[Coco] Viewing GIF files on a Coco

[Roger Taylor]

Fred, as the others mentioned, GIF87a was the original format and most CoCo 
viewers support only that format.  However, unless you see animation or any 
other special effects, it's probably just a standard GIF but with the 
GIF89a header.  Most encoders just stick the GIF89a label at the beginning 
of the files even if the picture doesn't use any GIF89a features.  So... 
you can probably use a hex editor and change the 9 to a 7 and get those 
pictures to load using the older CoCo viewers.  Projector-3 doesn't have a 
problem with viewing GIF89a pics, and even supports some of the 89a 
features (to some degree, not ignoring them altogether).




At 04:51 PM 9/27/2004, you wrote:
>Hello everyone,
>
>I noticed on the RTSI site several OS-9 utilities that claim to enable a
>Coco to view GIF files. I downloaded and installed these utilities on my
>Coco's hard drive. I then chose a small GIF file, saved it to a 720k 3
>1/2" floppy disk, and then transferred the file successfully over to my
>Coco's hard drive using the utility Pcdos. I then tried one of the GIF
>viewing utilities, 'viewgif', to display the GIF file and it failed to
>display the picture. Instead it gave me an error message, saying 'unknown
>GIF version number'. I wasn't aware there was more than one version of
>the GIF file format. How do I save the pic in the correct version of GIF?
>
>Fred Provoncha
>
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Roger Taylor