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Diffstat (limited to 'src/mess/drivers/gamate.c')
-rw-r--r--src/mess/drivers/gamate.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/src/mess/drivers/gamate.c b/src/mess/drivers/gamate.c
index c246c790ea7..cc18fa3ba98 100644
--- a/src/mess/drivers/gamate.c
+++ b/src/mess/drivers/gamate.c
@@ -85,6 +85,7 @@ private:
emu_timer *timer1;
emu_timer *timer2;
UINT8 bank_multi;
+ UINT8 *m_cart_ptr;
};
WRITE8_MEMBER( gamate_state::gamate_cart_protection_w )
@@ -96,7 +97,7 @@ WRITE8_MEMBER( gamate_state::gamate_cart_protection_w )
card_protection.failed= card_protection.failed || ((card_protection.cartridge_byte&0x80)!=0) != ((data&4)!=0);
card_protection.bit_shifter++;
if (card_protection.bit_shifter>=8) {
- card_protection.cartridge_byte=m_cart->get_rom_base()[card_protection.address++];
+ card_protection.cartridge_byte=m_cart_ptr[card_protection.address++];
card_protection.bit_shifter=0;
}
break;
@@ -107,7 +108,7 @@ READ8_MEMBER( gamate_state::gamate_cart_protection_r )
UINT8 ret=1;
if (card_protection.bit_shifter==7 && card_protection.unprotected) {
- ret=m_cart->get_rom_base()[bank_multi*0x4000];
+ ret=m_cart_ptr[bank_multi*0x4000];
} else {
card_protection.bit_shifter++;
if (card_protection.bit_shifter==8) {
@@ -132,7 +133,7 @@ WRITE8_MEMBER( gamate_state::protection_reset )
// writes 0x20
card_protection.address=0x6005-0x6001;
card_protection.bit_shifter=0;
- card_protection.cartridge_byte=m_cart->get_rom_base()[card_protection.address++];//m_cart_rom[card_protection.address++];
+ card_protection.cartridge_byte=m_cart_ptr[card_protection.address++];//m_cart_rom[card_protection.address++];
card_protection.failed=false;
card_protection.unprotected=false;
}
@@ -172,12 +173,12 @@ WRITE8_MEMBER( gamate_state::gamate_video_w )
WRITE8_MEMBER( gamate_state::cart_bankswitchmulti_w )
{
bank_multi=data;
- membank("bankmulti")->set_base(m_cart->get_rom_base()+0x4000*data+1);
+ membank("bankmulti")->set_base(m_cart_ptr+0x4000*data+1);
}
WRITE8_MEMBER( gamate_state::cart_bankswitch_w )
{
- membank("bank")->set_base(m_cart->get_rom_base()+0x4000*data);
+ membank("bank")->set_base(m_cart_ptr+0x4000*data);
}
READ8_MEMBER( gamate_state::gamate_video_r )
@@ -329,8 +330,10 @@ DRIVER_INIT_MEMBER(gamate_state,gamate)
void gamate_state::machine_start()
{
+ m_cart_ptr = memregion("maincpu")->base() + 0x6000;
if (m_cart->exists()) {
// m_maincpu->space(AS_PROGRAM).install_read_handler(0x6000, 0x6000, READ8_DELEGATE(gamate_state, gamate_cart_protection_r));
+ m_cart_ptr = m_cart->get_rom_base();
membank("bankmulti")->set_base(m_cart->get_rom_base()+1);
membank("bank")->set_base(m_cart->get_rom_base()+0x4000); // bankswitched games in reality no offset
}