From c167cb34f229802b34f65ba958c7d28a6ba898ad Mon Sep 17 00:00:00 2001
From: MURAOKA Taro <koron.kaoriya@gmail.com>
Date: Thu, 18 Apr 2024 12:05:03 +0900
Subject: [PATCH] expand "RET" stack operations

---
 op_callret.go | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/op_callret.go b/op_callret.go
index 2b9585e..47e3de2 100644
--- a/op_callret.go
+++ b/op_callret.go
@@ -18,8 +18,13 @@ func oopRETN(cpu *CPU) {
 }
 
 func oopRET(cpu *CPU) {
-	cpu.PC = cpu.readU16(cpu.SP)
-	cpu.SP += 2
+	//cpu.PC = cpu.readU16(cpu.SP)
+	//cpu.SP += 2
+	l := cpu.Memory.Get(cpu.SP)
+	cpu.SP++
+	h := cpu.Memory.Get(cpu.SP)
+	cpu.SP++
+	cpu.PC= (uint16(h) << 8) | uint16(l)
 }
 
 //////////////////////////////////////////////////////////////////////////////