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1988-09-25
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2KB
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36 lines
Manual for Arc ROM.
The ROM must be loaded into a sideways RAM bank. The Write Protect
of the bank must be OFF when using the ROM, because the ROM uses
the area of RAM after the code for a table. If the Write Protect
is off the ROM will work normally, but the produced arcfile will
contain nonsense when compression method 8 is used.
Start with :
*ARC
Firstly you will be asked for the name of the Arc file which must
be produced. Then the program will repeatedly ask for the name of
a file which you want to include in the arcfile. Then you will be
asked which "compression method" you want to use.
You can enter :
2 : Include the file without compressing.
8 : Dynamic Lempel-Zev compression. This method will
usually result in a considerable compression. There
are files, however, which will not be compressed and
even expand when this method is applied.
Together with each file in the arcfile, date and time will be
included. If Osword 14 is available, it will be used to get the
date and time, otherwise a fixed date and time are used
( September 25, 1988, 17:32 ).
When all files have been included in the arcfile, enter RETURN or
ESCAPE at the prompt for a file name. The arcfile will be closed
and the last active ROM will be started.
Note by Gerben Vos : ArcROM contains a bug, which causes some bytes
to be lost when compressing some large files using method 8. You
can check for this by decompressing the file. A workaround is to add
a number of extra bytes at the end (typically between 10 and 20).