[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
File cracking Apple Logo?
- Subject: File cracking Apple Logo?
- From: Steve Nickolas <usotsuki@buric.co>
- Date: Thu, 15 Nov 2012 22:21:29 -0500
- Bytes: 2169
- Cancel-lock: sha1:ADhKoD2rgDne6hvI5okvb7/Bka8=
- Injection-info: mx04.eternal-september.org; posting-host="b1331f5cb4326106a7720f5a86b16b36"; logging-data="15791"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+vJFVhnbeMHIBbm2xCXgjI1LBYlPP95xU="
- Newsgroups: comp.sys.apple2
- Organization: A noiseless patient Spider
- User-agent: Alpine 2.02 (DEB 1266 2009-07-14)
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.