From 5ec89f380fa2a3004163d4e1c8da07dd8fc8ec1e Mon Sep 17 00:00:00 2001
From: rearman <rearman@r717.net>
Date: Mon, 13 Apr 2026 16:05:02 -0400
Subject: [PATCH] Replace subtraction with 1-

---
 plc.lisp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plc.lisp b/plc.lisp
index f4ae218..ffd37c1 100644
--- a/plc.lisp
+++ b/plc.lisp
@@ -16,7 +16,7 @@
 
 (defun max-counts (resolution)
   "Calculate the max count for a PLC analog, given card's bit-resolution."
-  (- (^ 2 resolution) 1))
+  (1- (^ 2 resolution)))
 
 (defun volts->counts (vin)
   "Convert a voltage signal to a PLC count.
-- 
2.39.5