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-rw-r--r--src/devices/bus/ti99/internal/992board.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/devices/bus/ti99/internal/992board.h b/src/devices/bus/ti99/internal/992board.h
index 7e79c8d1358..786aed36381 100644
--- a/src/devices/bus/ti99/internal/992board.h
+++ b/src/devices/bus/ti99/internal/992board.h
@@ -137,6 +137,9 @@ private:
// Hexbus inhibit. This prevents the incoming latches to store the data.
bool m_communication_disable;
+
+ // Bit 6. It is not documented, but likely to indicate the response phase.
+ bool m_response_phase;
};