1 files changed, 2 insertions, 0 deletions
diff --git a/c/gbos.h b/c/gbos.h
index d207a75..df52fbe 100644
--- a/c/gbos.h
+++ b/c/gbos.h
@@ -15,6 +15,8 @@ unsigned char getpid(void);
 unsigned char pipe(void);         /* -> read fd; write end is read+1 */
 void          ssend(unsigned char b);   /* link-port: transmit one byte */
 unsigned char srecv(void);              /* link-port: receive one byte (blocks) */
+int           srecv_nb(void);           /* link-port: receive, or -1 if none */
+unsigned char pollin(void);             /* poll OSK for a typed char, or 0 */
 
 /* helpers (c/libc.c) */
 void          putu(unsigned int n);              /* print decimal          */