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1943: Hook up MCU to driver, remove simulation

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This commit is contained in:
Dirk Best 2019-07-24 11:26:00 +02:00
parent 341168a2e9
commit 8b733c17bb
2 changed files with 81 additions and 72 deletions
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133
src/mame/drivers/1943.cpp
View File

@ -26,8 +26,17 @@
TODO:
- use priority PROM for drawing sprites
- hook up the C8751H-88 MCU
- find and dump an unmodified bme01.12d to correct the 1943 Euro set
- Accurate interrupt handling
- Screen raw parameters
Notes:
- The MCU is actually hooked up to a lot more than it actually uses.
It can potentially communicate with the audio CPU, read the current
vertical line and has a vblank counter. All this isn't used by the MCU
program, it only exchanges a value with the main CPU.
*/
@ -43,59 +52,21 @@
/* Protection Handlers */
void _1943_state::protection_w(u8 data)
INTERRUPT_GEN_MEMBER(_1943_state::mcu_irq)
{
m_prot_value = data;
m_mcu->set_input_line(MCS51_INT1_LINE, HOLD_LINE);
}
u8 _1943_state::protection_r()
void _1943_state::mcu_p3_w(u8 data)
{
// The game crashes (through a jump to 0x8000) if the return value is not what it expects..
switch (m_prot_value)
// write strobe
if (BIT(m_mcu_p3, 6) == 1 && BIT(data, 6) == 0)
{
// This data comes from a table at $21a containing 64 entries, even is "case", odd is return value.
case 0x24: return 0x1d;
case 0x60: return 0xf7;
case 0x01: return 0xac;
case 0x55: return 0x50;
case 0x56: return 0xe2;
case 0x2a: return 0x58;
case 0xa8: return 0x13;
case 0x22: return 0x3e;
case 0x3b: return 0x5a;
case 0x1e: return 0x1b;
case 0xe9: return 0x41;
case 0x7d: return 0xd5;
case 0x43: return 0x54;
case 0x37: return 0x6f;
case 0x4c: return 0x59;
case 0x5f: return 0x56;
case 0x3f: return 0x2f;
case 0x3e: return 0x3d;
case 0xfb: return 0x36;
case 0x1d: return 0x3b;
case 0x27: return 0xae;
case 0x26: return 0x39;
case 0x58: return 0x3c;
case 0x32: return 0x51;
case 0x1a: return 0xa8;
case 0xbc: return 0x33;
case 0x30: return 0x4a;
case 0x64: return 0x12;
case 0x11: return 0x40;
case 0x33: return 0x35;
case 0x09: return 0x17;
case 0x25: return 0x04;
m_mcu_to_cpu = m_mcu_p0;
m_mcu_to_audiocpu = m_mcu_p2;
}
return 0;
}
// The bootleg expects 0x00 to be returned from the protection reads because the protection has been patched out.
u8 _1943_state::_1943b_c007_r()
{
return 0;
m_mcu_p3 = data;
}
@ -110,11 +81,11 @@ void _1943_state::c1943_map(address_map &map)
map(0xc002, 0xc002).portr("P2");
map(0xc003, 0xc003).portr("DSWA");
map(0xc004, 0xc004).portr("DSWB");
map(0xc007, 0xc007).r(FUNC(_1943_state::protection_r));
map(0xc007, 0xc007).lr8("mcu_r", [this]() -> u8 { return m_mcu_to_cpu; });
map(0xc800, 0xc800).w("soundlatch", FUNC(generic_latch_8_device::write));
map(0xc804, 0xc804).w(FUNC(_1943_state::c804_w)); // ROM bank switch, screen flip
map(0xc806, 0xc806).w("watchdog", FUNC(watchdog_timer_device::reset_w));
map(0xc807, 0xc807).w(FUNC(_1943_state::protection_w));
map(0xc807, 0xc807).lw8("mcu_w", [this](u8 data) { m_cpu_to_mcu = data; });
map(0xd000, 0xd3ff).ram().w(FUNC(_1943_state::videoram_w)).share("videoram");
map(0xd400, 0xd7ff).ram().w(FUNC(_1943_state::colorram_w)).share("colorram");
map(0xd800, 0xd801).ram().share("scrollx");
@ -129,11 +100,22 @@ void _1943_state::c1943_map(address_map &map)
map(0xf000, 0xffff).ram().share("spriteram");
}
void _1943_state::c1943b_map(address_map &map)
{
c1943_map(map);
// the bootleg expects 0x00 to be returned from the protection reads
// because the protection has been patched out
map(0xc007, 0xc007).lr8("mcu_r", [this]() -> u8 { return 0x00; });
map(0xc807, 0xc807).noprw();
}
void _1943_state::sound_map(address_map &map)
{
map(0x0000, 0x7fff).rom();
map(0xc000, 0xc7ff).ram();
map(0xc800, 0xc800).r("soundlatch", FUNC(generic_latch_8_device::read));
map(0xd800, 0xd800).lrw8("mcu", [this]() { return m_mcu_to_audiocpu; }, [this](u8 data) { m_audiocpu_to_mcu = data; });
map(0xe000, 0xe001).w("ym1", FUNC(ym2203_device::write));
map(0xe002, 0xe003).w("ym2", FUNC(ym2203_device::write));
}
@ -274,7 +256,13 @@ GFXDECODE_END
void _1943_state::machine_start()
{
save_item(NAME(m_prot_value));
save_item(NAME(m_cpu_to_mcu));
save_item(NAME(m_mcu_to_cpu));
save_item(NAME(m_audiocpu_to_mcu));
save_item(NAME(m_mcu_to_audiocpu));
save_item(NAME(m_mcu_p0));
save_item(NAME(m_mcu_p2));
save_item(NAME(m_mcu_p3));
}
void _1943_state::machine_reset()
@ -283,7 +271,6 @@ void _1943_state::machine_reset()
m_obj_on = 0;
m_bg1_on = 0;
m_bg2_on = 0;
m_prot_value = 0;
}
void _1943_state::_1943(machine_config &config)
@ -297,6 +284,15 @@ void _1943_state::_1943(machine_config &config)
audiocpu.set_addrmap(AS_PROGRAM, &_1943_state::sound_map);
audiocpu.set_periodic_int(FUNC(_1943_state::irq0_line_hold), attotime::from_hz(4*60));
I8751(config, m_mcu, XTAL(24'000'000)/4); // clock unknown
m_mcu->port_in_cb<0>().set([this](){ return m_cpu_to_mcu; });
m_mcu->port_out_cb<0>().set([this](u8 data){ m_mcu_p0 = data; });
m_mcu->port_in_cb<1>().set([this]{ return m_screen->vpos(); });
m_mcu->port_in_cb<2>().set([this](){ return m_audiocpu_to_mcu; });
m_mcu->port_out_cb<2>().set([this](u8 data){ m_mcu_p2 = data; });
m_mcu->port_out_cb<3>().set(FUNC(_1943_state::mcu_p3_w));
m_mcu->set_vblank_int("screen", FUNC(_1943_state::mcu_irq));
WATCHDOG_TIMER(config, "watchdog");
// video hardware
@ -329,6 +325,15 @@ void _1943_state::_1943(machine_config &config)
ym2.add_route(3, "mono", 0.10);
}
void _1943_state::_1943b(machine_config &config)
{
_1943(config);
m_maincpu->set_addrmap(AS_PROGRAM, &_1943_state::c1943b_map);
config.device_remove("mcu");
}
/* ROMs */
ROM_START( 1943 )
@ -914,21 +919,15 @@ void _1943_state::init_1943()
m_mainbank->configure_entries(0, 8, &ROM[0x10000], 0x4000);
}
void _1943_state::init_1943b()
{
init_1943();
m_maincpu->space(AS_PROGRAM).install_read_handler(0xc007, 0xc007, read8smo_delegate(FUNC(_1943_state::_1943b_c007_r),this));
}
/* Game Drivers */
GAME( 1987, 1943, 0, _1943, 1943, _1943_state, init_1943, ROT270, "Capcom", "1943: The Battle of Midway (Euro)", MACHINE_SUPPORTS_SAVE )
GAME( 1987, 1943u, 1943, _1943, 1943, _1943_state, init_1943, ROT270, "Capcom", "1943: The Battle of Midway (US, Rev C)", MACHINE_SUPPORTS_SAVE )
GAME( 1987, 1943ua, 1943, _1943, 1943, _1943_state, init_1943, ROT270, "Capcom", "1943: The Battle of Midway (US)", MACHINE_SUPPORTS_SAVE )
GAME( 1987, 1943j, 1943, _1943, 1943, _1943_state, init_1943, ROT270, "Capcom", "1943: Midway Kaisen (Japan, Rev B)", MACHINE_SUPPORTS_SAVE )
GAME( 1987, 1943ja, 1943, _1943, 1943, _1943_state, init_1943, ROT270, "Capcom", "1943: Midway Kaisen (Japan)", MACHINE_SUPPORTS_SAVE )
GAME( 1987, 1943jah, 1943, _1943, 1943, _1943_state, init_1943, ROT270, "Capcom", "1943: Midway Kaisen (Japan, no protection hack)", MACHINE_SUPPORTS_SAVE )
GAME( 1987, 1943b, 1943, _1943, 1943, _1943_state, init_1943b, ROT270, "bootleg", "1943: Battle of Midway (bootleg, hack of Japan set)", MACHINE_SUPPORTS_SAVE )
GAME( 1987, 1943bj, 1943, _1943, 1943, _1943_state, init_1943b, ROT270, "bootleg", "1943: Midway Kaisen (bootleg)", MACHINE_SUPPORTS_SAVE )
GAME( 1987, 1943kai, 0, _1943, 1943, _1943_state, init_1943, ROT270, "Capcom", "1943 Kai: Midway Kaisen (Japan)", MACHINE_SUPPORTS_SAVE )
GAME( 1987, 1943mii, 0, _1943, 1943, _1943_state, init_1943, ROT270, "Capcom", "1943: The Battle of Midway Mark II (US)", MACHINE_SUPPORTS_SAVE )
GAME( 1987, 1943, 0, _1943, 1943, _1943_state, init_1943, ROT270, "Capcom", "1943: The Battle of Midway (Euro)", MACHINE_SUPPORTS_SAVE )
GAME( 1987, 1943u, 1943, _1943, 1943, _1943_state, init_1943, ROT270, "Capcom", "1943: The Battle of Midway (US, Rev C)", MACHINE_SUPPORTS_SAVE )
GAME( 1987, 1943ua, 1943, _1943, 1943, _1943_state, init_1943, ROT270, "Capcom", "1943: The Battle of Midway (US)", MACHINE_SUPPORTS_SAVE )
GAME( 1987, 1943j, 1943, _1943, 1943, _1943_state, init_1943, ROT270, "Capcom", "1943: Midway Kaisen (Japan, Rev B)", MACHINE_SUPPORTS_SAVE )
GAME( 1987, 1943ja, 1943, _1943, 1943, _1943_state, init_1943, ROT270, "Capcom", "1943: Midway Kaisen (Japan)", MACHINE_SUPPORTS_SAVE )
GAME( 1987, 1943jah, 1943, _1943, 1943, _1943_state, init_1943, ROT270, "Capcom", "1943: Midway Kaisen (Japan, no protection hack)", MACHINE_SUPPORTS_SAVE )
GAME( 1987, 1943b, 1943, _1943b, 1943, _1943_state, init_1943, ROT270, "bootleg", "1943: Battle of Midway (bootleg, hack of Japan set)", MACHINE_SUPPORTS_SAVE )
GAME( 1987, 1943bj, 1943, _1943b, 1943, _1943_state, init_1943, ROT270, "bootleg", "1943: Midway Kaisen (bootleg)", MACHINE_SUPPORTS_SAVE )
GAME( 1987, 1943kai, 0, _1943, 1943, _1943_state, init_1943, ROT270, "Capcom", "1943 Kai: Midway Kaisen (Japan)", MACHINE_SUPPORTS_SAVE )
GAME( 1987, 1943mii, 0, _1943, 1943, _1943_state, init_1943, ROT270, "Capcom", "1943: The Battle of Midway Mark II (US)", MACHINE_SUPPORTS_SAVE )

20
src/mame/includes/1943.h
View File

@ -10,6 +10,7 @@
#pragma once
#include "cpu/mcs51/mcs51.h"
#include "emupal.h"
#include "screen.h"
@ -19,6 +20,7 @@ public:
_1943_state(const machine_config &mconfig, device_type type, const char *tag) :
driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_mcu(*this, "mcu"),
m_videoram(*this, "videoram"),
m_colorram(*this, "colorram"),
m_scrollx(*this, "scrollx"),
@ -34,13 +36,14 @@ public:
{ }
void _1943(machine_config &config);
void _1943b(machine_config &config);
void init_1943b();
void init_1943();
private:
/* devices / memory pointers */
required_device<cpu_device> m_maincpu;
optional_device<i8751_device> m_mcu;
required_shared_ptr<u8> m_videoram;
required_shared_ptr<u8> m_colorram;
required_shared_ptr<u8> m_scrollx;
@ -64,10 +67,16 @@ private:
int m_bg2_on;
/* protection */
u8 m_prot_value;
void protection_w(u8 data);
u8 protection_r();
u8 _1943b_c007_r();
u8 m_cpu_to_mcu; // ls374 at 5k
u8 m_mcu_to_cpu; // ls374 at 6k
u8 m_audiocpu_to_mcu; // ls374 at 5l
u8 m_mcu_to_audiocpu; // ls374 at 6l
u8 m_mcu_p0;
u8 m_mcu_p2;
u8 m_mcu_p3;
INTERRUPT_GEN_MEMBER(mcu_irq);
void mcu_p3_w(u8 data);
void videoram_w(offs_t offset, u8 data);
void colorram_w(offs_t offset, u8 data);
@ -88,6 +97,7 @@ private:
void draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect);
void c1943_map(address_map &map);
void c1943b_map(address_map &map);
void sound_map(address_map &map);
};