jazz: diagnostic led (nw)

src/mame/drivers/jazz.cpp

@@ -60,11 +60,14 @@
 
 #include "debugger.h"
 
+#include "jazz.lh"
+
 #define VERBOSE 0
 #include "logmacro.h"
 
 void jazz_state::machine_start()
 {
+	m_led.resolve();
 }
 
 void jazz_state::machine_reset()
@@ -124,13 +127,7 @@ void jazz_state::jazz_common_map(address_map &map)
 	//map(0x8000d000, 0x8000dfff).noprw(); // dummy dma device?
 	map(0x8000d600, 0x8000d607).nopw();
 
-	map(0x8000f000, 0x8000f007).lrw8(
-			NAME([this] () { return m_led; }),
-			NAME([this] (u8 data)
-			{
-				logerror("led 0x%02x (%s)\n", data, machine().describe_context());
-				m_led = data;
-			})).umask64(0xff);
+	map(0x8000f000, 0x8000f007).w(FUNC(jazz_state::led_w)).umask64(0xff);
 
 	// lots of byte data written to 800
 	//map(0x800e0000, 0x800fffff).m() // dram config
@@ -312,6 +309,35 @@ void jazz_state::jazz(machine_config &config)
 	m_isp->out_spkr_cb().set(m_buzzer, FUNC(speaker_sound_device::level_w));
 
 	// TODO: 4 EISA slots
+
+	config.set_default_layout(layout_jazz);
+}
+
+void jazz_state::led_w(u8 data)
+{
+	// 7-segment diagnostic led
+	static u8 const patterns[16] =
+	{
+			  // test      output
+		0x3f, // mct-adr     0
+		0x06, // network     1
+		0x5b, // scsi        2
+		0x4f, // floppy      3
+		0x66, // isp/rtc     4
+		0x6d, // keyboard    5
+		0x7d, // serial      6
+		0x07, // nvram       7
+		0x7f, //             8?
+		0x6f, // video       9
+		0x77, // memory      A
+		0x40, //             -
+		0x39, // flash       C
+		0x00, //           (blank)
+		0x79, // cpu         E
+		0x71, //             F?
+	};
+
+	m_led = patterns[data & 0xf] | (BIT(data, 4) ? 0x80 : 0);
 }
 
 void jazz_state::mmr4000be(machine_config &config)

src/mame/includes/jazz.h

@@ -66,6 +66,7 @@ public:
 		, m_lpt(*this, "lpt")
 		, m_isp(*this, "isp")
 		, m_buzzer(*this, "buzzer")
+		, m_led(*this, "led0")
 	{
 	}
 
@@ -80,6 +81,8 @@ protected:
 	// machine config
 	void jazz(machine_config &config);
 
+	void led_w(u8 data);
+
 public:
 	void mmr4000be(machine_config &config);
 	void mmr4000le(machine_config &config);
@@ -109,9 +112,7 @@ protected:
 	required_device<i82357_device> m_isp;
 	required_device<speaker_sound_device> m_buzzer;
 
-private:
-	// machine state
-	u8 m_led;
+	output_finder<> m_led;
 };
 
 #endif // MAME_INCLUDES_JAZZ_H

src/mame/layout/jazz.lay

@@ -0,0 +1,25 @@
+<?xml version="1.0"?>
+<!--
+license:CC0
+copyright-holders:Patrick Mackinlay
+Jazz graphics display with 7-segment diagnostic LED.
+
+TODO
+ - network/disk/floppy activity?
+ - keyboard indicators?
+-->
+<mamelayout version="2">
+  <element name="led" defstate="0">
+	<led7seg>
+	  <color red="0.0" green="1.0" blue="0.0" />
+	</led7seg>
+  </element>
+  <view name="Graphics">
+	<screen index="0">
+	  <bounds x="0" y="0" width="1280" height="1024" />
+	</screen>
+	<bezel name="led0" element="led">
+	  <bounds x="1240" y="1024" width="40" height="50" />
+	</bezel>
+  </view>
+</mamelayout>