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backfire.c: Reduce tagmap lookups (nw)

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This commit is contained in:
Wilbert Pol 2013-02-11 22:09:11 +00:00
parent 807fecec81
commit dd20508cd7
1 changed files with 33 additions and 27 deletions
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60
src/mame/drivers/backfire.c
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@ -21,6 +21,7 @@
#include "rendlay.h"
#include "video/decospr.h"
class backfire_state : public driver_device
{
public:
@ -30,7 +31,17 @@ public:
m_left_priority(*this, "left_priority"),
m_right_priority(*this, "right_priority"),
m_sprgen(*this, "spritegen"),
m_sprgen2(*this, "spritegen2")
m_sprgen2(*this, "spritegen2"),
m_maincpu(*this, "maincpu"),
m_deco_tilegen1(*this, "tilegen1"),
m_deco_tilegen2(*this, "tilegen2"),
m_lscreen(*this, "lscreen"),
m_rscreen(*this, "rscreen"),
m_eeprom(*this, "eeprom"),
m_io_in0(*this, "IN0"),
m_io_in1(*this, "IN1"),
m_io_in2(*this, "IN2"),
m_io_in3(*this, "IN3")
{ }
/* memory pointers */
@ -47,13 +58,13 @@ public:
bitmap_ind16 *m_right;
/* devices */
cpu_device *m_maincpu;
device_t *m_deco_tilegen1;
device_t *m_deco_tilegen2;
required_device<cpu_device> m_maincpu;
required_device<device_t> m_deco_tilegen1;
required_device<device_t> m_deco_tilegen2;
device_t *m_lscreen;
device_t *m_rscreen;
eeprom_device *m_eeprom;
required_device<device_t> m_lscreen;
required_device<device_t> m_rscreen;
required_device<eeprom_device> m_eeprom;
/* memory */
UINT16 m_pf1_rowscroll[0x0800/2];
@ -88,6 +99,11 @@ public:
UINT32 screen_update_backfire_right(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
INTERRUPT_GEN_MEMBER(deco32_vbl_interrupt);
void descramble_sound();
required_ioport m_io_in0;
required_ioport m_io_in1;
required_ioport m_io_in2;
required_ioport m_io_in3;
};
//UINT32 *backfire_180010, *backfire_188010;
@ -182,40 +198,36 @@ UINT32 backfire_state::screen_update_backfire_right(screen_device &screen, bitma
READ32_MEMBER(backfire_state::backfire_eeprom_r)
{
device_t *device = machine().device("eeprom");
/* some kind of screen indicator? checked by backfirea set before it will boot */
int backfire_screen = machine().rand() & 1;
eeprom_device *eeprom = downcast<eeprom_device *>(device);
return ((eeprom->read_bit() << 24) | machine().root_device().ioport("IN0")->read()
| ((machine().root_device().ioport("IN2")->read() & 0xbf) << 16)
| ((machine().root_device().ioport("IN3")->read() & 0x40) << 16)) ^ (backfire_screen << 26) ;
return ((m_eeprom->read_bit() << 24) | m_io_in0->read()
| ((m_io_in2->read() & 0xbf) << 16)
| ((m_io_in3->read() & 0x40) << 16)) ^ (backfire_screen << 26) ;
}
READ32_MEMBER(backfire_state::backfire_control2_r)
{
// logerror("%08x:Read eprom %08x (%08x)\n", space.device().safe_pc(), offset << 1, mem_mask);
return (m_eeprom->read_bit() << 24) | ioport("IN1")->read() | (ioport("IN1")->read() << 16);
return (m_eeprom->read_bit() << 24) | m_io_in1->read() | (m_io_in1->read() << 16);
}
#ifdef UNUSED_FUNCTION
READ32_MEMBER(backfire_state::backfire_control3_r)
{
// logerror("%08x:Read eprom %08x (%08x)\n", space.device().safe_pc(), offset << 1, mem_mask);
return (m_eeprom->read_bit() << 24) | ioport("IN2")->read() | (ioport("IN2")->read() << 16);
return (m_eeprom->read_bit() << 24) | m_io_in2->read() | (m_io_in2->read() << 16);
}
#endif
WRITE32_MEMBER(backfire_state::backfire_eeprom_w)
{
device_t *device = machine().device("eeprom");
logerror("%s:write eprom %08x (%08x) %08x\n",machine().describe_context(),offset<<1,mem_mask,data);
if (ACCESSING_BITS_0_7)
{
eeprom_device *eeprom = downcast<eeprom_device *>(device);
eeprom->set_clock_line(BIT(data, 1) ? ASSERT_LINE : CLEAR_LINE);
eeprom->write_bit(BIT(data, 0));
eeprom->set_cs_line(BIT(data, 2) ? CLEAR_LINE : ASSERT_LINE);
m_eeprom->set_clock_line(BIT(data, 1) ? ASSERT_LINE : CLEAR_LINE);
m_eeprom->write_bit(BIT(data, 0));
m_eeprom->set_cs_line(BIT(data, 2) ? CLEAR_LINE : ASSERT_LINE);
}
}
@ -476,12 +488,6 @@ static const deco16ic_interface backfire_deco16ic_tilegen2_intf =
void backfire_state::machine_start()
{
m_maincpu = machine().device<cpu_device>("maincpu");
m_deco_tilegen1 = machine().device("tilegen1");
m_deco_tilegen2 = machine().device("tilegen2");
m_lscreen = machine().device("lscreen");
m_rscreen = machine().device("rscreen");
m_eeprom = machine().device<eeprom_device>("eeprom");
}
UINT16 backfire_pri_callback(UINT16 x)
@ -711,9 +717,9 @@ DRIVER_INIT_MEMBER(backfire_state,backfire)
deco56_decrypt_gfx(machine(), "gfx1"); /* 141 */
deco56_decrypt_gfx(machine(), "gfx2"); /* 141 */
deco156_decrypt(machine());
machine().device("maincpu")->set_clock_scale(4.0f); /* core timings aren't accurate */
m_maincpu->set_clock_scale(4.0f); /* core timings aren't accurate */
descramble_sound();
machine().device("maincpu")->memory().space(AS_PROGRAM).install_read_handler(0x0170018, 0x017001b, read32_delegate(FUNC(backfire_state::backfire_speedup_r), this));
m_maincpu->space(AS_PROGRAM).install_read_handler(0x0170018, 0x017001b, read32_delegate(FUNC(backfire_state::backfire_speedup_r), this));
}
GAME( 1995, backfire, 0, backfire, backfire, backfire_state, backfire, ROT0, "Data East Corporation", "Backfire! (set 1)", GAME_SUPPORTS_SAVE )