From d50bacb089662e9cdbfcf0cddd8da01c975648a6 Mon Sep 17 00:00:00 2001
From: Michael <20937441+KMikeeU@users.noreply.github.com>
Date: Tue, 14 Apr 2026 00:04:33 +0200
Subject: [PATCH] fix step validity check

---
 src/tinyriscv.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/tinyriscv.h b/src/tinyriscv.h
index b2df11f..8d1c1e9 100644
--- a/src/tinyriscv.h
+++ b/src/tinyriscv.h
@@ -144,8 +144,9 @@ void tinyriscv_init(tinyriscv_core* core){
 ////////////////////////////////////////////////////////////////////////////////
 
 u8 tinyriscv_valid_step(const tinyriscv_core* core){
+	if(core->pc < tinyriscv_MEM_OFFSET) return 0;
+	if(core->pc + 3 >= core->mem_size + tinyriscv_MEM_OFFSET) return 0;
 	if(!MEM(32, core->mem, core->pc)) return 0;
-	if(core->pc >= core->mem_size + tinyriscv_MEM_OFFSET) return 0;
 	return 1;
 }