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Forums > CSDb Discussions > Viewer for jj and gg files?
2020-09-26 01:31

Registered: Apr 2002
Posts: 240
Viewer for jj and gg files?

Does anyone remember what tool was used for viewing RLE-packed doodle and koala images on the 64?
2020-09-26 01:43
iAN CooG

Registered: May 2002
Posts: 2808
No idea but a tool for unpacking them should be easy enough to code, according to this doc
"Escape code is $FE and is followed by one byte indicating the value to repeat and another byte indicating how many repetitions of that byte are to be generated. That's the exact same stuff used for Doodle."
This tool is supposedly supporting both packed formats
Tom's Editor Desktop
edit: this one is native and should be the one you're searching for: Auto-Graph
I just added a d64 which includes the .doc as seq file
2020-09-26 04:26

Registered: Apr 2002
Posts: 240
You rule, iAN. Autograph is indeed the one I was looking for! Thank you!
I did find another as well, called "viewer" that seems to have come from Transactor, but it's much more primitive.
2020-09-26 20:16

Registered: Jan 2005
Posts: 580
How prevalent were these packed koala files? I personally never came across them in the 80's/90's. I only learned about them much later via GoDot docs, I think.

The fact they have an extension like with MS-DOS seems to indicate these were spawned by non-native tools?
2020-09-26 21:06
iAN CooG

Registered: May 2002
Posts: 2808
Probably just an USA thing, the tool was spread on Quantum-Link (which became America Online) and was probably a popular way of posting images on it by its users. The extensions were needed being a multiplatform "bbs".
2020-09-26 22:18

Registered: Apr 2002
Posts: 240
The most common way I've seen them is with gg or jj as the first two characters in the filename.
2020-09-26 23:15

Registered: Jan 2002
Posts: 2331
Yeah, pretty common on US boards and for the time a nice block savings for transfers.

AutoGraph is the defacto viewer for these files
2020-09-29 14:39

Registered: Jan 2005
Posts: 580
Sorry for the late reaction. But thanks for the info. I never went onto boards, so that could be why I never saw the RLE-encoded versions.
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