From 3fd770ab53159d0519a8c9142fc93b9d4062d54d Mon Sep 17 00:00:00 2001
From: n loewen <n@nloewen.com>
Date: Sat, 8 Mar 2025 12:26:35 +0000
Subject: [PATCH] Add a little comment explaining how keypad entry workds

---
 src/cpu.py | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/cpu.py b/src/cpu.py
index 6152e3a..da4ce9d 100644
--- a/src/cpu.py
+++ b/src/cpu.py
@@ -8,6 +8,17 @@ from adafruit_display_text import label
 import keypad
 from digitalio import DigitalInOut, Direction, Pull
 
+# TO USE KEYPAD TO MANIPULATE DATA:
+#
+# A button: run/halt
+# B button: when halted, toggles address/data entry
+# Right button: when halted, single-steps
+#
+# Address entry: press the two digits for the address. It is entered immediately (there's no "enter" key)
+# Data entry: likewise. After you press the second digit, it will automatically go to the next address.
+
+
+
 # to list board features: print(board.__dir__)
 
 btna = DigitalInOut(board.BTNA)