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-vsmile: Mask cartridge reads based on cartridge size. Fixes vsmile techart. [Ryan Holtz]

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This commit is contained in:
MooglyGuy 2019-01-15 16:36:06 +01:00
parent 2ead3aa7a8
commit f4d87b4fe8
1 changed files with 7 additions and 4 deletions
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11
src/mame/drivers/vsmile.cpp
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@ -54,6 +54,7 @@ public:
, m_io_colors(*this, "COLORS")
, m_io_buttons(*this, "BUTTONS")
, m_cart_region(nullptr)
, m_cart_addr_mask(0)
, m_uart_tx_timer(nullptr)
, m_pad_timer(nullptr)
, m_portb_data(0)
@ -129,6 +130,8 @@ private:
required_ioport m_io_buttons;
memory_region *m_cart_region;
uint32_t m_cart_addr_mask;
bool m_ctrl_cts[2];
bool m_ctrl_rts[2];
uint8_t m_ctrl_probe_history[2];
@ -201,22 +204,21 @@ void vsmile_state::device_timer(emu_timer &timer, device_timer_id id, int param,
READ16_MEMBER(vsmile_state::bank0_r)
{
return ((uint16_t*)m_cart_region->base())[offset];
return ((uint16_t*)m_cart_region->base())[offset & m_cart_addr_mask];
}
READ16_MEMBER(vsmile_state::bank1_r)
{
return ((uint16_t*)m_cart_region->base())[offset + 0x100000];
return ((uint16_t*)m_cart_region->base())[(offset + 0x100000) & m_cart_addr_mask];
}
READ16_MEMBER(vsmile_state::bank2_r)
{
return ((uint16_t*)m_cart_region->base())[offset + 0x200000];
return ((uint16_t*)m_cart_region->base())[(offset + 0x200000) & m_cart_addr_mask];
}
READ16_MEMBER(vsmile_state::bank3_r)
{
//return ((uint16_t*)m_cart_region->base())[offset + 0x300000];
return ((uint16_t*)m_system_region->base())[offset];
}
@ -294,6 +296,7 @@ void vsmile_state::machine_start()
{
std::string region_tag;
m_cart_region = memregion(region_tag.assign(m_cart->tag()).append(GENERIC_ROM_REGION_TAG).c_str());
m_cart_addr_mask = (m_cart_region->bytes() >> 1) - 1;
}
m_bankdev->set_bank(m_cart && m_cart->exists() ? 4 : 0);