From a7cb46cac7575875dd38e7d3135fd54d78598523 Mon Sep 17 00:00:00 2001
From: uvok
Date: Wed, 21 Jan 2026 20:17:44 +0100
Subject: Explain separate PC++ state

need to get correct next state, once
INS is loaded.
---
 eater_cpu/readme.txt | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'eater_cpu/readme.txt')

diff --git a/eater_cpu/readme.txt b/eater_cpu/readme.txt
index aa72328..44fe1b1 100644
--- a/eater_cpu/readme.txt
+++ b/eater_cpu/readme.txt
@@ -40,8 +40,14 @@ operation
    Increment PC.
    a) PC out -> MAR
    (PC_to_bus) + (bus_to_MAR) + (clk)
-   b) MEM -> INS, PC++
-   (RAM_to_bus) + (bus_to_INS) + (PC_count_en) + (clk)
+   b) MEM -> INS
+   (RAM_to_bus) + (bus_to_INS) + (clk)
+   c) PC++
+   (PC_count_en) + (clk)
+
+   NOTE:
+   Yes, I know Ben Eaters computer combines b and c.
+   See eater_types for details.
 
 2. Decode and execute instruction.
 
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