From c84421a2ada0880cad7bf661dddc66e32cee735c Mon Sep 17 00:00:00 2001
From: folkert van heusden <mail@vanheusden.com>
Date: Tue, 15 Mar 2022 23:04:21 +0100
Subject: [PATCH] fix memory leak

---
 ESP32/main.ino | 15 ++++++++++++---
 bus.cpp        |  4 +++-
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/ESP32/main.ino b/ESP32/main.ino
index 40d011d..de7cbbe 100644
--- a/ESP32/main.ino
+++ b/ESP32/main.ino
@@ -9,8 +9,8 @@
 #include "utils.h"
 #include "error.h"
 
-bus *b = new bus();
-cpu *c = new cpu(b);
+bus *b = nullptr;
+cpu *c = nullptr;
 tty *tty_ = nullptr;
 
 uint16_t loadbin(bus *const b)
@@ -222,6 +222,12 @@ void setup() {
 	Serial.print(F("Size of int: "));
 	Serial.println(sizeof(int));
 
+	Serial.print(F("CPU clock frequency: "));
+	Serial.println(getCpuFrequencyMhz());
+
+	Serial.print(F("Free RAM before init: "));
+	Serial.println(ESP.getFreeHeap());
+
 	Serial.println(F("Init bus"));
 	b = new bus();
 
@@ -242,6 +248,9 @@ void setup() {
 	exec_addr = loadbin(b);
 	c->setRegister(7, exec_addr);
 
+	Serial.print(F("Free RAM after init: "));
+	Serial.println(ESP.getFreeHeap());
+
 	pinMode(LED_BUILTIN, OUTPUT);
 
 	Serial.println(F("Press <enter> to start"));
@@ -280,7 +289,7 @@ void loop() {
 		Serial.println(F(" *** EMULATION STOPPED *** "));
 		Serial.print(F("Instructions per second: "));
 		Serial.println(icount * 1000.0 / (millis() - start_ts));
-		delay(1000);
+		delay(3000);
 		Serial.println(F(" *** EMULATION RESTARTING *** "));
 
 		c->setRegister(7, exec_addr);
diff --git a/bus.cpp b/bus.cpp
index 42c5d1c..746ce95 100644
--- a/bus.cpp
+++ b/bus.cpp
@@ -16,7 +16,9 @@
 bus::bus() : c(nullptr), tm11(nullptr), rk05_(nullptr), rx02_(nullptr), tty_(nullptr)
 {
 #if defined(ESP32)
-	int n = 8;
+	// ESP32 goes in a crash-loop when allocating 128kB
+	// see also https://github.com/espressif/esp-idf/issues/1934
+	int n = 14;
 #else
 	int n = 16;
 #endif