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https://github.com/holub/mame
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miconkit: added ppi8255 chip
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@ -2,29 +2,29 @@
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// copyright-holders:hap
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/******************************************************************************
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SNK Micon-Kit / Micon-Block
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SNK Micon-Kit series
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Games on this hardware:
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- Micon-Kit
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- Micon-Kit Part II (aka Yamato)
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- Space Micon Kit
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The upright cabinet versions were called Micon-Block.
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The cocktail cabinets were called Table Micon, and the upright version of the
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first game was apparently called Micon-Block.
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Micon-Kit was SNK's first arcade game, it's a simple Breakout clone. The sequel
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adds moving obstacles. The 3rd game in the series, Space Micon Kit, adds a 2nd
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row of bricks.
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Hardware notes:
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- 8080 CPU
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- 4KB ROM, 256 bytes RAM
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- 4KB VRAM, 1bpp video with color overlay
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- NEC 8080A, 18.432MHz XTAL
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- NEC 8228, NEC 8255C
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- 4KB ROM (4*MB8518), 256 bytes RAM, 4KB VRAM
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- 1bpp video with color overlay, 11MHz XTAL
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- beeper
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TODO:
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- unknown exact CPU type
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- unknown XTAL/CPU clock
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- any peripheral chips?
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- verify CPU clock divider
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- correct video timing
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******************************************************************************/
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@ -32,6 +32,7 @@ TODO:
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#include "emu.h"
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#include "cpu/i8085/i8085.h"
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#include "machine/i8255.h"
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#include "sound/beep.h"
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#include "screen.h"
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@ -48,6 +49,7 @@ public:
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miconkit_state(const machine_config &mconfig, device_type type, const char *tag) :
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driver_device(mconfig, type, tag),
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m_maincpu(*this, "maincpu"),
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m_ppi(*this, "ppi"),
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m_screen(*this, "screen"),
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m_vram(*this, "vram"),
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m_beeper(*this, "beeper"),
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@ -61,6 +63,7 @@ protected:
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private:
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required_device<cpu_device> m_maincpu;
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required_device<i8255_device> m_ppi;
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required_device<screen_device> m_screen;
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required_shared_ptr<u8> m_vram;
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required_device<beep_device> m_beeper;
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@ -73,8 +76,7 @@ private:
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u8 paddle_r();
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void sound_w(u8 data);
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u8 port2_r();
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void port2_w(u8 data);
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u8 vblank_r();
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void select_w(u8 data);
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u8 input_r();
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@ -125,19 +127,14 @@ void miconkit_state::sound_w(u8 data)
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m_beeper->set_clock(248 * data);
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}
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void miconkit_state::port2_w(u8 data)
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{
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// ?
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}
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void miconkit_state::select_w(u8 data)
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{
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// d0: input select
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// other: unused?
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// other: ?
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m_select = data & 1;
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}
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u8 miconkit_state::port2_r()
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u8 miconkit_state::vblank_r()
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{
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// d6: vblank flag
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// other: ?
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@ -166,10 +163,7 @@ void miconkit_state::main_map(address_map &map)
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void miconkit_state::io_map(address_map &map)
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{
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map(0x00, 0x00).r(FUNC(miconkit_state::paddle_r));
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map(0x01, 0x01).w(FUNC(miconkit_state::sound_w));
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map(0x02, 0x02).rw(FUNC(miconkit_state::port2_r), FUNC(miconkit_state::port2_w));
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map(0x03, 0x03).w(FUNC(miconkit_state::select_w));
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map(0x00, 0x03).rw(m_ppi, FUNC(i8255_device::read), FUNC(i8255_device::write));
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map(0x04, 0x04).r(FUNC(miconkit_state::input_r));
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}
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@ -221,10 +215,16 @@ INPUT_PORTS_END
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void miconkit_state::micon2(machine_config &config)
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{
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// basic machine hardware
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I8080A(config, m_maincpu, 2000000);
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I8080A(config, m_maincpu, 18.432_MHz_XTAL / 9);
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m_maincpu->set_addrmap(AS_PROGRAM, &miconkit_state::main_map);
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m_maincpu->set_addrmap(AS_IO, &miconkit_state::io_map);
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I8255(config, m_ppi);
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m_ppi->in_pa_callback().set(FUNC(miconkit_state::paddle_r));
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m_ppi->out_pb_callback().set(FUNC(miconkit_state::sound_w));
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m_ppi->out_pc_callback().set(FUNC(miconkit_state::select_w));
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m_ppi->in_pc_callback().set(FUNC(miconkit_state::vblank_r));
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// video hardware
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SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
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m_screen->set_refresh_hz(60);
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@ -232,6 +232,7 @@ void miconkit_state::micon2(machine_config &config)
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m_screen->set_visarea(0, 240-1, 12, 128-12-1);
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m_screen->set_vblank_time(ATTOSECONDS_IN_USEC(2500));
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m_screen->set_screen_update(FUNC(miconkit_state::screen_update));
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m_screen->screen_vblank().set(m_ppi, FUNC(i8255_device::pc4_w));
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// sound hardware
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SPEAKER(config, "mono").front_center();
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@ -246,10 +247,10 @@ void miconkit_state::micon2(machine_config &config)
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ROM_START( micon2 )
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ROM_REGION( 0x10000, "maincpu", 0 )
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ROM_LOAD( "ufo_0", 0x0000, 0x0400, CRC(3eb5a299) SHA1(5e7de4cb8312be8b84f7e5e035b61a6cb9798bc0) )
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ROM_LOAD( "ufo_1", 0x0400, 0x0400, CRC(e796338e) SHA1(86c5f283b4a41e19dd0b624d04e1a62ff2ffbf58) )
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ROM_LOAD( "ufo_2", 0x0800, 0x0400, CRC(bf246cd7) SHA1(147fb9b877ee108c9c09461ae7e0d72af9ab3275) )
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ROM_LOAD( "ufo_3", 0x0c00, 0x0400, CRC(0e93b4f0) SHA1(9405e85a7e005edd0043cb43ce2ef283b4c1b341) )
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ROM_LOAD( "ufo_n2_0", 0x0000, 0x0400, CRC(3eb5a299) SHA1(5e7de4cb8312be8b84f7e5e035b61a6cb9798bc0) )
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ROM_LOAD( "ufo_n2_1", 0x0400, 0x0400, CRC(e796338e) SHA1(86c5f283b4a41e19dd0b624d04e1a62ff2ffbf58) )
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ROM_LOAD( "ufo_n2_2", 0x0800, 0x0400, CRC(bf246cd7) SHA1(147fb9b877ee108c9c09461ae7e0d72af9ab3275) )
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ROM_LOAD( "ufo_n2_3", 0x0c00, 0x0400, CRC(0e93b4f0) SHA1(9405e85a7e005edd0043cb43ce2ef283b4c1b341) )
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ROM_END
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} // anonymous namespace
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