#define A_EOF	'\032'  /* 0x1A ^Z end-of-file          */

#define A_NUL	'\000'  /* 0x00 ^@ null                 */
#define A_SOH	'\001'  /* 0x01 ^A start of heading     */
#define A_STX	'\002'  /* 0x02 ^B start of text        */
#define A_ETX	'\003'  /* 0x03 ^C end of text          */
#define A_EOT	'\004'  /* 0x04 ^D end of transmission  */
#define A_ENQ	'\005'  /* 0x05 ^E enquiry              */
#define A_ACK	'\006'  /* 0x06 ^F acknowledge          */
#define A_BEL	'\007'  /* 0x07 ^G bell              \a */
#define A_BS	'\010'  /* 0x08 ^H backspace         \b */
#define A_HT	'\011'  /* 0x09 ^I horizontal tab    \t */
#define A_LF	'\012'  /* 0x0A ^J line feed         \n */
#define A_VT	'\013'  /* 0x0B ^K vertical tab      \v */
#define A_FF	'\014'  /* 0x0C ^L form feed         \f */
#define A_CR	'\015'  /* 0x0D ^M carriage return   \r */
#define A_SO	'\016'  /* 0x0E ^N shift out            */
#define A_SI	'\017'  /* 0x0F ^O shift in             */
#define A_DLE	'\020'  /* 0x10 ^P data link escape     */
#define A_DC1	'\021'  /* 0x11 ^Q device control: xon  */
#define A_DC2	'\022'  /* 0x12 ^R device control: 2    */
#define A_DC3	'\023'  /* 0x13 ^S device control: xoff */
#define A_DC4	'\024'  /* 0x14 ^T device control: 4    */
#define A_NAK	'\025'  /* 0x15 ^U negative acknowledge */
#define A_SYN	'\026'  /* 0x16 ^V synchronous idle     */
#define A_ETB	'\027'  /* 0x17 ^W end of trans. block  */
#define A_CAN	'\030'  /* 0x18 ^X cancel (void data)   */
#define A_EM	'\031'  /* 0x19 ^Y end of medium        */
#define A_SUB	'\032'  /* 0x1A ^Z substitute           */
#define A_ESC	'\033'  /* 0x1B ^[ escape               */
#define A_FS	'\034'  /* 0x1C ^\ file separator   EOF */
#define A_GS	'\035'  /* 0x1D ^] group separator  EOG */
#define A_RS	'\036'  /* 0x1E ^^ record separator EOR */
#define A_US	'\037'  /* 0x1F ^_ unit/field separator */

#define A_DEL	'\177'  /* 0x7F    delete               */