44 lines
2.5 KiB
Plaintext
44 lines
2.5 KiB
Plaintext
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MLINK206.UNP
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The following is a method to unprotect MultiLink Ver 2.06 to allow
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booting directly from hard disk without the need to insert the
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MultiLink distribution disk.
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ENTER COMMENTS
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------------------------- ---------------------------------------
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C>copy mlink.com mlink.bak Make a backup first!
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C>debug mlink.com Start debug session.
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-u 2dfa Unassemble from address 2DFA.
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You should see:
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xxxx:2DFA CALL 2F01
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xxxx:2DFD JNB 2E10
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xxxx:2DFF MOV CX,2908
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xxxx:2E02 CALL 2F01
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xxxx:2E05 JNB 2E10
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xxxx:2E07 DEC BYTE PTR [2E0F]
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xxxx:2E0B JG 2DF2
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xxxx:2E0D JMP 07C4
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xxxx:2E10 XOR BYTE PTR [2E0D],32
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xxxx:2E15 MOV AX,[23C4]
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xxxx:2E18 CMP [2705],AX
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If you don't see this, you have another
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version. If so, enter 'q' to quit the
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debug session. Otherwise, continue.
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The instructions at
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xxxx:2dfa, xxxx:2e02, and xxxx:2e1c
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need to be replaced.
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-e 2dfa f8 90 90 CALL 2F01 is replaced by CLC, NOP, NOP
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-e 2e02 f8 90 90 CALL 2F01 is replaced by CLC, NOP, NOP
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-e 2e1c 90 90 JNZ 2E0D is replaced by NOP, NOP
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-w Save the changes to disk
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-q End the debug session.
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*End of MLINK206.UNP*
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6.UNP*
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