Skip to content

Polar Star 2 #14445

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 11 commits into from
Nov 1, 2025
Merged

Polar Star 2 #14445

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
11 commits
Select commit Hold shift + click to select a range
9177a19
polarstar2
stonedDiscord Sep 11, 2025
84d224b
fix date and hash
stonedDiscord Sep 11, 2025
8a7dd1a
09 sent to 3b
stonedDiscord Sep 12, 2025
d439b7f
Merge remote-tracking branch 'upstream/master' into polarstar2
stonedDiscord Oct 7, 2025
23d241c
sound io map
stonedDiscord Oct 8, 2025
bae11e0
add docs and merge
stonedDiscord Oct 29, 2025
81ad0fd
Merge remote-tracking branch 'upstream/master' into polarstar2
stonedDiscord Oct 29, 2025
9b7ae72
oki warning
stonedDiscord Oct 29, 2025
9677cca
forgot about io map
stonedDiscord Oct 31, 2025
fe93bc6
no dips
stonedDiscord Oct 31, 2025
24802e5
sound fix
stonedDiscord Nov 1, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions src/mame/mame.lst
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -44030,6 +44030,7 @@ shine

@source:skeleton/shoken_md06.cpp
petitlot
polarstar2

@source:skeleton/si5500.cpp
si5500
Expand Down
70 changes: 63 additions & 7 deletions src/mame/skeleton/shoken_md06.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -18,13 +18,21 @@ push-button (reset?)
unpopulates spaces marked for MSM9810B and ROM

DIP sheets are available

ポーラスター2 (Polar Star 2) by Showa Giken (Shoken)
'MB-01 MAIN-B' PCB:
KL5C80A12CFP CPU
RTC62423 RTC
push-button (reset?)
16.00000 MHz XTAL
*/


#include "emu.h"

#include "cpu/z80/kl5c80a12.h"
#include "machine/msm6242.h"
#include "sound/okim9810.h"

#include "emupal.h"
#include "screen.h"
Expand All @@ -42,27 +50,39 @@ class shoken_md06_state : public driver_device
{ }

void petitlot(machine_config &config) ATTR_COLD;
void polarstar(machine_config &config) ATTR_COLD;

private:
required_device<kl5c80a12_device> m_maincpu;

void program_map(address_map &map) ATTR_COLD;
void io_map(address_map &map) ATTR_COLD;
void sound_io_map(address_map &map) ATTR_COLD;
};


void shoken_md06_state::program_map(address_map &map)
{
map(0x00000, 0x04fff).rom();
map(0x00000, 0x08fff).rom();
map(0x09000, 0x0cfff).ram();
map(0xe0000, 0xe3fff).ram();
map(0xfcc00, 0xfffff).ram();
}

void shoken_md06_state::io_map(address_map &map)
{
map.global_mask(0xff);
map.unmap_value_high();
map(0x40, 0x40).nopw();
map(0x80, 0x80).noprw();
}

void shoken_md06_state::sound_io_map(address_map &map)
{
map.global_mask(0xff);
map(0x3b, 0x3b).rw("oki", FUNC(okim9810_device::read), FUNC(okim9810_device::write));
map(0x40, 0x40).nopw();
map(0x80, 0x80).noprw();
}

static INPUT_PORTS_START( petitlot )
PORT_START("IN0")
Expand Down Expand Up @@ -129,6 +149,28 @@ static INPUT_PORTS_START( petitlot )
// TODO: 5 10-position rotary switches
INPUT_PORTS_END

static INPUT_PORTS_START( polarstar )
PORT_START("IN0")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )

PORT_START("IN1")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )
INPUT_PORTS_END


void shoken_md06_state::petitlot(machine_config &config)
{
Expand All @@ -138,20 +180,34 @@ void shoken_md06_state::petitlot(machine_config &config)
m_maincpu->set_addrmap(AS_IO, &shoken_md06_state::io_map);

RTC62423(config, "rtc", 0);
}

void shoken_md06_state::polarstar(machine_config &config)
{
petitlot(config);
m_maincpu->set_addrmap(AS_IO, &shoken_md06_state::sound_io_map);

// sound hardware
SPEAKER(config, "mono").front_center();

// TODO: sound related ICs aren't present?
okim9810_device &oki(OKIM9810(config, "oki", 16_MHz_XTAL / 12));
oki.add_route(ALL_OUTPUTS, "mono", 1.0); //divider guessed
}


ROM_START( petitlot )
ROM_REGION( 0x10000, "maincpu", 0 )
ROM_LOAD( "md06_ver4_1.ic6", 0x00000, 0x10000, CRC(ebc81f10) SHA1(28ac52aeadfbf792da95c01b16fb88f7a5eb1d4e) ) // 1xxxxxxxxxxxxxxx = 0xFF
ROM_LOAD( "md06_ver4_1.ic6", 0x00000, 0x10000, CRC(ebc81f10) SHA1(28ac52aeadfbf792da95c01b16fb88f7a5eb1d4e) ) // 1xxxxxxxxxxxxxxx = 0xff
Copy link
Member

@Osso13 Osso13 Nov 1, 2025

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

this is romcmp's output in a comment, it isn't subject to MAME's preference for lowercase hex.

ROM_END

} // anonymous namespace
ROM_START( polarstar2 )
ROM_REGION( 0x20000, "maincpu", 0 )
ROM_LOAD( "polarstar2_mk04_ver.4.5.ic8", 0x00000, 0x20000, CRC(13a7b9dc) SHA1(64aa5591aa676cbb9e00327ac62209b6854c4416) )

ROM_REGION( 0x100000, "oki", 0 )
ROM_LOAD( "polarstar_mb01_sound-b.ic35", 0x00000, 0x100000, CRC(606ae52c) SHA1(6a60f4b1c6ac893cafa373c8af7d2c826304f152) )
ROM_END

} // anonymous namespace

GAME( 2001, petitlot, 0, petitlot, petitlot, shoken_md06_state, empty_init, ROT0, "Shoken", "Petit Lot (ver. 4.1)", MACHINE_NO_SOUND | MACHINE_NOT_WORKING | MACHINE_MECHANICAL )
GAME( 2001, petitlot, 0, petitlot, petitlot, shoken_md06_state, empty_init, ROT0, "Shoken", "Petit Lot (ver. 4.1)", MACHINE_NO_SOUND | MACHINE_NOT_WORKING | MACHINE_MECHANICAL )
GAME( 2004, polarstar2, 0, polarstar, polarstar, shoken_md06_state, empty_init, ROT0, "Shoken", "Polar Star 2 (ver. 4.5)", MACHINE_NO_SOUND | MACHINE_NOT_WORKING | MACHINE_MECHANICAL )
Loading