b/tape/tag.go
index f4001f2..103f01b 100644
--- a/tape/tag.go
+++ b/tape/tag.go
@@ -18,6 +18,17 @@ type Tag byte; const (
 	CNLimit Tag = 32     // All valid CNs are < CNLimit
 )
 
+// what the first nybble of a tag means:
+//
+//   0-1 : SI 
+//   2-3 : LI 
+//   4-5 : LSI
+//   6-7 : FP 
+//   8-9 : SBA
+//   A-B : LBA
+//   C-D : OTA
+//   E-F : KTV
+
 func (tag Tag) TN() int {
 	return int(tag >> 5)
 }