From 8c0b7ea39d57cb6c80cf66207291837d95c71940 Mon Sep 17 00:00:00 2001
From: Julian Blake Kongslie
Date: Mon, 5 Apr 2021 13:32:41 -0700
Subject: Change the null byte from no-op to halt.

---
 hdl/top.sv | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'hdl')

diff --git a/hdl/top.sv b/hdl/top.sv
index 54cfdc5..a1cdbf7 100644
--- a/hdl/top.sv
+++ b/hdl/top.sv
@@ -133,7 +133,7 @@ always_ff @(posedge clk) begin
                             if (operand[1]) ++acc;
                             if (operand[2]) --acc;
                             if (operand[6]) state = MEMORY;
-                            if (operand[7]) state = HALT;
+                            if (operand == 0) state = HALT;
                         end
                         'h1: acc = sign_extended_operand;
                         'h2, 'h3: begin
-- 
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