X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=src%2Fcore%2Fao.h;h=54018b371a058d60ba888b8020c45bbbda41d70f;hp=81d92e72b2d512483b4640a08cf9c1651a2abab3;hb=0b65402361f36a0c722977bcb63edb26fda0db28;hpb=f74d724f92b335d6c0674d0f1fcc650b729401df

diff --git a/src/core/ao.h b/src/core/ao.h
index 81d92e72..54018b37 100644
--- a/src/core/ao.h
+++ b/src/core/ao.h
@@ -170,6 +170,10 @@ ao_cmd_hex(void);
 void
 ao_cmd_decimal(void);
 
+/* Read a single hex nibble off stdin. */
+uint8_t
+ao_getnibble(void);
+
 uint8_t
 ao_match_word(__code char *word);
 
@@ -595,10 +599,10 @@ ao_monitor_init(void) __reentrant;
  * ao_stdio.c
  */
 
-#define AO_READ_AGAIN	((char) -1)
+#define AO_READ_AGAIN	(-1)
 
 struct ao_stdio {
-	char	(*pollchar)(void);
+	int	(*pollchar)(void);
 	void	(*putchar)(char c) __reentrant;
 	void	(*flush)(void);
 	uint8_t	echo;
@@ -617,7 +621,7 @@ uint8_t
 ao_echo(void);
 
 int8_t
-ao_add_stdio(char (*pollchar)(void),
+ao_add_stdio(int (*pollchar)(void),
 	     void (*putchar)(char) __reentrant,
 	     void (*flush)(void)) __reentrant;