From 2ad6d46b5d4f4975ac41e2f0414c16330b0a3e0c Mon Sep 17 00:00:00 2001
From: n loewen <nick@nloewen.com>
Date: Thu, 24 Aug 2023 08:18:45 +0100
Subject: [PATCH] (docs) readme - Change memory map to include initial IP +
 not-yet-implemented ROM with pointer-to-initial-IP

---
 readme.md | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/readme.md b/readme.md
index a41b7c3..62572e7 100644
--- a/readme.md
+++ b/readme.md
@@ -115,7 +115,9 @@ Put differently: it starts executing instructions at the address contained in `$
 - `1A   ` - pointer to display memory
 - `1B   ` - keypad: value of latest key pressed
 - `1C   ` - reserved for future use (bank switching flag)
-- `1D-FF` - free
+- `1D   ` - initial IP
+- `1D-FE` - free
+- `FF   ` - ROM (unwriteable) pointer to initial IP (not yet implemented)
 
 ## Peripherals