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-
-
- Date: 930626
-
- File: Help with .ARC
-
-
- How To Use ARC
- --------------
-
- ARC is a handy utility which makes our file transfers much easier and in many
- cases completely foolproof. The utility itself is powerful, and you will want
- to read the complete documentation file for more information, this small
- tutorial is aimed at just how to use the ARC file extractions and creations
- with ARC. There are BASIC programming utilities, printing and viewing
- facilities, DOS wedge commands, and even an editor inside the many facets of
- ARC itself.
-
- Please remember that this Commodore ARC method is not compatible with the MSDOS
- ARC version nor the CP/M ARK version.
-
- For file transfers, ARC does two very important things. It COMPRESSES the
- data, allowing for a 10-50% or more reduction in the size of the material you
- download. It also combines several necessary files into one easy to manage PRG
- file. Many programs have one or more machine language overlays, a
- documentation file, the main file itself, and might have even more extra files
- to go with it. In the past, people had to make sure they uploaded every single
- necessary file individually, taking care to preserve data if there was a binary
- SEQ file. Then we had to make sure that we downloaded every single file
- necessary to run the program successfully. ARC makes all the worries about
- that go away. When something has been ARC'd, there is no worry about looking
- for additional files or worrying about what filetype to download something as,
- or even worrying about XMODEM padding! No padding problems!
-
- The first step in downloading any of the programs in the Software Library which
- have a .ARC at the end of their names is to download the current version of
- ARC. You only download the ARC program one time. Place it on a utility disk,
- you can use the same program over and over for every ARC'd file you download,
- or each ARC'd file you wish to create for uploading.
-
-
- While you are sitting there downloading, download one of the programs which
- requires ARC to dissolve it. Remember, they will have a .ARC in the name of
- the file in the Software Library. This is your key to knowing that ARC will be
- required.
-
- When you download the file, remember to name it with a .ARC on your disk, too.
- <Don't use shifted letters, type the filename normally, just be sure to leave
- enough room to use a period and 'arc'.
-
- There are some ARC files which dissolve automatically, and do not require the
- ARC program. These are called Self Dissolving ARCs, and are all marked .SDA or
- .SFX in the Software Library. These you just load into memory and RUN. The
- proper file<s> will be written to your disk for you. About the only thing you
- should worry about in an SDA/SFX file is to watch for duplicate filenames. I
- always name my .SDA/.SFX file with a period and 'SDA' (or .SFX) at the end of
- it, knowing that no other file in the set would be named that. Make it a good
- practice to dissolve .SDA and .SFX files to a freshly formatted disk.
-
-
- OK, I just Downloaded the ARC Program file...
-
- After you have logged off, strip ALL XMODEM padding from the ARC program with
- one of the padding stripping utilities as described in the Survival Kit about
- XMODEM PADDING. ARC'd files themselves are not susceptible to XMODEM padding
- because the data is preserved inside the file itself, complete with checksums
- and byte counts. It is just the ARC PROGRAM which you download for the first
- time which must be stripped of every single padding character. Even a single
- extra CONTROL Z at the end of the program could mess it up. Follow
- instructions and precautions for stripping XMODEM padding as usual. Step by
- step XMODEM PADDING information is item 4 on the Survival Kit menu.
-
- ARC does not work with fastloading cartridges and programs. Disable them
- before trying to use the program.
-
- Now, load ARC and run it. It will display the version number, the copyright
- notice by the author, Chris Smeets and turn your screen black. Then you will
- see the regular READY prompt with a flashing cursor underneath it. That means
- everything is OK!
-
- ARC does not use fancy title screens or menus. It was written as a TOOL or
- UTILITY, and works like a WEDGE. What it does is add new commands to your
- BASIC! You just type in direct mode what you want ARC to do. This is why the
- complete set of instructions documentation file is so important.
-
- After you RUN ARC, you are ready to dissolve that program you downloaded! Place
- the disk with it in drive 8. If you have a second drive, place your
- destination disk in that one.
-
- Now, lets check the directory on drive 8 to make sure that the file is there
- and is named properly. <<I called mine GAME.ARC>>
-
- The command to view the directory is: DIR
-
- Just type in 'dir' in direct mode:
-
- dir
-
- After you press return, the directory contents will be displayed on drive 8.
-
- Make sure that GAME.ARC has a period and the letters 'arc' as the last
- characters in the filename. If not, rename the file!
-
- First, lets learn how to extract the ARC'd file to just one drive. Its called
- UnARCing or DeARCING or Extracting or Dissolving.
-
- To Dissolve a Downloaded File:
- ----------------------------- On 1 drive system, type at the ready prompt,
-
- ARC/X A:GAME
- ! !!!!! !
- ^ ------- --> the ARC command, remember its a new BASIC command.
- ^------ --> No space at all, ARC is always followed by a slash.
- ^----- --> The ARC option you want to use, X means eXtract, or
- dissolve-sometimes called unARCing or deARCing.
- ^---- --> ALWAYS a space after the command and before the filename<s>
- ^--- --> Denotes drive A, which is drive 8, for the Arcfilename, GAME
- ^-- --> A colon always separates the drive notation from the filename.
- ^ --> The ARC file name itself on your disk. You do not have to
- type in the .ARC, tho.
-
- On a 2 drive system, place the source file in drive 8, destination disk in
- drive 9, enter:
-
- C: (changes default to drive 9)
- ARC/X A:GAME C:
-
- Adding the C: to the end tells ARC that you want the output on the C: drive,
- which is drive 9. As ARC extracts the file, the original program and any
- accompanying files will be written to drive 9 this way. See Chris Smeets'
- excellent instruction file for more information about drive assignments and
- directing your output.
-
- After you press RETURN, the files will be written to your disk. Make sure that
- you have enough room on the disk for the new files! I find it best to allow
- the size of the GAME.ARC plus about 50% more to guess at the number of free
- blocks I should have. TEXT files and some Graphics files are about the only
- things which might be larger than that 50%.
-
-
- ARC RECAP/Reference:
- -------------------
-
- 1. Load the latest version of ARC. (Currently 2.30, File # 2586)
- 2. RUN it.
- 3. Check to see if the file to be dissolved on your disk has a '.arc'
- at the end of end of the filename.
- Our Example will use GAME.ARC
- 4. Consult the complete instructions in files 3362 or 2423.
-
- To Extract a Downloaded File: (or UnARC):
- -----------------------------
- On 1 drive system, type at the ready prompt,
-
- ARC/X A:GAME
-
- On a 2 drive system, place the source file in drive 8, destination disk in
- drive 9, enter:
-
- C: (changes default to drive 9)
- ARC/X A:GAME C:
-
-
- Disk Commands within ARC:
- ------------------------
-
- DIR - gives you a directory listing of the default directory.
- > - to send any disk command, ala Wedges.
- MOVE - Moves File between drives.
- MOVE A:FROMHERE C:TOHERE
- the above moves file from drive 8 to 9
-
- Creating an .ARC file to upload:
- -------------------------------
-
- ARC/C A:ARCNAME C:FILE1 PATTERN* FILE2 DD*
-
- You can specify EXACT filenames or use pattern matching to catch all files on
- the disk with the characters DD, for instance.
-
- Add to an existing ARCfile with:
-
- ARC/A A:ARCNAME C:NEWFILENAME
-
- Listing an .ARC file contents:
- -----------------------------
-
- ARC/L A:GAME
-
- This command will let you see exactly which files, their original sizes and how
- much compression ARC used on them, with exact filenames and filetypes so that
- you can make sure an ARC worked right or to check for duplicate filenames
- before eXtracting the ARC'd file.
-
-
-
- Thats it in a nutshell. The process is actually much simpler than I have
- made it sound, so don't be intimidated by it.
-
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