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(MESS) pentagon.c: Start cutting down on the number of tagmap lookups. (nw)

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This commit is contained in:
Wilbert Pol 2013-01-24 22:17:58 +00:00
parent 11fc811eb7
commit 06f01ae4e7
1 changed files with 29 additions and 20 deletions
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49
src/mess/drivers/pentagon.c
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@ -13,17 +13,25 @@ class pentagon_state : public spectrum_state
{
public:
pentagon_state(const machine_config &mconfig, device_type type, const char *tag)
: spectrum_state(mconfig, type, tag) { }
: spectrum_state(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
{ }
DECLARE_DIRECT_UPDATE_MEMBER(pentagon_direct);
DECLARE_WRITE8_MEMBER(pentagon_port_7ffd_w);
DECLARE_MACHINE_RESET(pentagon);
protected:
required_device<cpu_device> m_maincpu;
UINT8 *m_maincpu_rom;
void pentagon_update_memory();
};
DIRECT_UPDATE_MEMBER(pentagon_state::pentagon_direct)
{
device_t *beta = machine().device(BETA_DISK_TAG);
UINT16 pc = machine().device("maincpu")->safe_pcbase();
UINT16 pc = m_maincpu->pcbase();
if (beta->started() && betadisk_is_active(beta))
{
@ -31,7 +39,7 @@ DIRECT_UPDATE_MEMBER(pentagon_state::pentagon_direct)
{
m_ROMSelection = ((m_port_7ffd_data>>4) & 0x01) ? 1 : 0;
betadisk_disable(beta);
membank("bank1")->set_base(memregion("maincpu")->base() + 0x010000 + (m_ROMSelection<<14));
membank("bank1")->set_base(m_maincpu_rom + 0x010000 + (m_ROMSelection<<14));
}
} else if (((pc & 0xff00) == 0x3d00) && (m_ROMSelection==1))
{
@ -48,38 +56,37 @@ DIRECT_UPDATE_MEMBER(pentagon_state::pentagon_direct)
membank("bank1")->set_base(machine().root_device().memregion("beta:beta")->base());
}
} else {
direct.explicit_configure(0x0000, 0x3fff, 0x3fff, machine().root_device().memregion("maincpu")->base() + 0x010000 + (m_ROMSelection<<14));
membank("bank1")->set_base(machine().root_device().memregion("maincpu")->base() + 0x010000 + (m_ROMSelection<<14));
direct.explicit_configure(0x0000, 0x3fff, 0x3fff, m_maincpu_rom + 0x010000 + (m_ROMSelection<<14));
membank("bank1")->set_base(m_maincpu_rom + 0x010000 + (m_ROMSelection<<14));
}
return ~0;
}
return address;
}
static void pentagon_update_memory(running_machine &machine)
void pentagon_state::pentagon_update_memory()
{
spectrum_state *state = machine.driver_data<spectrum_state>();
device_t *beta = machine.device(BETA_DISK_TAG);
UINT8 *messram = machine.device<ram_device>(RAM_TAG)->pointer();
state->m_screen_location = messram + ((state->m_port_7ffd_data & 8) ? (7<<14) : (5<<14));
device_t *beta = machine().device(BETA_DISK_TAG);
UINT8 *messram = machine().device<ram_device>(RAM_TAG)->pointer();
m_screen_location = messram + ((m_port_7ffd_data & 8) ? (7<<14) : (5<<14));
state->membank("bank4")->set_base(messram + ((state->m_port_7ffd_data & 0x07) * 0x4000));
membank("bank4")->set_base(messram + ((m_port_7ffd_data & 0x07) * 0x4000));
if (beta->started() && betadisk_is_active(beta) && !( state->m_port_7ffd_data & 0x10 ) )
if (beta->started() && betadisk_is_active(beta) && !( m_port_7ffd_data & 0x10 ) )
{
/* GLUK */
if (strcmp(machine.system().name, "pent1024")==0) {
state->m_ROMSelection = 2;
if (strcmp(machine().system().name, "pent1024")==0) {
m_ROMSelection = 2;
} else {
state->m_ROMSelection = ((state->m_port_7ffd_data>>4) & 0x01) ;
m_ROMSelection = ((m_port_7ffd_data>>4) & 0x01) ;
}
}
else {
/* ROM switching */
state->m_ROMSelection = ((state->m_port_7ffd_data>>4) & 0x01) ;
m_ROMSelection = ((m_port_7ffd_data>>4) & 0x01) ;
}
/* rom 0 is 128K rom, rom 1 is 48 BASIC */
state->membank("bank1")->set_base(machine.root_device().memregion("maincpu")->base() + 0x010000 + (state->m_ROMSelection<<14));
membank("bank1")->set_base(m_maincpu_rom + 0x010000 + (m_ROMSelection<<14));
}
WRITE8_MEMBER(pentagon_state::pentagon_port_7ffd_w)
@ -92,7 +99,7 @@ WRITE8_MEMBER(pentagon_state::pentagon_port_7ffd_w)
m_port_7ffd_data = data;
/* update memory */
pentagon_update_memory(machine());
pentagon_update_memory();
}
static ADDRESS_MAP_START (pentagon_io, AS_IO, 8, pentagon_state )
@ -112,7 +119,9 @@ MACHINE_RESET_MEMBER(pentagon_state,pentagon)
{
UINT8 *messram = machine().device<ram_device>(RAM_TAG)->pointer();
device_t *beta = machine().device(BETA_DISK_TAG);
address_space &space = machine().device("maincpu")->memory().space(AS_PROGRAM);
address_space &space = m_maincpu->space(AS_PROGRAM);
m_maincpu_rom = memregion("maincpu")->base();
space.install_read_bank(0x0000, 0x3fff, "bank1");
space.unmap_write(0x0000, 0x3fff);
@ -133,7 +142,7 @@ MACHINE_RESET_MEMBER(pentagon_state,pentagon)
m_port_7ffd_data = 0;
m_port_1ffd_data = -1;
pentagon_update_memory(machine());
pentagon_update_memory();
}
/* F4 Character Displayer */