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Diffstat (limited to 'src/devices/bus/a2bus/grapplerplus.cpp')
-rw-r--r--src/devices/bus/a2bus/grapplerplus.cpp10
1 files changed, 10 insertions, 0 deletions
diff --git a/src/devices/bus/a2bus/grapplerplus.cpp b/src/devices/bus/a2bus/grapplerplus.cpp
index 8de41067385..99e0f69f78f 100644
--- a/src/devices/bus/a2bus/grapplerplus.cpp
+++ b/src/devices/bus/a2bus/grapplerplus.cpp
@@ -191,6 +191,16 @@ u8 a2bus_grapplerplus_device::read_cnxx(u8 offset)
}
+void a2bus_grapplerplus_device::write_cnxx(u8 offset, u8 data)
+{
+ LOG("Write Cn%02X=%02X (bus conflict)\n", offset, data);
+
+ if (m_rom_bank)
+ LOG("Select low ROM bank\n");
+ m_rom_bank = 0x0000U;
+}
+
+
u8 a2bus_grapplerplus_device::read_c800(u16 offset)
{
return m_rom[(offset & 0x07ffU) | m_rom_bank];