From 87a44f2d3a772c0f764eb350f9fa5ce86932eeb7 Mon Sep 17 00:00:00 2001
From: d0p1 <contact@d0p1.eu>
Date: Sat, 24 Feb 2024 21:43:08 +0100
Subject: [PATCH] Update isa.org add D register

---
 doc/isa.org | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/doc/isa.org b/doc/isa.org
index a81d714..7a36b8e 100644
--- a/doc/isa.org
+++ b/doc/isa.org
@@ -4,10 +4,11 @@
 ** Registers
 
 - PC :: Program counter (32bit)
-- AC :: Accumulator (32bit)
-- X  :: X register (32bit)
-- Y  :: Y register (32bit)
-- SR :: status register (32bit)
+- A  :: Accumulator (32bit)
+- D  :: Direct register (32bit)
+- X  :: X index register (32bit)
+- Y  :: Y index register (32bit)
+- SR :: status register (8bit)
 - SP :: stack pointer (32bit)
 
 Status register flags