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-rw-r--r--src/mame/machine/aim65.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/machine/aim65.cpp b/src/mame/machine/aim65.cpp
index dd46bbeb965..7b09e752c7c 100644
--- a/src/mame/machine/aim65.cpp
+++ b/src/mame/machine/aim65.cpp
@@ -201,7 +201,7 @@ u8 aim65_state::z32_pb_r ()
d3 = kb/tty switch
*/
- uint8_t data = ioport("switches")->read();
+ uint8_t data = ioport("switches")->read() & 8;
m_kb_en = BIT(data, 3);
if (m_ca2)