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-rw-r--r--src/emu/dipty.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/emu/dipty.h b/src/emu/dipty.h
index cbb4a9cb725..c381420a0ca 100644
--- a/src/emu/dipty.h
+++ b/src/emu/dipty.h
@@ -27,6 +27,8 @@ public:
bool open(void);
void close(void);
+ bool is_open(void) const;
+
ssize_t read(UINT8 *rx_chars , size_t count);
void write(UINT8 tx_char);