From a05db5092a09b79559bcbe9f27187a9f803a8a5a Mon Sep 17 00:00:00 2001
From: Thomas Harte <TomHarte@users.noreply.github.com>
Date: Fri, 25 Jun 2021 14:45:54 -0400
Subject: [PATCH] Updated The Enterprise (markdown)

---
 The-Enterprise.md | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/The-Enterprise.md b/The-Enterprise.md
index 48ebc5c..31eb186 100644
--- a/The-Enterprise.md
+++ b/The-Enterprise.md
@@ -79,6 +79,20 @@ The fourth is of variable length, being configurable to either 9, 11, 15 or 17 b
 
 The programmer can opt to provide the noise channel's polynomial counter the tone generators, replacing the 7 bit counter.
 
+Polynomials in use are:
+* 0xc
+* 0x14
+* 0x60
+* 0x110
+* 0x500
+* 0x6000
+* 0x12000
+
+i.e. a potential C-style implementation is:
+
+    output = counter & 1;
+    counter = (counter >> 1) ^ (output ? polynomial_as_listed : 0);
+
 #### Tone Generators
 
 Each channel has a flip flop specifying its current state — high or low.