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48 lines
2.0 KiB
Plaintext
48 lines
2.0 KiB
Plaintext
Mini Mutation Engine v1.0 12-01-94 ArChung Lai, Chung-Li, Taiwan
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Super Mini Mutation Engine: [Total length 275 bytes]
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[Preface:]
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At the beginning of the year, classmate kk suddenly gave me a
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mutation engine to play with. I felt it was a good idea, but it's
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too fat. After I got my credit, still nobody has a smaller
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engine, so I wrote one of my own. Suddenly, I feel it is so
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tiny. Actually, I can make it smaller by about 100 bytes or so, I
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merely made it more fun...
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[parameter:]
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extrn mime:near, emime:near
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ES:0 => store decryption routine + encrypted stuff segment (from ES:0)
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DS:SI => point to stuff that u want encrypted (generally point to the
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beginning of the program)
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CX = the length of stuff that you want encrypted (to get total
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length via OFFSET EMIME )
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BX = offset of decrypt routine
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the length of the decryption routine made by this engine will be
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within 150 bytes, so you merely allocate the size of memory:
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the length of stuff that you want encrypted + the length of this
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engine + 150 bytes or so. (notice on TSR type)
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[return:]
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DS:DX => decryption stuff + encrypted stuff
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DS:DX points to decryption stuff + encrypted stuff after return,
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this is convenient for the Int 21h writing function.
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CX = the length of decryption stuff + encrypted stuff
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It's also convenient for the Int 21h writing function.
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Registers are preserved aside from the above registers and AX.
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[note:]
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You don't need to disassemble it with Sourcer, I will release
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the source code and append the associated development document for
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DIY. This is 'cause I have never released stuff that appended
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source code, it was modified and released once more by some
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kids, they even modified the version.
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reference: 8086/8088 Microprocsssor, architecture, programming and
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interface tech (Chapter 3)
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