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File cracking Apple Logo?



My first attempt at this ended in terminal failure.

My second attempt almost worked, but still doesn't run correctly.

Tracing the bootloader, I find that it loads some sort of RWTS (I recognized some of the code in a hex editor) and second stage loader at 3600-3FFF. (I can't imagine this is used past boot because of the importance of hi-res graphics!) My most recent attempt ran as 2 files and a bootstrap - the first file (similar to how Qix8 works) populated the RAM card, the second contained everything else.

Since CATALOG doesn't hit the 3600-3FFF area, it's not implausible there's a second RWTS somewhere, but I couldn't find it.

If this is true - I'd need to find out where the program storage is. Hopefully there is at least 4K of this - to hold a relocator, anything needed from $0000-$03FF, and anything needed from $9600-$BFFF. (With 4K plus the HGR screen, i.e., with 12K, that grants 512 bytes for the relocator. As the 7FD-7FF area is not used, a JMP there should be safe.)

-uso.