From c473345ca52145c60e28be84558f705bdd9b207b Mon Sep 17 00:00:00 2001
From: Christopher RYU <software-ryucats@disavowed.jp>
Date: Sat, 29 Jul 2023 17:47:11 +0900
Subject: [PATCH] Add CMOS construction notes.

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index 98fa4f9..4fccda3 100644
--- a/README.md
+++ b/README.md
@@ -42,3 +42,5 @@ Firmware images can be built via the Makefile in the firmware subdirectory.  The
 ## Construction notes
 
 * J3 can be omitted if this controller is used with a FloppyEmu
+* All discrete logic ICs (except U15, the 74LS373) can be CMOS (74ACT, 74HCT).  As is unfortunately usual with the Apple ][, U15 must be LS due to timing issues.
+* if CMOS logic is used, then Q1/R6/R6 can be omitted -- the entire logic array can remain powered up at all times.  Connect pads 1 and 3 on the Q1 footprint.