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Re: DOS 3.3, making sure I know what code areas aren't used



On Fri, 23 Dec 2005, Linards Ticmanis wrote:

Lyrical Nanoha wrote:
I'm thinking of hacking around with DOS 3.3, and I have a smart disassembler that produces code that I can easily get working with the assembler I use, can anyone tell me for sure what sections of code are data, code and unused?

Take a look at the "apple assembly line" articles. They contain a commented disassembly of most of the DOS 3.3 code.

http://bobsc5.home.comcast.net/aal/

I've consulted it.

I think it's a stock 3.3 I'm working with since I took DOS.SYSTEM from ExtraK and stripped off the header, then relocated it up.

Why not use a copy from an Apple-issued System Master disk? Then you'll know for sure it's genuine. I can mail you an image of the final release of DOS 3.3, straight from an original Apple disk.

Well...

1, I don't really want the later version because it just introduces more bugs at the cost of RAM space, there's not as much room to tweak. (That's why stuff like Pronto-DOS's patcher requires the 1980 version.)

2, the trick would be ripping a copy before it has a chance to JMP $9D84. :/ (I have some reasons for that.)

-uso.