The ASCII module.

The module 'ASCII' is the home of the special characters of the ASCII characterset. Constants like 'LF', 'CR', 'EOF' are defined here. When the construct 'IMPORT ASCII;' is in the sourcefile, the constants can be referred to as 'ASCII.LF', to name only one.
I made this module after being inspired by the FST library. Thanks Roger...

DEFINITION MODULE ASCII;

(*     Borrowed from:
       (C) Copyright 1987,1988
       Fitted Software Tools.
       All rights reserved.   		*)

CONST      (* standard ASCII control character names *)
    nul = 00C;  soh = 01C;  stx = 02C;  etx = 03C;
    eot = 04C;  enq = 05C;  ack = 06C;  bel = 07C;
    bs  = 10C;  ht  = 11C;  lf  = 12C;  vt  = 13C;
    ff  = 14C;  cr  = 15C;  so  = 16C;  si  = 17C;
    dle = 20C;  dc1 = 21C;  dc2 = 22C;  dc3 = 23C;
    dc4 = 24C;  nak = 25C;  syn = 26C;  etb = 27C;
    can = 30C;  em  = 31C;  sub = 32C;  esc = 33C;
    fs  = 34C;  gs  = 35C;  rs  = 36C;  us  = 37C;
    del = 177C;

    NUL = 00C;  SOH = 01C;  STX = 02C;  ETX = 03C;
    EOT = 04C;  ENQ = 05C;  ACK = 06C;  BEL = 07C;
    BS  = 10C;  HT  = 11C;  LF  = 12C;  VT  = 13C;
    FF  = 14C;  CR  = 15C;  SO  = 16C;  SI  = 17C;
    DLE = 20C;  DC1 = 21C;  DC2 = 22C;  DC3 = 23C;
    DC4 = 24C;  NAK = 25C;  SYN = 26C;  ETB = 27C;
    CAN = 30C;  EM  = 31C;  SUB = 32C;  ESC = 33C;
    FS  = 34C;  GS  = 35C;  RS  = 36C;  US  = 37C;
    DEL = 177C;

    (* what the control character combinations generate *)

       	    	  CtrlA = 01C;  CtrlB = 02C;  CtrlC = 03C;
    CtrlD = 04C;  CtrlE = 05C;  CtrlF = 06C;  CtrlG = 07C;
    CtrlH = 10C;  CtrlI = 11C;  CtrlJ = 12C;  CtrlK = 13C;
    CtrlL = 14C;  CtrlM = 15C;  CtrlN = 16C;  CtrlO = 17C;
    CtrlP = 20C;  CtrlQ = 21C;  CtrlR = 22C;  CtrlS = 23C;
    CtrlT = 24C;  CtrlU = 25C;  CtrlV = 26C;  CtrlW = 27C;
    CtrlX = 30C;  CtrlY = 31C;  CtrlZ = 32C;

    EOL = 36C;    	(* Modula-2 end-of-line character *)
    EOF = CtrlZ;	(* end-of-file character for text files *)

END ASCII.

The 'DEFINITION MODULE' is just about the only part of this library module. It lists the 'ASCII' constants both in upper- as in lowercase.
Take a look at the 'IMPLEMENTATION MODULE' which follows below...

IMPLEMENTATION MODULE ASCII;

(* (C) Copyright 1987,1988 Fitted Software Tools. All rights reserved. *)

END ASCII.

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