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- ;;07-18-85
- BBACK.DOC v.6.22
- 11/09/85
- Eric Gans
- French Dep't UCLA
- Los Angeles, CA 90024
-
- Version 6.22
- Versions 6.21 and 6.22 correct bugs in the catalog rewriting rou-
- tine in v6.2. No other bugs have been found recently...
-
- Version 6.2
- Allows option of creating/using catalog; changed syntax to use
- switches. Fixed a couple of (smaller!) bugs in date, error,
- number-reading routines.
-
- Version 6.1
- Fixed a number of serious bugs in v6.0 in reading the date,
- rewriting the catalog file to disk, checking for duplicate
- backups, etc. Added output of the catalog file-name & changed
- a few messages. BBACK, like BBCAT, now makes a BAK file if the
- catalog is changed. CAL v1.4 no longer includes specific Kaypro-
- 10 graphics commands. Also updated BBDEF (v1.2).
-
- Version 6.0
- Enters backups/dates in catalog. Eliminated LBR dating option
- because of CRC library directory errors.
-
- [previous version information has been eliminated for greater
- readability]
-
- <<< NB >>> The COM files in this library are named with version
- numbers to avoid confusion with other versions. These numbers
- should be removed from the names before use; BBDEF will work only
- with files named BBACK and BBCAT (not BBACK62 etc.), and CAL
- rewrites itself to disk as CAL.COM and will not work as
- CAL14.COM.
- ***
-
- The backup program BBACK.COM was inspired by an inaccuracy
- in Johnson-Laird's "Programmer's CP/M Handbook," p. 26: "the File
- Changed bit (bit 7 of byte 11) is always set to 0 when you close
- a file to which you have been writing." Unfortunately, in CP/M
- 2.2 it isn't.
-
- Thus to use BBACK correctly, you must first modify your BDOS
- to reset this bit whenever a file is closed. Check the addresses
- in the included patch ARCH.AZM, assemble it with a Z80 assembler,
- and load the HEX file with SID, DDT, MLOAD etc. along with the
- file (most often called SYSGEN) that contains a memory image of
- the BDOS. (On the Kaypro-10 this file is called PUTSYS.COM.)
- After patching, execute the file and its contents will be written
- to the system tracks of your disk. If you have CP/M v.3, you
- can skip this procedure.
-
- Commands
-
- Format 1: bback [d1:]fn.ft [>d2] [/nu] (*? ok in fn.ft)
-
- d1 is the drive to back up (default: current drive)
-
- d2 is the drive on which the backup will be made. The default is
- set to C: (floppy drive on the Kaypro-10); it can be reset with
- BBDEF.
-
- fn.ft can (and usually does) contain wildcards
-
- Switches:
-
- N = Don't catalog backups (for users who want to use BBACK
- without its cataloguing feature, or for files you don't want
- included in your catalog).
-
- U (formerly "#") = Search all user areas. If this option is
- used, the files will be copied to their repsective user areas
- on the backup disk; thus if you have two copies of the same file
- in different user areas they will remain separate.
-
-
- Examples: bback c:*.zap >d /n | bback urk.* | bback a:*.* >c
- bback z*.* /u
-
-
- Format 2: bback [d1][>][d2] [/nu] (the '>' is needed if EITHER
- d1 or d2 is present.)
-
- You will be prompted for filetypes to be backed up. The format
- for this entry is: >>ft1;ft2;ft3... (max 127 chars)
-
- Wildcards are permitted; enter a space for blank filetype.
-
- Example: >>zap; ;s*;??z will back up files: *.zap | *. (blank
- file-type) | *.s?? | *.??z If you used the /u switch in the
- command line, they will be searched for in all user areas of the
- selected drive.
-
- After copying the file, BBACK will set the archive bit of
- the original (not the backup) file. The next time BBACK is run,
- it will not copy the file if the archive bit is set. If you patch
- your BDOS with ARCH.AZM, CP/M will reset the archive bit whenever
- the file is closed (which presumes it has been written to). Thus
- BBACK permits you to back up sets of files without having to
- recall which ones have been written to since the last backup. In
- conjunction with BBCAT, it provides an automatic file-dating and
- cataloguing system that requires you only to keep the current
- date in CAL.COM.
-
- Catalog entry
-
- This feature requires no extra input from the user.
- Unless you use the "N" switch, BBACK will look for a catalog
- file of form BB*.CAT on the user area from which it is called,
- and will prompt you to create BB0.CAT if it fails to find one.
- (This file can be renamed as you please within the BB*.CAT
- filespec.) The catalog requires disks to contain the
- traditional -*.nnn (0 < nnn < 256) number file, but if you
- haven't numbered your backup disk BBACK will number it 255 (if
- you use two disks, the second will be numbered 254, etc.). The
- format of the number file is -+RENUM+.nnn; the point of the name
- is to remind you to renumber the disk. BBCAT can do this and will
- also renumber all affected catalog entries. Catalog entries
- include the date and the disk number; if you back up a file on
- the same disk the catalog entry will be updated (not duplicated).
- When BBACK copies a file it outputs a list of previous backups; a
- backup on the same disk is indicated by "=". Since BBACK only
- eliminates old backups by overwriting, you should keep your
- catalog current by not backing up the same file in different user
- areas of a diskette. I suggest you create separate catalogs for
- groups of files you back up on different sets of floppies.
-
- Automatic cataloguing makes it much easier to keep track of your
- backups and to eliminate duplicates. Aside from the dating
- feature, BBCAT allows greater user control over file entry
- (including renumbering of disks and selective entry/deletion of
- files) than other catalog programs. Please see BBCAT.DOC for
- further details.
-
- Dating feature
-
- BBACK expects to find CAL.COM in user area A0, and copies
- the date (presumably current) stored in that file. In order to
- date your files (both the original and the backup copy), two
- formats are used:
-
- - For MBasic files (including ASCII .BAS files) the first line
- must begin: 0 REM xxxxxxxx
- I usually put: 0 REM xxxxxxxx <-- last modified
- The date will be entered in the place of the 8 x's.
-
- - For text files, the first two bytes of the file must be ;; or
-
- WordStar/NewWord and will not show up in printouts or line
- counts. You must put a hard <cr> after the date.) The date will
- occupy the next eight bytes. (See this file itself for an
- example.) You should enter eight spaces after the ;; or .. (the
- easiest thing is to enter: ;;xxxxxxxx<cr>); otherwise the date
- will replace whatever is in the eight bytes following the ;;. If
- CAL.COM is not present, BBACK will enter the date 01-01-80.
-
- LBR file dating has been eliminated, since NULU and other library
- utilities interpret changes in the directory as CRC errors. You
- should still include a date file in all libraries. CAL.COM makes
- a daily -mm-dd-y.y## file for this purpose.
-
- Customizing Default Settings
- BBDEF.COM v1.2
-
- The original default settings are found in the first sector of
- BBACK and BBCAT. You can use BBDEF to change them; you will be
- prompted for entries. (Warning: DO NOT use BBDEF 1.0 with BBACK
- 5.1+; BBDEF 1.1 will work with BBACK 6.2, but will not modify
- BBCAT.) BBCAT and BBACK must be renamed as such (not BBCAT12 etc)
- for BBDEF to work.
-
- ADDR Decription Setting
-
- 102H = Highest drive (a=1) 3 (=C:)
- 103H = Default backup drive 3 (=C:)
- [104H = MAXFL 16 (for a 60K system)]
-
- 102H in BBCAT = Def back dr 3 (C:)
-
- MAXFL is no longer used in v6.1+, as the catalog must be written
- into memory as well. Figuring 1000 files in the catalog (=16 K),
- plus 8.5 K for BBACK + the operating system, you will have room
- for about 1300 new files in a typical 60 K system (12 bytes per
- file for BBACK's file table, plus 16 more for the new catalog
- entry). To be on the safe side, BBACK now gives you an error
- message if you enter more than 1024 files at one time: not a very
- severe constraint!
-
- Notes
-
- - BBACK uses the entire free memory area as its file buffer. The
- catalog file is written into memory above the file buffer;
- catalog entries take 16 bytes per file. Even if you have 2000
- entries in your catalog, there is still room for something like
- 800 new entries on 60 K systems.
-
- - The filetype buffer is 127 bytes long (30+ filetypes).
-
- - To abort the program while copying, type any key. It will
- terminate when the current file has been backed up.
-
- - If the backup diskette (or its directory) is full, BBACK will
- prompt you to insert another diskette to continue its operation.
-
- - The DMA is kept at 80h. This means a lot of disk activity if
- you use BBACK to copy files from one side of a hard disk to the
- other; but that's not the normal way to make backup files, is it?
-
- RDATE.COM v1.1
-
- This program reads the date from files backed up with BBACK.
-
- Format: rdate [d:]fn.ft Wildcards are accepted. If rdate [d:] is
- entered alone, all files except COM files are included. The file
- table holds a maximum of 69 files (one screen full in 3 columns).
- This utility allows you to examine the dates of your files
- without having to access them individually. Although BBACK v6.0+
- no longer enters the date in LBR files, RDATE will still read the
- date from datefiles that use CAL format (-mm-dd-y.y##).
-
- CAL.COM v1.4
-
- This little calendar program is self-explanatory. You enter
- "N(ext)" once a day to keep the date current, "C" to change the
- date to something other than the next day, and "S" if the date is
- unchanged. If you change the date, CAL will create a zero-length
- file -mm-dd-y.y## (and erase any previous such file) for the
- purpose of dating libraries, etc. For use with BBACK, CAL must
- be kept in A0. The current version of CAL will work for the 20th
- century only; an update will be issued in 1999 (if I live that
- long). The Kaypro-10 graphics included in previous versions have
- been removed from v1.4 out of sympathy for non-Kaypro users.