SYSTEM MODULE ASCII; CONST ACK* = 06X; BS* = 08X; FF* = 0CX; HT* = 09X; LF* = 0AX; CR* = 0DX; EM* = 19X; FS* = 1CX; GS* = 1DX; VT* = 0BX; SO* = 0EX; SI* = 0FX; RS* = 1EX; SP* = 20X; US* = 1FX; DC1* = 11X; DC2* = 12X; DC3* = 13X; DC4* = 14X; CAN* = 18X; BEL* = 07X; DLE* = 10X; DEL* = 7FX; ETB* = 17X; ESC* = 1BX; ENQ* = 05X; NAK* = 15X; EOT* = 04X; ETX* = 03X; NUL* = 00X; SOH* = 01X; SUB* = 1AX; STX* = 02X; SYN* = 16X; END ASCII.