new NOT_WORKING machine (#5811)

* minor spelling fix

* new NOT_WORKING machine

Gigatron TTL Microcomputer [Sterophonick]

also add a skeleton cpu core

* Revert Minor Spelling Fix

* Make some fixes

thanks cuavas

* Fix resolution

* gigatron: update cpu device name

* update copyright

* fix part of gigatron disassembler

* Set screen refresh rate

* found a set of all the ROM files, update main ROM name

* Fix cpu.lua

* Whoops

* Update gigatron.cpp

* gigatron: clear execute_set_input

* Update gigatron.h

* Update gigatrondasm.cpp

* Update gigatrondasm.h

* clean up but doesnt compile ffs

scripts/src/cpu.lua

@@ -2982,6 +2982,22 @@ if (CPUS["CR16B"]~=null or _OPTIONS["with-tools"]) then
 end
 
 --------------------------------------------------
+-- Gigatron
+--@src/devices/cpu/gigatron.h,CPUS["GTRON"] = true
+--------------------------------------------------
+
+if (CPUS["GTRON"]~=null) then
+	files {
+		MAME_DIR .. "src/devices/cpu/gigatron/gigatron.cpp",
+		MAME_DIR .. "src/devices/cpu/gigatron/gigatron.h",
+	}
+end
+
+if (CPUS["GTRON"]~=null or _OPTIONS["with-tools"]) then
+	table.insert(disasm_files , MAME_DIR .. "src/devices/cpu/gigatron/gigatrondasm.cpp")
+	table.insert(disasm_files , MAME_DIR .. "src/devices/cpu/gigatron/gigatrondasm.h")
+end
+
 -- Motorola DSP56000
 --@src/devices/cpu/dsp56000/dsp56000.h,CPUS["DSP56000"] = true
 --------------------------------------------------
@@ -3081,4 +3097,5 @@ end
 if (CPUS["RX01"]~=null or _OPTIONS["with-tools"]) then
 	table.insert(disasm_files , MAME_DIR .. "src/devices/cpu/rx01/rx01dasm.cpp")
 	table.insert(disasm_files , MAME_DIR .. "src/devices/cpu/rx01/rx01dasm.h")
+
 end

src/devices/cpu/gigatron/gigatron.cpp

@@ -0,0 +1,129 @@
+// license:BSD-3-Clause
+// copyright-holders:Sterophonick
+/*****************************************************************************
+ *
+ * Skeleton device for Gigatron CPU Core
+ *
+ *****************************************************************************/
+
+#include "emu.h"
+#include "gigatron.h"
+#include "debugger.h"
+
+
+DEFINE_DEVICE_TYPE(GTRON, gigatron_cpu_device, "gigatron", "GTRON")
+
+
+/* FLAGS */
+#if 0
+#define S  0x80
+#define Z  0x40
+#define OV 0x20
+#define C  0x10
+#endif
+
+
+#define gigatron_readop(A) m_program->read_dword(A)
+#define gigatron_readmem16(A) m_data->read_dword(A)
+#define gigatron_writemem16(A,B) m_data->write_dword((A),B)
+
+
+/***********************************
+ *  illegal opcodes
+ ***********************************/
+void gigatron_cpu_device::gigatron_illegal()
+{
+	logerror("gigatron illegal opcode at 0x%04x\n", m_pc);
+	m_icount -= 1;
+}
+
+/* Execute cycles */
+void gigatron_cpu_device::execute_run()
+{
+	uint16_t opcode;
+
+	do
+	{
+		debugger_instruction_hook(this, m_pc);
+
+		opcode = gigatron_readop(m_pc);
+		m_pc++;
+
+		switch( opcode )
+		{
+			default:
+				gigatron_illegal();
+				break;
+		}
+
+	} while( m_icount > 0 );
+}
+
+
+void gigatron_cpu_device::device_start()
+{
+	m_program = &space(AS_PROGRAM);
+	m_data = &space(AS_DATA);
+
+	save_item(NAME(m_pc));
+	save_item(NAME(m_flags));
+
+	// Register state for debugger
+	state_add( GTRON_R0, "PC", m_pc ).formatstr("%02X");
+	state_add( STATE_GENPC, "GENPC", m_r[7] ).noshow();
+	state_add( STATE_GENPCBASE, "CURPC", m_r[7] ).noshow();
+	state_add( STATE_GENFLAGS, "GENFLAGS", m_flags ).noshow();
+
+	m_icountptr = &m_icount;
+}
+
+#if 0
+void gigatron_cpu_device::execute_set_input(int irqline, int state)
+{
+	switch(irqline)
+	{
+		case GTRON_INT_INTRM: // level-sensitive
+			m_intrm_pending = ((ASSERT_LINE == state) || (HOLD_LINE == state));
+			m_intrm_state = (ASSERT_LINE == state);
+			break;
+		case GTRON_RESET: // edge-sensitive
+			if (CLEAR_LINE != state)
+				m_reset_pending = 1;
+			m_reset_state = (ASSERT_LINE == state);
+			break;
+		case GTRON_INT_INTR: // edge-sensitive
+			if (CLEAR_LINE != state)
+				m_intr_pending = 1;
+			m_intr_state = (ASSERT_LINE == state);
+			break;
+	}
+}
+#endif
+
+gigatron_cpu_device::gigatron_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+	: cpu_device(mconfig, GTRON, tag, owner, clock)
+	, m_program_config("program", ENDIANNESS_BIG, 8, 32, -1)
+	, m_data_config("data", ENDIANNESS_BIG, 8, 32, 0)
+{
+}
+
+
+void gigatron_cpu_device::state_string_export(const device_state_entry &entry, std::string &str) const
+{
+	switch (entry.index())
+	{
+		case STATE_GENFLAGS:
+			str = util::string_format("%c%c%c%c",
+					m_flags & 0x80 ? 'S':'.',
+					m_flags & 0x40 ? 'Z':'.',
+					m_flags & 0x20 ? 'V':'.',
+					m_flags & 0x10 ? 'C':'.');
+			break;
+	}
+}
+
+
+offs_t gigatron_cpu_device::disassemble(char *buffer, offs_t pc, const uint32_t *oprom, const uint32_t *opram, uint32_t options)
+{
+	return CPU_DISASSEMBLE_NAME(gigatron)(this, buffer, pc, opcodes, params, options);
+}

src/devices/cpu/gigatron/gigatron.h

@@ -0,0 +1,62 @@
+// license:BSD-3-Clause
+// copyright-holders:Sterophonick
+/*****************************************************************************
+ *
+ * Skeleton Device for Gigatron CPU Core
+ *
+ *****************************************************************************/
+
+#ifndef MAME_CPU_GTRON_H
+#define MAME_CPU_GTRON_H
+
+#pragma once
+
+enum
+{
+	GTRON_R0=1, GTRON_R1, GTRON_R2, GTRON_R3,
+	GTRON_R4, GTRON_R5, GTRON_R6, GTRON_R7
+};
+
+
+class gigatron_cpu_device :  public cpu_device
+{
+public:
+	// construction/destruction
+	gigatron_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+protected:
+	// device-level overrides
+	virtual void device_start() override;
+	virtual void device_reset() override;
+
+	// device_execute_interface overrides
+	virtual uint32_t execute_min_cycles() const noexcept override { return 1; }
+	virtual uint32_t execute_max_cycles() const noexcept override { return 7; }
+	virtual uint32_t execute_input_lines() const noexcept override { return 0; }
+	virtual void execute_run() override;
+	virtual void execute_set_input(int inputnum, int state) override;
+
+	// device_state_interface overrides
+	virtual void state_string_export(const device_state_entry &entry, std::string &str) const override;
+
+
+private:
+	address_space_config m_program_config;
+
+	uint8_t   m_pc;   /* registers */
+	uint8_t   m_flags;  /* flags */
+	address_space *m_program;
+	address_space *m_data;
+	int m_icount;
+
+	void gigatron_illegal();
+
+};
+
+
+DECLARE_DEVICE_TYPE(GTRON, gigatron_cpu_device)
+
+
+
+#endif // MAME_CPU_GTRON_H
+

src/devices/cpu/gigatron/gigatrondasm.cpp

@@ -0,0 +1,17 @@
+// license:BSD-3-Clause
+// copyright-holders:Sterophonick
+
+// Gigatron Disassembler
+
+#include "emu.h"
+#include "gigatrondasm.h"
+
+u32 gigatron_disassembler::opcode_alignment() const
+{
+	return 0;
+}
+
+offs_t gigatron_disassembler::disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer &params)
+{
+	return 0;
+}

src/devices/cpu/gigatron/gigatrondasm.h

@@ -0,0 +1,24 @@
+// license:BSD-3-Clause
+// copyright-holders:Sterophonick
+
+// Gigatron disassembler
+
+#ifndef MAME_CPU_GIGATRON_GIGATRONDASM_H
+#define MAME_CPU_GIGATRON_GIGATRONDASM_H
+
+#pragma once
+
+class gigatron_disassembler : public util::disasm_interface
+{
+public:
+	gigatron_disassembler() = default;
+	virtual ~gigatron_disassembler() = default;
+
+	virtual u32 opcode_alignment() const override;
+	virtual offs_t disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer &params) override;
+
+private:
+};
+
+#endif
+

src/mame/drivers/gigatron.cpp

@@ -0,0 +1,50 @@
+// license:BSD-3-Clause
+// copyright-holders:Sterophonick
+/***************************************************************************
+
+   Skeleton driver for Gigatron TTL Microcomputer
+   Driver by Sterophonick
+
+***************************************************************************/
+
+#include "emu.h"
+#include "cpu/m6502/m6502.h"
+//#include "cpu/gigatron/gigatron.h"
+#include "machine/nvram.h"
+#include "speaker.h"
+
+#define MAIN_CLOCK 6250000
+
+class gigatron_state : public driver_device
+{
+public:
+	gigatron_state(const machine_config &mconfig, device_type type, const char *tag)
+		: driver_device(mconfig, type, tag)
+		, m_maincpu(*this, "maincpu")
+	{
+	}
+
+	void gigatron(machine_config &config);
+
+private:
+
+	required_device<cpu_device> m_maincpu;
+};
+
+static INPUT_PORTS_START(gigatron)
+INPUT_PORTS_END
+
+void gigatron_state::gigatron(machine_config &config)
+{
+	M6502(config, m_maincpu, MAIN_CLOCK); // actually its own custom cpu but i cant get it to work
+	//GTRON(config, m_maincpu, MAIN_CLOCK);
+	SPEAKER(config, "mono").front_center();
+
+}
+
+ROM_START( gigatron )
+	ROM_REGION( 0x00000, "maincpu", 0 )
+	ROM_LOAD( "gigatron.rom",  0x0000, 0x20000, CRC(78995109) SHA1(2395fc48e64099836111f5aeca39ddbf4650ea4e) )
+ROM_END
+
+GAME(199?, gigatron,         0, gigatron, gigatron, gigatron_state, empty_init, ROT0, "Marcel van Kervinck", "Gigatron TTL Microcomputer", MACHINE_IS_SKELETON_MECHANICAL)

src/mame/mame.lst

@@ -14620,6 +14620,9 @@ touryuu                         // (c) 200? Yuki Enterprise
 giclasex
 giclassvr
 
+@source:gigatron.cpp
+gigatron						// (c) 2018 Marcel van Kervinck
+
 @source:gijoe.cpp
 gijoe                           // GX069 (c) 1991 (World)
 gijoea                          // GX069 (c) 1991 (Asia)

src/mame/mess.flt

@@ -315,6 +315,7 @@ geneve.cpp
 geniusiq.cpp
 geniusjr.cpp
 genpc.cpp
+gigatron.cpp
 gimix.cpp
 gkidabc.cpp
 gizmondo.cpp