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1994-08-03
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ARCHIVE Magazine Index Data for ARCSCAN III Filing System
=========================================================
[C] E.W.Ayers : Aug 1994 update to 03.08.94
ARCSCAN is a trademark of RISC Developments Ltd.
1. Organisation of ARCSCAN III
ARCSCAN III provides for two types of files:
Type 0 Magazine Files - With regular Volume and Issue numbers
Type 1 Others
The files are held within Directories, and a !Custom file tells ARCSCAN
what files to offer in its menu display, where to find them, and how to
display the information contained in them. To add new sets of data to
ARCSCAN, the appropriate directories must be created to contain the data,
and the !Custom file must be extended to specify them.
Once this has been done, files may be updated/extended, or further files
may be added to any existing DIRECTORIES. Provided they conform to the
format prescribed in the !Custom file, no further changes to the
latter will be needed.
2. Data on this Disc
The ARCHIVE data on this disc includes three sets of files:
ARCHIVE Magazine contents - Type 0
- Directory 'Archive'
- File ARvol07 (Vol7, 1-11)
ARCHIVE Monthly Discs - Type 0
- Directory 'ArDiscs'
- File Advol07 (Vol7, 1-11)
ARCHIVE Care/Shareware Discs - Type 1
- Directory 'ShareCare'
- Files Careware (Nos 1-21)
Shareware (Nos 0-51)
If you already have one or more of these directories, then the appropriate
files can be simply copied into them (any earlier version of the SAME file
will be overwritten, but files for earlier volumes will be unaffected).
If however a directory is not present you will have to extend the !Custom
file (see below) and create the required directory first.
3. The !Custom File
3.1 The Length parameter
The !Custom file provides for specifying the maximum length of each entry
in a file, and this is used to organise the 'paging' of the ARCSCAN
display. For the Type 0 files above, the length is set to 6, so that
several entries appear on each 'page' of the display. For the Type 1 file
above, the length is set to 25 (the maximum allowed), so that the display
shows one disc at a time. Setting this parameter wrongly, or exceeding the
specified length for an entry, may result in parts of a record scrolling
off the ARCSCAN display or being overwritten before they can be read.
3.2 Modifying the !Custom file
**** BACKUP your ARCSCAN Disc before proceeding! ****
To modify your !Custom file, get !Edit installed on the DeskTop Icon Bar.
Insert your ARCSCAN disc, and open a filer window. HOLDING DOWN SHIFT,
double-click on !ArcScan to open a sub-window, which should contain the
!Custom file. Drag this to !Edit. The latter should open a window
displaying the file contents. Click MEN (centre button) on this window,
and select Edit -> CR-LF, which should make the file readable.
Go to the foot of the list, using the scroll bars, and examine the last
block of entries - it will start with '#' plus a number. NOTE THIS NUMBER
- your entry will be the next number. At the end of the file you should
find '##'. Position the cursor (SELect on the mouse pointer) to the
immediate LEFT of this entry, and press RETURN. This should insert a blank
line before the '##' file terminator. Move the cursor up to the start of
it.
You now have to key in the entries for your new data. The formats are
shown below for each of the three data sets. You may choose to enter just
one, two or all three, but each entry must be matched by later creating
the appropriate directory, else ARCSCAN is liable to have a nervous
breakdown!
3.3 New Entries in !Custom file
The tables below show the entries for each of the three data sets. The
parameter shown as <n> is to be replaced by the next entry number (without
the '< >' ). The tabulated entries should be inserted between the last
existing entry and the end-of-file marker '##', with no blank lines,
extra spaces or other characters. NB no RETURN after the last item in the
list!
ARCHIVE Magazine Monthly Discs Share/Careware Discs
---------------- ------------- --------------------
#<n> #<n> #<n>
Archive ArDiscs ShareCare
Archive ArDiscs ShareCare
Archive ArDiscs Sharecare
ARvol Advol *
0 0 1
6 6 25
3.4 Saving the Amended !Custom File
Now again select Edit -> CR-LF by the MEN button, to compact the data.
Click MEN on your !ArcScan sub-window, select 'File !Custom -> ' and then
the delete option to remove the old file. Click MEN on the !Edit window
and select SAVE which will open a save box and an Icon. Check that the box
still shows the filename as ....!Custom, and drag the Icon to your
!ArcScan sub-window. Create new directories with the names you have
specified and copy the data files into them as indicated in para. 2 above.
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