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- LU.PAS MS-DOS VERSION 1.21 January 12, 1985
-
-
- NAME
-
- lu - create and maintain a Novosielski library file.
-
- SYNOPSIS
-
- lu - all prompts for data are done by the program
-
- DESCRIPTION
-
- Library Utility (Pascal) is a program to allow combining
- multilple files into one larger file.
-
- Version 1.21 replaces all prior versions of Pascal coding.
- The major revisions are:
- revamping of the screen handling to use the graphics
- characters in the character set.
-
- making the modifications to the library more interactive
- through the use of automatically updated directorys
- on screen at all times, filesize and entry usage...
-
- The use of a simple window scheme to keep prompts from
- overwriting any of the screen display.
-
- the addition of a status line/function key setup to
- allow use of the function keys to control LU.PAS
-
- Version 1.21 does NOT include the following LU86 4.0
- revisions:
-
- The addition of CRC calculation and checking to improve
- reliability,
-
- The addition of member time and date stamping,
-
- Support for exact file lengths of library members.
-
- Wildcards may MOT be used.
-
- Error reporting and recovery have also been improved.
-
-
- Prior versions of 16-bit LU and LU86 would re-use
- deleted directory entries when performing an add/update
- operation. LU.PAS 1.21 will not reuse deleted directory
- entries [Note 1] and requires reorganization to reclaim
- deleted directory entries. This was done to provide
- an indication of unused space in the lbr file.
- *
- [Note 1]
- Except that in the case where an added file has
- the same name.typ as a DELETED entry, the DELETED
- entry is intentionally invalidated by LU.PAS to
- prevent an inadvertent unerasure and duplication of
- that entry name.),
-
-
-
- -1-
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- LU86.EXE MS-DOS VERSION 4.0 September 2, 1984
-
-
- LIBRARY FORMAT
-
- The entire library file and each of its members are concep-
- tually organized into "sectors", each sector being 128 bytes
- long. (From CP/M, where LU originated). Each sector of the
- file belongs to at most one library member. Each member
- comprises a whole number of sectors. The last sector of a
- member may, however, be logically declared as a "Short
- Sector". Although it physically contains 128 bytes, a Short
- Sector contains one or more "pad" bytes at the end for the
- purpose of maintaining the structure of the library file as
- a whole. A member may have as few as 0 sectors.
-
- Members may be referred to by a name of up to 8 characters,
- and an extension of up to 3 characters. The naming rules
- are identical to those for the naming of CP/M-80 disk files.
- Members must be uniquely named; any given combination of
- name and extension may identify at most one member.
-
- The start and end points of each member are defined by the
- pointers in a "directory entry" for the member. There are
- no embedded start or end marks separating the members. All
- sectors between the start and end sectors of a member belong
- to that member. The members need not appear in the library
- in the same order that their directory entries appear in the
- directory.
-
- The directory information in an LU style library is con-
- tained in the same file as the data files, or members. The
- amount of space to be allocated to the directory must be
- specified by the user when a new library is created, but can
- be changed when the file is reorganized. The size of each
- LU directory entry is 32 bytes, which means each four direc-
- tory entries take up one 128-byte 'sector' of the library
- file. The LU directory uses one entry for control informa-
- tion itself, so the number of directory 'sectors' needed
- for a library of m members is (m + 1) / 4, rounded up to the
- next whole number.
-
- The user need not be concerned with this discussion, as
- directory size is calculated by the program. All directory
- sizes are input and output in terms of entries, each entry
- being a potential member file. The program adjusts directory
- size to an integral number of sectors.
-
- MISFEATURES (BUGS)
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- -2-
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- LU86.EXE MS-DOS VERSION 4.0 September 2, 1984
-
-
- ACKNOWLEDGEMENTS
-
- Gary Novosielski designed the LU format and wrote the first
- programs supporting 'LBR' files. He has continued to main-
- tain and improve the LU format by distributing a file of the
- offical LU format definition. The current version of this
- definition is contained in LUDEF5.DOC. Interested users are
- directed to that file for more complete information on the
- LU format.
-
- Large portions of this document are excerpts from the CP/M
- file LU300.DOC, which documents the operation of the CP/M
- version of LU (an implemenation much superior to LU86, by
- the way). Any particulary lucid and useful sections of this
- document probably originated with Gary Novosielski. The
- Turgid Obfuscation is probably mine.
-
- This program had its genesis in the UNIX progam LAR.C. LAR
- was rendered into C that mortal compilers could understand
- by Tom Jennings who renamed the source to LU.C. I used LU
- as a base and have renamed the effort to LU86.
-
- LU86, ver 4.0 is a 'C' program, and is compiled with version
- 2.10B of the Computer Innovations C86 MS-Dos compiler.
-
- LU.PAS was written by Steven ????, and heavily modified
- by John Plocher.
-
- This doccumant was unselfishly pilfered and palagerized from
- the doccumentation for LU86 4.0 by the following person:
-
- Paul J. Homchick
- Chimitt Gilman Homchick, Inc.
- One Radnor Station, Suite 300
- Radnor, PA 19087
-
- LU.PAS is written to compile with Borlands Turbo Pascal,
- and run on a Victor 9000. It will run on an IBM PC with
- these changes -
- the window handling routines make 2 assumptions:
-
- 1 : the text screen being used is located at $F000:0000
- and is 2048 words (16bit) large, and
- (the IBM PC is at E000:0000 or $E800:0000)
- 2 : The terminal driver recognizes the VT 52+ screen
- control codes to move & save cursor...
- These are NOT the same as ANSI (IBM PC) codes!
-
- In addition, there is a chance that the character graphics
- used here will not be the same as those on the Victor.
-
-
- The changes/additions to this program and this doccument
- were done by:
-
- John Plocher
- 17403 McIntyre
- Detroit, MI
- 48219
- (313) 535-7858
-