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-rw-r--r--src/devices/bus/spectrum/mikroplus.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/devices/bus/spectrum/mikroplus.cpp b/src/devices/bus/spectrum/mikroplus.cpp
index 87552f79bf3..04ce942c632 100644
--- a/src/devices/bus/spectrum/mikroplus.cpp
+++ b/src/devices/bus/spectrum/mikroplus.cpp
@@ -93,7 +93,7 @@ uint8_t spectrum_mikroplus_device::iorq_r(offs_t offset)
{
uint8_t data = 0xff;
- if (offset == 0xdf)
+ if ((offset & 0xff) == 0xdf)
{
data = m_joy->read() | (0xff ^ 0x1f);
}