16 February 2006, 20:43 | #1 |
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New Tutorial: T2Demo WHDLoad
Hi all,
My tutorial of T2: The Arcade Game (coverdisk demo) is available in the zone and also on my website at www.reversers.net (under amiga->tutorials) Feedback, corrections, etc... appreciated -C6 |
17 February 2006, 01:52 | #2 |
Going nowhere
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I liked the tutorial, easy to read and well explained.
1). Could have gone into more detail as to how you know how to convert the sector values given by the game to be converted into something WHDLoad understands, otherwise you run the risk of people not understanding how you got to get WHDLoad to correctly the data correctly. 2). Is it enough to simply look for that one MOVEM.L header for the RNC loader? By giving people other clues such as looking for code containing $55555555 (in ascii as 'UUUU') or $dff07e, $dff020, $dff024, you give people a little more understanding as to how to find a loader. Remember not all loaders are RNC, but by giving a little more information you help others to find other loaders in other games. After all, a tutorial is a step toward doing another game All in all though, a good tutorial that wasn't too 'techy' in its writing and was written so most people with even a basic grasp on coding could achieve. Perhaps commenting the slave code more would help others to understand. |
17 February 2006, 22:11 | #3 |
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Nice tutorial Crackersixx. Had a good read.
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03 March 2006, 07:46 | #4 |
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Links where to find/buy tools needed would be helpfull in tutorial. Took me couple hours just to find couple of tools.
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03 March 2006, 21:21 | #5 |
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tell me what you are missing..
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04 March 2006, 01:48 | #6 |
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Thanks for the feedback guys. I'll be updating the tut with further info from galahad about how the disk layout translates to whdload (which I intended to include in the first place)
I may also host the needed tools on my site as well and just make mention of that in the tutorial. |
04 March 2006, 10:44 | #7 |
2 contact me: email only!
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You should also add the code I sent you about detecting the quitkey while you're at it!
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06 March 2006, 16:43 | #8 | |
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Quote:
Can you put in the zone all of it? |
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06 March 2006, 21:27 | #9 |
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Codetapper: I still havent gotten the quitkey functionality to work... Maybe I am hooking a bad location, i dunno, but when i press a key with a breakpoint at my location, the BP does break in.
I've just gotten a new HD for my 1200 and I am installing os3.9 so I have to wait a few more days until I can get back to trying to figure out the rest of the issues on this slave. |
09 March 2006, 23:04 | #10 |
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some comments
there is a macro in ReSource which called 'Disassemble BOOT sector', it directly reads the 2 sectors from disk in df0: and disassembles. requires that a physical disk is present but would save some steps in the beginning of your example. in the whdload slave structure you use: Code:
dc.l $80000 ;ws_BaseMemSize ... _expmem dc.l $80000 ;ws_ExpMem Code:
_MemPatch move.l #$80000,d0 rts Code:
_MemPatch move.l (_expmem,pc),d0 rts or is maybe the expmem anyway not used within this game? it should be noted, that for sequences like: Code:
lea $70000,a0 ;Rob Northen Patch move.w #$4ef9,(a0)+ pea _RobNorthenLoader(pc) move.l (sp)+,(a0)+ Code:
patch $70000,_RobNorthenLoader ;Rob Northen Patch and new whdload versions provide the feature of patch list (resload_Patch) which will make this even more compact but really nice to see such tutorials hope to see more new slaves soon... |
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