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some notes, cleanups, accuracy improvements

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This commit is contained in:
Michaël Banaan Ananas 2011-11-12 19:56:23 +00:00
parent 08d47383fa
commit a2c8d6832f
1 changed files with 58 additions and 69 deletions
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123
src/mame/drivers/pengadvb.c
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@ -1,11 +1,13 @@
/* /*
Penguin Adventure bootleg Penguin Adventure bootleg (tagged 'Screen', 1988)
Original release was on MSX, by Konami in 1986. There is no official arcade release of this game.
Driver by Mariusz Wojcieszek Driver by Mariusz Wojcieszek
This seems to be the MSX version possibly hacked This seems to be the MSX version hacked to run on cheap Korean(?) bootleg hardware.
to run on cheap Korean bootleg hardware. Bosses are at wrong stages when compared to the original, probably to make the game more
difficult early on. This is also the cause of some gfx glitches when reaching a boss.
Basic components include..... Basic components include.....
Z80 @ 3.579533MHz [10.7386/3] Z80 @ 3.579533MHz [10.7386/3]
@ -15,7 +17,7 @@ AY-3-8910 @ 1.789766MHz [10.7386/6]
4416 RAM x2 4416 RAM x2
4164 RAM x8 4164 RAM x8
10.7386 XTAL 10.7386 XTAL
10 position DIPSW 10 position DIPSW (where are they read??)
NOTE! switches 1, 3 & 5 must be ON or the game will not boot. NOTE! switches 1, 3 & 5 must be ON or the game will not boot.
*/ */
@ -42,96 +44,82 @@ public:
static void mem_map_banks(running_machine &machine) static void mem_map_banks(running_machine &machine)
{ {
pengadvb_state *state = machine.driver_data<pengadvb_state>(); pengadvb_state *state = machine.driver_data<pengadvb_state>();
int slot_select; /* memorymap: (rest is assumed unmapped)
slot 0
0000-7fff BIOS ROM
slot 1
4000-bfff game ROM
slot 3
c000-ffff RAM
*/
// page 0 // page 0 (0000-3fff)
slot_select = (state->m_mem_map >> 0) & 0x03; switch(state->m_mem_map & 3)
switch(slot_select)
{ {
case 0: case 0:
{ // BIOS
machine.device("maincpu")->memory().space(AS_PROGRAM)->install_read_bank(0x0000, 0x3fff, "bank1" ); machine.device("maincpu")->memory().space(AS_PROGRAM)->install_read_bank(0x0000, 0x3fff, "bank1" );
memory_set_bankptr(machine, "bank1", machine.region("maincpu")->base()); memory_set_bankptr(machine, "bank1", machine.region("maincpu")->base());
break; break;
};
case 1: default:
case 2:
case 3:
{
machine.device("maincpu")->memory().space(AS_PROGRAM)->unmap_read(0x0000, 0x3fff); machine.device("maincpu")->memory().space(AS_PROGRAM)->unmap_read(0x0000, 0x3fff);
break; break;
} }
}
// page 1 // page 1 (4000-7fff)
slot_select = (state->m_mem_map >> 2) & 0x03; switch(state->m_mem_map >> 2 & 3)
switch(slot_select)
{ {
case 0: case 0:
{ // BIOS
machine.device("maincpu")->memory().space(AS_PROGRAM)->install_read_bank(0x4000, 0x5fff, "bank21" ); machine.device("maincpu")->memory().space(AS_PROGRAM)->install_read_bank(0x4000, 0x5fff, "bank21" );
machine.device("maincpu")->memory().space(AS_PROGRAM)->install_read_bank(0x6000, 0x7fff, "bank22" ); machine.device("maincpu")->memory().space(AS_PROGRAM)->install_read_bank(0x6000, 0x7fff, "bank22" );
memory_set_bankptr(machine, "bank21", machine.region("maincpu")->base() + 0x4000); memory_set_bankptr(machine, "bank21", machine.region("maincpu")->base() + 0x4000);
memory_set_bankptr(machine, "bank22", machine.region("maincpu")->base() + 0x4000 + 0x2000); memory_set_bankptr(machine, "bank22", machine.region("maincpu")->base() + 0x4000 + 0x2000);
break; break;
}
case 1: case 1:
{ // game
machine.device("maincpu")->memory().space(AS_PROGRAM)->install_read_bank(0x4000, 0x5fff, "bank21" ); machine.device("maincpu")->memory().space(AS_PROGRAM)->install_read_bank(0x4000, 0x5fff, "bank21" );
machine.device("maincpu")->memory().space(AS_PROGRAM)->install_read_bank(0x6000, 0x7fff, "bank22" ); machine.device("maincpu")->memory().space(AS_PROGRAM)->install_read_bank(0x6000, 0x7fff, "bank22" );
memory_set_bankptr(machine, "bank21", machine.region("game")->base() + state->m_mem_banks[0]*0x2000); memory_set_bankptr(machine, "bank21", machine.region("game")->base() + state->m_mem_banks[0]*0x2000);
memory_set_bankptr(machine, "bank22", machine.region("game")->base() + state->m_mem_banks[1]*0x2000); memory_set_bankptr(machine, "bank22", machine.region("game")->base() + state->m_mem_banks[1]*0x2000);
break; break;
}
case 2: default:
case 3:
{
machine.device("maincpu")->memory().space(AS_PROGRAM)->unmap_read(0x4000, 0x7fff); machine.device("maincpu")->memory().space(AS_PROGRAM)->unmap_read(0x4000, 0x7fff);
break; break;
} }
}
// page 2 // page 2 (8000-bfff)
slot_select = (state->m_mem_map >> 4) & 0x03; switch(state->m_mem_map >> 4 & 3)
switch(slot_select)
{ {
case 1: case 1:
{ // game
machine.device("maincpu")->memory().space(AS_PROGRAM)->install_read_bank(0x8000, 0x9fff, "bank31" ); machine.device("maincpu")->memory().space(AS_PROGRAM)->install_read_bank(0x8000, 0x9fff, "bank31" );
machine.device("maincpu")->memory().space(AS_PROGRAM)->install_read_bank(0xa000, 0xbfff, "bank32" ); machine.device("maincpu")->memory().space(AS_PROGRAM)->install_read_bank(0xa000, 0xbfff, "bank32" );
memory_set_bankptr(machine, "bank31", machine.region("game")->base() + state->m_mem_banks[2]*0x2000); memory_set_bankptr(machine, "bank31", machine.region("game")->base() + state->m_mem_banks[2]*0x2000);
memory_set_bankptr(machine, "bank32", machine.region("game")->base() + state->m_mem_banks[3]*0x2000); memory_set_bankptr(machine, "bank32", machine.region("game")->base() + state->m_mem_banks[3]*0x2000);
break; break;
}
case 0: default:
case 2:
case 3:
{
machine.device("maincpu")->memory().space(AS_PROGRAM)->unmap_read(0x8000, 0xbfff); machine.device("maincpu")->memory().space(AS_PROGRAM)->unmap_read(0x8000, 0xbfff);
break; break;
} }
}
// page 3 // page 3 (c000-ffff)
slot_select = (state->m_mem_map >> 6) & 0x03; switch(state->m_mem_map >> 6 & 3)
switch(slot_select)
{ {
case 0:
case 1:
case 2:
{
machine.device("maincpu")->memory().space(AS_PROGRAM)->unmap_read(0xc000, 0xffff);
break;
}
case 3: case 3:
{ // RAM
machine.device("maincpu")->memory().space(AS_PROGRAM)->install_read_bank(0xc000, 0xffff, "bank4" ); machine.device("maincpu")->memory().space(AS_PROGRAM)->install_read_bank(0xc000, 0xffff, "bank4" );
memory_set_bankptr(machine, "bank4", state->m_main_mem); memory_set_bankptr(machine, "bank4", state->m_main_mem);
break; break;
}
}
default:
machine.device("maincpu")->memory().space(AS_PROGRAM)->unmap_read(0xc000, 0xffff);
break;
}
} }
static WRITE8_HANDLER(mem_w) static WRITE8_HANDLER(mem_w)
@ -139,22 +127,15 @@ static WRITE8_HANDLER(mem_w)
pengadvb_state *state = space->machine().driver_data<pengadvb_state>(); pengadvb_state *state = space->machine().driver_data<pengadvb_state>();
if (offset >= 0xc000) if (offset >= 0xc000)
{ {
int slot_select = (state->m_mem_map >> 6) & 0x03; // write to RAM
if ((state->m_mem_map >> 6 & 3) == 3)
if ( slot_select == 3 )
{
state->m_main_mem[offset - 0xc000] = data; state->m_main_mem[offset - 0xc000] = data;
} }
} else if (offset >= 0x4000 && (state->m_mem_map >> (offset >> 13 & 6) & 3) == 1 && (state->m_mem_banks[(offset - 0x4000) >> 13] != (data & 0xf)))
else
{ {
switch(offset) // ROM bankswitch
{ state->m_mem_banks[(offset - 0x4000) >> 13] = data & 0xf;
case 0x4000: state->m_mem_banks[0] = data; mem_map_banks(space->machine()); break; mem_map_banks(space->machine());
case 0x6000: state->m_mem_banks[1] = data; mem_map_banks(space->machine()); break;
case 0x8000: state->m_mem_banks[2] = data; mem_map_banks(space->machine()); break;
case 0xa000: state->m_mem_banks[3] = data; mem_map_banks(space->machine()); break;
}
} }
} }
@ -210,11 +191,20 @@ static const ay8910_interface pengadvb_ay8910_interface =
DEVCB_NULL DEVCB_NULL
}; };
static READ8_DEVICE_HANDLER( pengadvb_ppi_port_a_r )
{
pengadvb_state *state = device->machine().driver_data<pengadvb_state>();
return state->m_mem_map;
}
static WRITE8_DEVICE_HANDLER ( pengadvb_ppi_port_a_w ) static WRITE8_DEVICE_HANDLER ( pengadvb_ppi_port_a_w )
{ {
pengadvb_state *state = device->machine().driver_data<pengadvb_state>(); pengadvb_state *state = device->machine().driver_data<pengadvb_state>();
if (data != state->m_mem_map)
{
state->m_mem_map = data; state->m_mem_map = data;
mem_map_banks(device->machine()); mem_map_banks(device->machine());
}
} }
static READ8_DEVICE_HANDLER( pengadvb_ppi_port_b_r ) static READ8_DEVICE_HANDLER( pengadvb_ppi_port_b_r )
@ -229,7 +219,7 @@ static READ8_DEVICE_HANDLER( pengadvb_ppi_port_b_r )
static I8255A_INTERFACE(pengadvb_ppi8255_interface) static I8255A_INTERFACE(pengadvb_ppi8255_interface)
{ {
DEVCB_NULL, DEVCB_HANDLER(pengadvb_ppi_port_a_r),
DEVCB_HANDLER(pengadvb_ppi_port_a_w), DEVCB_HANDLER(pengadvb_ppi_port_a_w),
DEVCB_HANDLER(pengadvb_ppi_port_b_r), DEVCB_HANDLER(pengadvb_ppi_port_b_r),
DEVCB_NULL, DEVCB_NULL,
@ -239,7 +229,7 @@ static I8255A_INTERFACE(pengadvb_ppi8255_interface)
static WRITE_LINE_DEVICE_HANDLER(vdp_interrupt) static WRITE_LINE_DEVICE_HANDLER(vdp_interrupt)
{ {
cputag_set_input_line(device->machine(), "maincpu", 0, (state ? HOLD_LINE : CLEAR_LINE)); cputag_set_input_line(device->machine(), "maincpu", 0, (state ? ASSERT_LINE : CLEAR_LINE));
} }
static TMS9928A_INTERFACE(pengadvb_tms9928a_interface) static TMS9928A_INTERFACE(pengadvb_tms9928a_interface)
@ -326,7 +316,6 @@ static void pengadvb_decrypt(running_machine &machine, const char* region)
mem[i] = buf[BITSWAP24(i,23,22,21,20,19,18,17,16,15,14,13,5,11,10,9,8,7,6,12,4,3,2,1,0)]; mem[i] = buf[BITSWAP24(i,23,22,21,20,19,18,17,16,15,14,13,5,11,10,9,8,7,6,12,4,3,2,1,0)];
} }
auto_free(machine, buf); auto_free(machine, buf);
} }
static DRIVER_INIT(pengadvb) static DRIVER_INIT(pengadvb)
@ -350,4 +339,4 @@ ROM_START( pengadvb )
ROM_END ROM_END
GAME( 1988, pengadvb, 0, pengadvb, pengadvb, pengadvb, ROT0, "bootleg / Konami", "Penguin Adventure (bootleg of MSX version)", GAME_SUPPORTS_SAVE ) GAME( 1988, pengadvb, 0, pengadvb, pengadvb, pengadvb, ROT0, "bootleg (Screen) / Konami", "Penguin Adventure (bootleg of MSX version)", GAME_SUPPORTS_SAVE )