1 files changed, 2 insertions, 0 deletions
diff --git a/src/gb.h b/src/gb.h
index 7439615..7218648 100644
--- a/src/gb.h
+++ b/src/gb.h
@@ -114,6 +114,8 @@ struct GB {
 
     u64 cycles;        // total T-cycles elapsed
     bool serial_log;   // print serial output to stderr (blargg tests)
+    int  serial_out_fd; // if >=0, transmitted serial bytes written here (stdout)
+    int  serial_in_fd;  // if >=0, received serial bytes read here (stdin), else 0xFF
 };
 
 void gb_init(GB *gb);