sinclair/tsconf.cpp: Changed default ram data to 0x00; cram full init

Author: holub

src/mame/sinclair/tsconf.cpp

@@ -231,6 +231,27 @@ void tsconf_state::machine_reset()
 
 	m_keyboard->write(0xff);
 	while (m_keyboard->read() != 0) { /* invalidate buffer */ }
+
+	const u16 cram_init[0x100] = {
+		0x0000, 0x0008, 0x0010, 0x0018, 0x2000, 0x2008, 0x2010, 0x2018, 0x4000, 0x4008, 0x4010, 0x4018, 0x6000, 0x6008, 0x6010, 0x6018,
+		0x0100, 0x0108, 0x0110, 0x0118, 0x2100, 0x2108, 0x2110, 0x2118, 0x4100, 0x4108, 0x4110, 0x4118, 0x6100, 0x6108, 0x6110, 0x6118,
+		0x0200, 0x0208, 0x0210, 0x0218, 0x2200, 0x2208, 0x2210, 0x2218, 0x4200, 0x4208, 0x4210, 0x4218, 0x6200, 0x6208, 0x6210, 0x6218,
+		0x0300, 0x0308, 0x0310, 0x0318, 0x2300, 0x2308, 0x2310, 0x2318, 0x4300, 0x4308, 0x4310, 0x4318, 0x6300, 0x6308, 0x6310, 0x6318,
+		0x0000, 0x0010, 0x4000, 0x4010, 0x0200, 0x0210, 0x4200, 0x4210, 0x2108, 0x0018, 0x6000, 0x6018, 0x0300, 0x0318, 0x6300, 0x6318,
+		0x0000, 0x0010, 0x4000, 0x4010, 0x0200, 0x0210, 0x4200, 0x4210, 0x0000, 0x0018, 0x6000, 0x6018, 0x0300, 0x0318, 0x6300, 0x6318,
+		0x0000, 0x0010, 0x4000, 0x4010, 0x0200, 0x0210, 0x4200, 0x4210, 0x2108, 0x0018, 0x6000, 0x6018, 0x0300, 0x0318, 0x6300, 0x6318,
+		0x0000, 0x0010, 0x4000, 0x4010, 0x0200, 0x0210, 0x4200, 0x4210, 0x0000, 0x0018, 0x6000, 0x6018, 0x0300, 0x0318, 0x6300, 0x6318,
+		0x0000, 0x0010, 0x4000, 0x4010, 0x0200, 0x0210, 0x4200, 0x4210, 0x2108, 0x0018, 0x6000, 0x6018, 0x0300, 0x0318, 0x6300, 0x6318,
+		0x0000, 0x0010, 0x4000, 0x4010, 0x0200, 0x0210, 0x4200, 0x4210, 0x0000, 0x0018, 0x6000, 0x6018, 0x0300, 0x0318, 0x6300, 0x6318,
+		0x0000, 0x0010, 0x4000, 0x4010, 0x0200, 0x0210, 0x4200, 0x4210, 0x2108, 0x0018, 0x6000, 0x6018, 0x0300, 0x0318, 0x6300, 0x6318,
+		0x0000, 0x0010, 0x4000, 0x4010, 0x0200, 0x0210, 0x4200, 0x4210, 0x0000, 0x0018, 0x6000, 0x6018, 0x0300, 0x0318, 0x6300, 0x6318,
+		0x0000, 0x0010, 0x4000, 0x4010, 0x0200, 0x0210, 0x4200, 0x4210, 0x2108, 0x0018, 0x6000, 0x6018, 0x0300, 0x0318, 0x6300, 0x6318,
+		0x0000, 0x0010, 0x4000, 0x4010, 0x0200, 0x0210, 0x4200, 0x4210, 0x0000, 0x0018, 0x6000, 0x6018, 0x0300, 0x0318, 0x6300, 0x6318,
+		0x0000, 0x0010, 0x4000, 0x4010, 0x0200, 0x0210, 0x4200, 0x4210, 0x2108, 0x0018, 0x6000, 0x6018, 0x0300, 0x0318, 0x6300, 0x6318,
+		0x0000, 0x0010, 0x4000, 0x4010, 0x0200, 0x0210, 0x4200, 0x4210, 0x0000, 0x0018, 0x6000, 0x6018, 0x0300, 0x0318, 0x6300, 0x6318
+	};
+	for (auto i = 0; i < 0x100; i++)
+		cram_write16(i << 1, (cram_init[i] >> 8) | (cram_init[i] << 8)); // init color RAM
 }
 
 void tsconf_state::device_post_load()
@@ -286,7 +307,7 @@ void tsconf_state::tsconf(machine_config &config)
 	ZXBUS_SLOT(config, "zxbus1", 0, "zxbus", zxbus_cards, nullptr);
 	//ZXBUS_SLOT(config, "zxbus2", 0, "zxbus", zxbus_cards, nullptr);
 
-	m_ram->set_default_size("4096K");
+	m_ram->set_default_size("4096K").set_default_value(0x00); // must be random but 0x00 behaves better than 0xff in tested software
 
 	GLUKRS(config, m_glukrs);