SYDMELEX - Source code & documentation, HP-71 LEX files from Sydney & Melbourne
LEX files : KEYCHRLX, FLTYPELX, FILELEX, MSGLEX, MCOPYLEX, MAKFILEX, NRLX71,
            DATELX71, CRPTLX71, BUFSTO10, MISCLEX1, TFLAGS, HORNER
Documentation & source code : SYDMELEX. Some of the documentation & source code
found in SYDMELEX is apparently duplicated elsewhere on SWAP07. However, some
source code is found ONLY in SYDMELEX.
Description: The subject Language EXtension files add many new features to HP71
BASIC :
-- KEYCHRLX provides enhanced control for keyboard inputs. Improved KEYWAIT$.
   Allows controlled multi-keycode response of 1 to 15 key counts. G. Fraser.
-- FLTYPELX : Enhances DATACOMM ROM keyword FTYPE$ to allow for mass storage or
  other device specifiers. Determines file type. Graham Fraser.
-- FILELEX : Enhances JPCLEX keyword FILE? to implement the Invalid Filespec 
   and Device Not Found errors. G.B. Fraser.
-- MSGLEX : Modified version of HP's MSG$, returns error if arg.>255255. G.F.
-- MCOPYLEX : Copies blocks of information from one mass storage device to
  another. Uses all available memory as a buffer. No error checking, could use
  any source or destination device type-- could use external keyboard as source
   By Nigel Davies.
-- MAKFILES : Creates HP-71 file from hex code. See file MAKEFILE for how-to.
   By Ian Harvey.
-- NRLX71 : Provides functions for rounding numbers up, down or near. I. Harvey
-- DATELX71 : Has keywords for manipulating date information numerically. I.H.
-- CPRTLX71 : Displays copyright message. Zaps CHARSET buffer. Ian Harvey.
-- BUFSTO10 : provides 10 buffers in which you can store strings containing 
  information. This info can of course be recalled. It is protected from
  DESTROY ALL. Various applications. Jack Elhay.
-- MISCLEX71 : This file provides keywords that give greater control over the
  EOL string. You can now set the three character string, and then specify how
  many characters are actually used (0, 2 or 3). Default is CR LF LF, which
  gives a convenient toggle between single and double spacing of lines. Nice.
  Also provides a function to convert numbers into integer strings, & a keyword
  to determine the DIMensions of numerical & string arrays & matrices. J.Elhay.
-- TFLAGS : a flag toggling routine. Easier to use. Jack Elhay.
-- HORNER : provides a keyword that makes evaluating polynomials (up to degree
  13) very easy. Much better than writing an equivalent BASIC routine! J.Elhay
NOTE: These files have been submittes to JPC for inclusion in JPCLEX.

MAKEFILE : A program that creates HP-71 files from HEX listings.