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-rw-r--r--src/emu/dirom.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/emu/dirom.cpp b/src/emu/dirom.cpp
index a055ce00539..a59a1d6a4f9 100644
--- a/src/emu/dirom.cpp
+++ b/src/emu/dirom.cpp
@@ -35,7 +35,7 @@ void device_rom_interface::set_rom(const void *base, UINT32 size)
{
UINT32 mend = m_rom_config.addr_width() == 32 ? 0xffffffff : (1 << m_rom_config.addr_width()) - 1;
UINT32 rend = size-1;
- UINT32 banks = (rend+1) / (mend+1);
+ UINT32 banks = mend == 0xffffffff ? 1 : (rend+1) / (mend+1);
if(banks < 1)
banks = 1;
@@ -43,6 +43,7 @@ void device_rom_interface::set_rom(const void *base, UINT32 size)
space().install_read_bank(0, mend, device().tag());
m_bank = device().machine().memory().banks().find(device().tag())->second.get();
m_bank->configure_entries(0, banks, const_cast<void *>(base), mend+1);
+ m_cur_bank = 0;
} else {
// Round up to the nearest power-of-two-minus-one