Re: Need infos

[Mike Pfaiffer <pfaiffer@mts.net>]

Pierre-e Gougelet wrote:
> 
> Hello,
> 
> >         I don't recognise most. The remainder look as though they are direct
> > copies of screen data. There are a few other formats you may want to
> > look at for example the GS filetypes $C0 and $C1. Then there are the
> > more interesting 3200 and GIF formats.
> >
> >         The DHR file type may simply be an uncompressed copy of both the AUX
> > and Main memory areas put end to end. It may also be the data could be
> > placed so alternate bytes would be moved to alternate data banks. My
> > preference would be to arrange it so loading the file would put the area
> > going into the Main memory bank would be loaded in the appropriate
> > position. Specifically if HGR1 were used then the main bank would be the
> > forst $2000 bytes and tha AUX would be stored in the second $2000. For
> > HGR2 the two would be reversed. The same would apply to a double low-res
> > file.
> 
> Do you have examples, specifications of these formats !
> 
> Regards. Pierre.

	Not immediately. I haven't worked with most for years. However I seem
to remember the FAQs having a brief description of the $C0 and $C1
types. As I said a lot of the others are simply copies of what is on the
screen. For example to save a copy of Hi-res screen one you would bsave
the range of memory from $2000 for a length of $2000 bytes into a file.
You can bload it into the same location to get the picture back later.
Names really don't matter unless you are using a program which expects a
specific name. I think some of the others may use some sort of encoding
or compression to reduce the space taken by the file. BTW, the Low-res
screen can work the same way except it is stored at $400 with a length
of $400.

				Later
				Mike




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