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Fixed crash of dcat16 at start

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This commit is contained in:
Robbbert 2020-12-27 04:18:53 +11:00
parent fb911eb6be
commit c2f698a95f
1 changed files with 10 additions and 7 deletions
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17
src/mame/drivers/megadriv.cpp
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@ -297,12 +297,15 @@ void md_cons_state::machine_start()
void md_cons_state::install_cartslot()
{
// for now m_cartslot is only in MD and not 32x and SegaCD
m_maincpu->space(AS_PROGRAM).install_read_handler(0x000000, 0x7fffff, read16sm_delegate(*m_cart, FUNC(base_md_cart_slot_device::read)));
m_maincpu->space(AS_PROGRAM).install_write_handler(0x000000, 0x7fffff, write16s_delegate(*m_cart, FUNC(base_md_cart_slot_device::write)));
m_maincpu->space(AS_PROGRAM).install_readwrite_handler(0xa13000, 0xa130ff, read16sm_delegate(*m_cart, FUNC(base_md_cart_slot_device::read_a13)), write16sm_delegate(*m_cart, FUNC(base_md_cart_slot_device::write_a13)));
m_maincpu->space(AS_PROGRAM).install_readwrite_handler(0xa15000, 0xa150ff, read16sm_delegate(*m_cart, FUNC(base_md_cart_slot_device::read_a15)), write16sm_delegate(*m_cart, FUNC(base_md_cart_slot_device::write_a15)));
// m_maincpu->space(AS_PROGRAM).install_write_handler(0xa14000, 0xa14003, write16sm_delegate(*m_cart, FUNC(base_md_cart_slot_device::write_tmss_bank)));
if (m_cart)
{
// for now m_cartslot is only in MD and not 32x and SegaCD
m_maincpu->space(AS_PROGRAM).install_read_handler(0x000000, 0x7fffff, read16sm_delegate(*m_cart, FUNC(base_md_cart_slot_device::read)));
m_maincpu->space(AS_PROGRAM).install_write_handler(0x000000, 0x7fffff, write16s_delegate(*m_cart, FUNC(base_md_cart_slot_device::write)));
m_maincpu->space(AS_PROGRAM).install_readwrite_handler(0xa13000, 0xa130ff, read16sm_delegate(*m_cart, FUNC(base_md_cart_slot_device::read_a13)), write16sm_delegate(*m_cart, FUNC(base_md_cart_slot_device::write_a13)));
m_maincpu->space(AS_PROGRAM).install_readwrite_handler(0xa15000, 0xa150ff, read16sm_delegate(*m_cart, FUNC(base_md_cart_slot_device::read_a15)), write16sm_delegate(*m_cart, FUNC(base_md_cart_slot_device::write_a15)));
// m_maincpu->space(AS_PROGRAM).install_write_handler(0xa14000, 0xa14003, write16sm_delegate(*m_cart, FUNC(base_md_cart_slot_device::write_tmss_bank)));
}
}
uint16_t md_cons_state::tmss_r(offs_t offset)
@ -342,7 +345,7 @@ void md_cons_slot_state::machine_start()
md_cons_state::machine_start();
// the SVP introduces some kind of DMA 'lag', which we have to compensate for, this is obvious even on gfx DMAd from ROM (the Speedometer)
if (m_cart->get_type() == SEGA_SVP)
if (m_cart && (m_cart->get_type() == SEGA_SVP))
m_vdp->set_dma_delay(2);
if (m_tmss)