summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/drivers/r2dtank.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/mame/drivers/r2dtank.cpp')
-rw-r--r--src/mame/drivers/r2dtank.cpp525
1 files changed, 525 insertions, 0 deletions
diff --git a/src/mame/drivers/r2dtank.cpp b/src/mame/drivers/r2dtank.cpp
new file mode 100644
index 00000000000..527660d0424
--- /dev/null
+++ b/src/mame/drivers/r2dtank.cpp
@@ -0,0 +1,525 @@
+// license:BSD-3-Clause
+// copyright-holders:David Haywood, Pierpaolo Prazzoli
+/*******************************************************************
+R2D Tank (c) 1980 Sigma Ent. Inc.
+
+driver by: David Haywood & Pierpaolo Prazzoli
+
+
+from the readme
+----------------------------------------------------
+Orca board number OVG-17A
+
+r2d1.1c is ROM #1 at board position 1C, and so on.
+
+1 = 2716
+2 = 2732
+3 = 2732
+4 = 2732
+5 = 2716 Sound
+
+CPU = 6809
+other = HD46505SP (6845) (CRT controller)
+other = MB14282(x2)
+other = HD468458SP
+other = MB14282
+other = MB14368
+other = HD6821 (x2) (PIA)
+other = HD46802
+other = M5L8226 (x2)
+RAM = 4116 (x11)
+
+----------------------------------------------------
+********************************************************************/
+
+#include "emu.h"
+#include "machine/rescap.h"
+#include "machine/6821pia.h"
+#include "machine/74123.h"
+#include "video/mc6845.h"
+#include "cpu/m6800/m6800.h"
+#include "cpu/m6809/m6809.h"
+#include "sound/ay8910.h"
+#include "machine/nvram.h"
+
+
+#define LOG_AUDIO_COMM (0)
+
+#define MAIN_CPU_MASTER_CLOCK (11200000)
+#define PIXEL_CLOCK (MAIN_CPU_MASTER_CLOCK / 2)
+#define CRTC_CLOCK (MAIN_CPU_MASTER_CLOCK / 16)
+
+class r2dtank_state : public driver_device
+{
+public:
+ r2dtank_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag),
+ m_videoram(*this, "videoram"),
+ m_colorram(*this, "colorram"),
+ m_maincpu(*this, "maincpu"),
+ m_palette(*this, "palette"),
+ m_audiocpu(*this, "audiocpu") { }
+
+ required_shared_ptr<UINT8> m_videoram;
+ required_shared_ptr<UINT8> m_colorram;
+ UINT8 m_flipscreen;
+ UINT32 m_ttl74123_output;
+ UINT8 m_AY8910_selected;
+
+ DECLARE_READ8_MEMBER(audio_command_r);
+ DECLARE_WRITE8_MEMBER(audio_command_w);
+ DECLARE_READ8_MEMBER(audio_answer_r);
+ DECLARE_WRITE8_MEMBER(audio_answer_w);
+ DECLARE_CUSTOM_INPUT_MEMBER(get_ttl74123_output);
+ DECLARE_WRITE_LINE_MEMBER(main_cpu_irq);
+ DECLARE_WRITE8_MEMBER(AY8910_select_w);
+ DECLARE_READ8_MEMBER(AY8910_port_r);
+ DECLARE_WRITE8_MEMBER(AY8910_port_w);
+ DECLARE_WRITE_LINE_MEMBER(flipscreen_w);
+ DECLARE_WRITE_LINE_MEMBER(display_enable_changed);
+ DECLARE_WRITE8_MEMBER(pia_comp_w);
+ virtual void machine_start();
+ DECLARE_WRITE8_MEMBER(ttl74123_output_changed);
+
+ MC6845_UPDATE_ROW(crtc_update_row);
+
+ required_device<cpu_device> m_maincpu;
+ required_device<palette_device> m_palette;
+ required_device<cpu_device> m_audiocpu;
+};
+
+
+
+/*************************************
+ *
+ * Prototypes
+ *
+ *************************************/
+
+
+
+
+
+/*************************************
+ *
+ * Interrupt generation
+ *
+ *************************************/
+
+WRITE_LINE_MEMBER(r2dtank_state::main_cpu_irq)
+{
+ pia6821_device *pia0 = machine().device<pia6821_device>("pia_main");
+ pia6821_device *pia1 = machine().device<pia6821_device>("pia_audio");
+ int combined_state = pia0->irq_a_state() | pia0->irq_b_state() |
+ pia1->irq_a_state() | pia1->irq_b_state();
+
+ m_maincpu->set_input_line(M6809_IRQ_LINE, combined_state ? ASSERT_LINE : CLEAR_LINE);
+}
+
+
+
+/*************************************
+ *
+ * Audio system - CPU 1
+ *
+ *************************************/
+
+READ8_MEMBER(r2dtank_state::audio_command_r)
+{
+ UINT8 ret = soundlatch_byte_r(space, 0);
+
+if (LOG_AUDIO_COMM) logerror("%08X CPU#1 Audio Command Read: %x\n", space.device().safe_pc(), ret);
+
+ return ret;
+}
+
+
+WRITE8_MEMBER(r2dtank_state::audio_command_w)
+{
+ soundlatch_byte_w(space, 0, ~data);
+ m_audiocpu->set_input_line(M6800_IRQ_LINE, HOLD_LINE);
+
+if (LOG_AUDIO_COMM) logerror("%08X CPU#0 Audio Command Write: %x\n", space.device().safe_pc(), data^0xff);
+}
+
+
+READ8_MEMBER(r2dtank_state::audio_answer_r)
+{
+ UINT8 ret = soundlatch2_byte_r(space, 0);
+if (LOG_AUDIO_COMM) logerror("%08X CPU#0 Audio Answer Read: %x\n", space.device().safe_pc(), ret);
+
+ return ret;
+}
+
+
+WRITE8_MEMBER(r2dtank_state::audio_answer_w)
+{
+ /* HACK - prevents lock-up, but causes game to end some in-between sreens prematurely */
+ if (space.device().safe_pc() == 0xfb12)
+ data = 0x00;
+
+ soundlatch2_byte_w(space, 0, data);
+ m_maincpu->set_input_line(M6809_IRQ_LINE, HOLD_LINE);
+
+if (LOG_AUDIO_COMM) logerror("%08X CPU#1 Audio Answer Write: %x\n", space.device().safe_pc(), data);
+}
+
+
+WRITE8_MEMBER(r2dtank_state::AY8910_select_w)
+{
+ /* not sure what all the bits mean:
+ D0 - ????? definetely used
+ D1 - not used?
+ D2 - selects ay8910 control or port
+ D3 - selects ay8910 #0
+ D4 - selects ay8910 #1
+ D5-D7 - not used */
+ m_AY8910_selected = data;
+
+if (LOG_AUDIO_COMM) logerror("%s: CPU#1 AY8910_select_w: %x\n", machine().describe_context(), data);
+}
+
+
+READ8_MEMBER(r2dtank_state::AY8910_port_r)
+{
+ UINT8 ret = 0;
+
+ if (m_AY8910_selected & 0x08)
+ ret = machine().device<ay8910_device>("ay1")->data_r(space, 0);
+
+ if (m_AY8910_selected & 0x10)
+ ret = machine().device<ay8910_device>("ay2")->data_r(space, 0);
+
+ return ret;
+}
+
+
+WRITE8_MEMBER(r2dtank_state::AY8910_port_w)
+{
+ if (m_AY8910_selected & 0x08)
+ machine().device<ay8910_device>("ay1")->data_address_w(space, m_AY8910_selected >> 2, data);
+
+ if (m_AY8910_selected & 0x10)
+ machine().device<ay8910_device>("ay2")->data_address_w(space, m_AY8910_selected >> 2, data);
+}
+
+
+/*************************************
+ *
+ * 74123
+ *
+ * This timer is responsible for
+ * delaying the PIA1's port input.
+ * This delay ensures that
+ * CA1 is only changed in the VBLANK
+ * region, but not in HBLANK
+ *
+ *************************************/
+
+WRITE8_MEMBER(r2dtank_state::ttl74123_output_changed)
+{
+ pia6821_device *pia = machine().device<pia6821_device>("pia_main");
+ pia->ca1_w(data);
+ m_ttl74123_output = data;
+}
+
+
+CUSTOM_INPUT_MEMBER(r2dtank_state::get_ttl74123_output)
+{
+ return m_ttl74123_output;
+}
+
+/*************************************
+ *
+ * Machine start
+ *
+ *************************************/
+
+void r2dtank_state::machine_start()
+{
+ /* setup for save states */
+ save_item(NAME(m_flipscreen));
+ save_item(NAME(m_ttl74123_output));
+ save_item(NAME(m_AY8910_selected));
+}
+
+
+
+/*************************************
+ *
+ * Video system
+ *
+ *************************************/
+
+
+WRITE_LINE_MEMBER(r2dtank_state::flipscreen_w)
+{
+ m_flipscreen = !state;
+}
+
+
+MC6845_UPDATE_ROW( r2dtank_state::crtc_update_row )
+{
+ UINT8 x = 0;
+
+ for (UINT8 cx = 0; cx < x_count; cx++)
+ {
+ UINT8 data, fore_color;
+
+ /* the memory is hooked up to the MA, RA lines this way */
+ offs_t offs = ((ma << 3) & 0x1f00) |
+ ((ra << 5) & 0x00e0) |
+ ((ma << 0) & 0x001f);
+
+ if (m_flipscreen)
+ offs = offs ^ 0x1fff;
+
+ data = m_videoram[offs];
+ fore_color = (m_colorram[offs] >> 5) & 0x07;
+
+ for (int i = 0; i < 8; i++)
+ {
+ UINT8 bit, color;
+
+ if (m_flipscreen)
+ {
+ bit = data & 0x01;
+ data = data >> 1;
+ }
+ else
+ {
+ bit = data & 0x80;
+ data = data << 1;
+ }
+
+ color = bit ? fore_color : 0;
+ bitmap.pix32(y, x) = m_palette->pen_color(color);
+
+ x = x + 1;
+ }
+
+ ma = ma + 1;
+ }
+}
+
+
+WRITE_LINE_MEMBER(r2dtank_state::display_enable_changed)
+{
+ machine().device<ttl74123_device>("74123")->a_w(generic_space(), 0, state);
+}
+
+
+/*************************************
+ *
+ * Memory handlers
+ *
+ *************************************/
+
+WRITE8_MEMBER(r2dtank_state::pia_comp_w)
+{
+ device_t *device = machine().device("pia_main");
+ downcast<pia6821_device *>(device)->write(machine().driver_data()->generic_space(), offset, ~data);
+}
+
+
+static ADDRESS_MAP_START( r2dtank_main_map, AS_PROGRAM, 8, r2dtank_state )
+ AM_RANGE(0x0000, 0x1fff) AM_RAM AM_SHARE("videoram")
+ AM_RANGE(0x2000, 0x3fff) AM_RAM
+ AM_RANGE(0x4000, 0x5fff) AM_RAM AM_SHARE("colorram")
+ AM_RANGE(0x6000, 0x7fff) AM_RAM
+ AM_RANGE(0x8000, 0x8003) AM_DEVREAD("pia_main", pia6821_device, read) AM_WRITE(pia_comp_w)
+ AM_RANGE(0x8004, 0x8004) AM_READWRITE(audio_answer_r, audio_command_w)
+ AM_RANGE(0xb000, 0xb000) AM_DEVWRITE("crtc", mc6845_device, address_w)
+ AM_RANGE(0xb001, 0xb001) AM_DEVWRITE("crtc", mc6845_device, register_w)
+ AM_RANGE(0xc000, 0xc007) AM_RAM AM_SHARE("nvram")
+ AM_RANGE(0xc800, 0xffff) AM_ROM
+ADDRESS_MAP_END
+
+
+static ADDRESS_MAP_START( r2dtank_audio_map, AS_PROGRAM, 8, r2dtank_state )
+ AM_RANGE(0x0000, 0x007f) AM_RAM /* internal RAM */
+ AM_RANGE(0xd000, 0xd003) AM_DEVREADWRITE("pia_audio", pia6821_device, read, write)
+ AM_RANGE(0xf000, 0xf000) AM_READWRITE(audio_command_r, audio_answer_w)
+ AM_RANGE(0xf800, 0xffff) AM_ROM
+ADDRESS_MAP_END
+
+
+
+/*************************************
+ *
+ * Port definition
+ *
+ *************************************/
+
+static INPUT_PORTS_START( r2dtank )
+
+ PORT_START("IN0")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 )
+ PORT_SERVICE_NO_TOGGLE(0x04, IP_ACTIVE_LOW)
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON1 )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_COCKTAIL
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START1 )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START2 )
+ PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM_MEMBER(DEVICE_SELF, r2dtank_state,get_ttl74123_output, NULL)
+
+ PORT_START("IN1")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_COCKTAIL
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_COCKTAIL
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_COCKTAIL
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_COCKTAIL
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_UP )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN )
+
+ PORT_START("DSWA")
+ PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x01, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x02, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x04, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x08, 0x00, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x08, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x10, 0x00, DEF_STR( Lives ) )
+ PORT_DIPSETTING( 0x00, "3" )
+ PORT_DIPSETTING( 0x10, "4" )
+ PORT_DIPNAME( 0x20, 0x20, DEF_STR( Cabinet ) )
+ PORT_DIPSETTING( 0x20, DEF_STR( Upright ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( Cocktail ) )
+ PORT_DIPNAME( 0xc0, 0x00, DEF_STR( Coinage ) )
+ PORT_DIPSETTING( 0x40, DEF_STR( 2C_1C ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( 1C_1C ) )
+ PORT_DIPSETTING( 0x80, DEF_STR( 1C_2C ) )
+ PORT_DIPSETTING( 0xc0, DEF_STR( Free_Play ) )
+
+ PORT_START("DSWB")
+ PORT_DIPNAME( 0x01, 0x00, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x01, DEF_STR( On ) )
+ PORT_DIPNAME( 0x02, 0x00, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x02, DEF_STR( On ) )
+ PORT_DIPNAME( 0x04, 0x00, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x04, DEF_STR( On ) )
+ PORT_DIPNAME( 0x08, 0x00, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x08, DEF_STR( On ) )
+ PORT_DIPNAME( 0x10, 0x00, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x10, DEF_STR( On ) )
+ PORT_DIPNAME( 0x20, 0x00, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x20, DEF_STR( On ) )
+ PORT_DIPNAME( 0x40, 0x00, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x40, DEF_STR( On ) )
+ PORT_DIPNAME( 0x80, 0x00, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x80, DEF_STR( On ) )
+
+INPUT_PORTS_END
+
+
+
+/*************************************
+ *
+ * Machine driver
+ *
+ *************************************/
+
+static MACHINE_CONFIG_START( r2dtank, r2dtank_state )
+ MCFG_CPU_ADD("maincpu", M6809,3000000) /* ?? too fast ? */
+ MCFG_CPU_PROGRAM_MAP(r2dtank_main_map)
+
+ MCFG_CPU_ADD("audiocpu", M6802,3000000) /* ?? */
+ MCFG_CPU_PROGRAM_MAP(r2dtank_audio_map)
+
+ MCFG_NVRAM_ADD_0FILL("nvram")
+
+ /* video hardware */
+ MCFG_SCREEN_ADD("screen", RASTER)
+ MCFG_SCREEN_RAW_PARAMS(PIXEL_CLOCK, 256, 0, 256, 256, 0, 256) /* temporary, CRTC will configure screen */
+ MCFG_SCREEN_UPDATE_DEVICE("crtc", mc6845_device, screen_update)
+
+ MCFG_PALETTE_ADD_3BIT_BGR("palette")
+
+ MCFG_MC6845_ADD("crtc", MC6845, "screen", CRTC_CLOCK)
+ MCFG_MC6845_SHOW_BORDER_AREA(false)
+ MCFG_MC6845_CHAR_WIDTH(8)
+ MCFG_MC6845_UPDATE_ROW_CB(r2dtank_state, crtc_update_row)
+ MCFG_MC6845_OUT_DE_CB(WRITELINE(r2dtank_state, display_enable_changed))
+
+ /* 74LS123 */
+
+ MCFG_DEVICE_ADD("74123", TTL74123, 0)
+ MCFG_TTL74123_CONNECTION_TYPE(TTL74123_GROUNDED) /* the hook up type */
+ MCFG_TTL74123_RESISTOR_VALUE(RES_K(22)) /* resistor connected to RCext */
+ MCFG_TTL74123_CAPACITOR_VALUE(CAP_U(0.01)) /* capacitor connected to Cext and RCext */
+ MCFG_TTL74123_A_PIN_VALUE(1) /* A pin - driven by the CRTC */
+ MCFG_TTL74123_B_PIN_VALUE(1) /* B pin - pulled high */
+ MCFG_TTL74123_CLEAR_PIN_VALUE(1) /* Clear pin - pulled high */
+ MCFG_TTL74123_OUTPUT_CHANGED_CB(WRITE8(r2dtank_state, ttl74123_output_changed))
+
+ MCFG_DEVICE_ADD("pia_main", PIA6821, 0)
+ MCFG_PIA_READPA_HANDLER(IOPORT("IN0"))
+ MCFG_PIA_READPB_HANDLER(IOPORT("IN1"))
+ MCFG_PIA_CB2_HANDLER(WRITELINE(r2dtank_state, flipscreen_w))
+ MCFG_PIA_IRQA_HANDLER(WRITELINE(r2dtank_state, main_cpu_irq))
+ MCFG_PIA_IRQB_HANDLER(WRITELINE(r2dtank_state, main_cpu_irq))
+
+ MCFG_DEVICE_ADD("pia_audio", PIA6821, 0)
+ MCFG_PIA_READPA_HANDLER(READ8(r2dtank_state, AY8910_port_r))
+ MCFG_PIA_WRITEPA_HANDLER(WRITE8(r2dtank_state, AY8910_port_w))
+ MCFG_PIA_WRITEPB_HANDLER(WRITE8(r2dtank_state, AY8910_select_w))
+ MCFG_PIA_IRQA_HANDLER(WRITELINE(r2dtank_state, main_cpu_irq))
+ MCFG_PIA_IRQB_HANDLER(WRITELINE(r2dtank_state, main_cpu_irq))
+
+ /* audio hardware */
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+
+ MCFG_SOUND_ADD("ay1", AY8910, (4000000 / 4))
+ MCFG_AY8910_PORT_A_READ_CB(IOPORT("DSWB"))
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
+
+ MCFG_SOUND_ADD("ay2", AY8910, (4000000 / 4))
+ MCFG_AY8910_PORT_A_READ_CB(IOPORT("IN1"))
+ MCFG_AY8910_PORT_B_READ_CB(IOPORT("DSWA"))
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
+
+MACHINE_CONFIG_END
+
+
+
+/*************************************
+ *
+ * ROM definition
+ *
+ *************************************/
+
+ROM_START( r2dtank )
+ ROM_REGION( 0x10000, "maincpu", 0 )
+ ROM_LOAD( "r2d1.1c", 0xc800, 0x0800, CRC(20606a0f) SHA1(9a55e595c7ea332bdc89142338947be8a28a92a3) )
+ ROM_LOAD( "r2d2.1a", 0xd000, 0x1000, CRC(7561c67f) SHA1(cccc7bbd7975db340fe571a4c31c25b41b2563b8) )
+ ROM_LOAD( "r2d3.2c", 0xe000, 0x1000, CRC(fc53c538) SHA1(8f9a2edcf7a2cb2a8ddd084828b52f1bf45f434a) )
+ ROM_LOAD( "r2d4.2a", 0xf000, 0x1000, CRC(56636225) SHA1(dcfc6e29b4c51a45cfbecf6790b7d88b89af433b) )
+
+ ROM_REGION( 0x10000, "audiocpu", 0 )
+ ROM_LOAD( "r2d5.7l", 0xf800, 0x0800, CRC(c49bed15) SHA1(ffa635a65c024c532bb13fb91bbd3e54923e81bf) )
+ROM_END
+
+
+
+/*************************************
+ *
+ * Game driver
+ *
+ *************************************/
+
+GAME( 1980, r2dtank, 0, r2dtank, r2dtank, driver_device, 0, ROT270, "Sigma Enterprises Inc.", "R2D Tank", MACHINE_SUPPORTS_SAVE)