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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 "rendlay.h"
#include "video/decospr.h" #include "video/decospr.h"
class backfire_state : public driver_device class backfire_state : public driver_device
{ {
public: public:
@ -30,7 +31,17 @@ public:
m_left_priority(*this, "left_priority"), m_left_priority(*this, "left_priority"),
m_right_priority(*this, "right_priority"), m_right_priority(*this, "right_priority"),
m_sprgen(*this, "spritegen"), 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 */ /* memory pointers */
@ -47,13 +58,13 @@ public:
bitmap_ind16 *m_right; bitmap_ind16 *m_right;
/* devices */ /* devices */
cpu_device *m_maincpu; required_device<cpu_device> m_maincpu;
device_t *m_deco_tilegen1; required_device<device_t> m_deco_tilegen1;
device_t *m_deco_tilegen2; required_device<device_t> m_deco_tilegen2;
device_t *m_lscreen; required_device<device_t> m_lscreen;
device_t *m_rscreen; required_device<device_t> m_rscreen;
eeprom_device *m_eeprom; required_device<eeprom_device> m_eeprom;
/* memory */ /* memory */
UINT16 m_pf1_rowscroll[0x0800/2]; 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); UINT32 screen_update_backfire_right(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
INTERRUPT_GEN_MEMBER(deco32_vbl_interrupt); INTERRUPT_GEN_MEMBER(deco32_vbl_interrupt);
void descramble_sound(); 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; //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) 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 */ /* some kind of screen indicator? checked by backfirea set before it will boot */
int backfire_screen = machine().rand() & 1; int backfire_screen = machine().rand() & 1;
eeprom_device *eeprom = downcast<eeprom_device *>(device); return ((m_eeprom->read_bit() << 24) | m_io_in0->read()
return ((eeprom->read_bit() << 24) | machine().root_device().ioport("IN0")->read() | ((m_io_in2->read() & 0xbf) << 16)
| ((machine().root_device().ioport("IN2")->read() & 0xbf) << 16) | ((m_io_in3->read() & 0x40) << 16)) ^ (backfire_screen << 26) ;
| ((machine().root_device().ioport("IN3")->read() & 0x40) << 16)) ^ (backfire_screen << 26) ;
} }
READ32_MEMBER(backfire_state::backfire_control2_r) READ32_MEMBER(backfire_state::backfire_control2_r)
{ {
// logerror("%08x:Read eprom %08x (%08x)\n", space.device().safe_pc(), offset << 1, mem_mask); // 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 #ifdef UNUSED_FUNCTION
READ32_MEMBER(backfire_state::backfire_control3_r) READ32_MEMBER(backfire_state::backfire_control3_r)
{ {
// logerror("%08x:Read eprom %08x (%08x)\n", space.device().safe_pc(), offset << 1, mem_mask); // 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 #endif
WRITE32_MEMBER(backfire_state::backfire_eeprom_w) 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); logerror("%s:write eprom %08x (%08x) %08x\n",machine().describe_context(),offset<<1,mem_mask,data);
if (ACCESSING_BITS_0_7) if (ACCESSING_BITS_0_7)
{ {
eeprom_device *eeprom = downcast<eeprom_device *>(device); m_eeprom->set_clock_line(BIT(data, 1) ? ASSERT_LINE : CLEAR_LINE);
eeprom->set_clock_line(BIT(data, 1) ? ASSERT_LINE : CLEAR_LINE); m_eeprom->write_bit(BIT(data, 0));
eeprom->write_bit(BIT(data, 0)); m_eeprom->set_cs_line(BIT(data, 2) ? CLEAR_LINE : ASSERT_LINE);
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() 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) 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(), "gfx1"); /* 141 */
deco56_decrypt_gfx(machine(), "gfx2"); /* 141 */ deco56_decrypt_gfx(machine(), "gfx2"); /* 141 */
deco156_decrypt(machine()); 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(); 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 ) GAME( 1995, backfire, 0, backfire, backfire, backfire_state, backfire, ROT0, "Data East Corporation", "Backfire! (set 1)", GAME_SUPPORTS_SAVE )