******************************* MultiLink version 2.07 ************* MLINK207.UNP The following is a method to unprotect MultiLink Ver 2.07 to allow booting directly from another disk without the need to insert the MultiLink distribution disk. ENTER COMMENTS ------------------------- --------------------------------------- C>copy mlink.com mlink.bak Make a backup first! C>debug mlink.com Start debug session. -u 33EC Unassemble from address 33EC. You should see: xxxx:33EC CALL 34DF xxxx:33EF JNB 340D xxxx:33F1 MOV CX,2908 xxxx:33F4 CALL 34DF xxxx:33F7 JNB 340D xxxx:33F9 DEC BYTE PTR [2544] xxxx:33FD JG 33E9 xxxx:33FF INC BYTE PTR [2543] xxxx:3403 CMP BYTE PTR [2543],01 xxxx:3408 JBE 33E9 xxxx:340A JMP 07C4 If you don't see this, you have another version. If so, enter 'q' to quit the debug session. Otherwise, continue. The instructions at xxxx:33EC, xxxx:33F4, and xxxx:3414 xxxx:34B8, xxxx:34BC, and xxxx34BE xxxx:34C0, xxxx:34C1 need to be replaced. -e 33EC F8 90 90 -e 33F4 F8 90 90 -e 3414 90 90 -e 34B8 90 90 90 90 -e 34BC 90 90 -e 34BE 90 90 -e 34CO 90 -e 34C1 90 90 -w Save the changes to disk -q End the debug session. *End of MLINK207.UNP* *********************** MultiLink versions 2.08, 2.08c, 3.00c ********* FOR THE USERS THAT HAVE 'MULTILINK' VER. 2.08 and 2.08c and 3.00c ---------------------------------------------------------------------------- THIS IS DATED OCT 18, 1984 AND SUPERSEDES ALL UNDATED VERSIONS OR DATED VERSIONS PRIOR TO THIS DATE FROM : THE A.S.P ; (Against Software Protection) ORIGINALLY SUBMITTED TO ASA FULTON'S BBS (SHINING SUN - 305-273-0020) AND TO LEE NELSON'S BBS (PC-FORUM - 404-761-3635) PLEASE NOTE THAT THESE UNPROTECT PROCEDURES INVOLVE FROM 4 HOURS TO ___________________________________________________________________ 40 OR MORE HOURS ( 6+ HOURS FOR 'MULTILINK') OF SINGLE STEPPING THRU CODE AND FIGURING OUT THE INTENT OF THE ORIGINAL CODE.. SO I WOULD APPRECIATE IT WHEN U PASS THIS ON TO OTHER BOARDS YOU DO NOT ALTER THIS OR TRY TO TAKE CREDIT FOR MY LOST SLEEP.... THE A.S.P... (J.P. TO HIS FRIENDS) IF YOU HAVE A HARD DISK OR WANT TO CREATE A BACKUP COPY THAT IS NOT TIED INTO THE 'MULTILINK' DISKETTE...IN CASE YOUR ONLY COPY GOES BAD .. THIS PATCH WILL REMOVE THE COPY PROTECTION COMPLETELY.... AS ALWAYS THIS IS FOR YOUR PERSONAL PEACE OF MIND ONLY IT IS NOT MEANT TO BYPASS ANY COPYRIGHTS..YOU ARE BY LAW BOUND BY YOUR PURCHASE LICENSE AGREEMENT. IF YOU HAVE A HARD DISK AND WANT TO PUT THE PROGRAM ON SUCH WHY SHOULD YOU BE TIED TO A FLOPPY. YOU HAD TO GIVE UP A LOT OF 'BIG MACS' TO GET YOUR HARD DISK. 1). FORMAT 1 SYSTEM DISK UNDER DOS 2.0 OR 2.1 OR 3.0 FOR VER 3.00C OF ML 2). LABEL IT ACCORDING TO THE ORIGINAL 'MULTILINK' DISKETTE 3). COPY THE FILES FROM THE ORIGINAL DISKETTE TO THE CORRESPONDING 2.X FORMATTED DISKETTE OR 3.X DISKETTE. 4). PLACE THE ORIGINAL 'MULTILINK' DISKETTE BACK IN THE MANUAL WE WILL NO LONGER USE THEM. 5). I WONT TELL U HOW TO USE DEBUG OR ANY 'PATCHER' PROGRAMS ON THE BBS'S. 6). FIRST WE WILL NEED TO CHANGE A PROGRAM CALLED 'MLINK.COM' 7). DEBUG MLINK.COM 8) THIS is for one version of 2.08 E 32BE 5A:20 5A:20 5A:20 E 3A11 E8:F8 FF:90 00:90 E 3A19 E8:F8 F7:90 00:90 E 3A39 75:90 E9:90 E 3A4B 7C:90 47:90 E 3AEA 74:90 0B:90 E 3AF4 FA:90 EB:90 FE:90 8A) THIS is for another version of 2.08 ( 2.08c it would appear) E 32F6 5A:20 5A:20 5A:20 E 3A49 E8:F8 FF:90 00:90 E 3A51 E8:F8 F7:90 00:90 E 3A71 75:90 E9:90 E 3A83 7C:90 47:90 E 3B22 74:90 0B:90 E 3B2C FA:90 EB:90 FE:90 8b) THIS is for a version of 3.00 ( 3.00c it would appear) E 33C0 5A:20 5A:20 5A:20 E 3B69 E8:F8 FF:90 00:90 E 3B71 E8:F8 F7:90 00:90 E 3B91 75:90 E9:90 E 3BA3 7C:90 47:90 E 3C42 74:90 0B:90 E 3C4C FA:90 EB:90 FE:90 9). W 10). Q NOTE: NOW ALL OF 'MULTILINK' COPY PROTECTION IS REMOVED, AND U MAY DISKCOPY THE UNPROTECTED DISKS AS REQUIRED. OTHER NOTES: ------------------------------------------------------------------------- 1). CHECKS FOR SPECIALLY FORMATTED TRACKS COMPLETELY REMOVED 2). U MAY LOAD ALL THE FILES ON THE NEWLY FORMATTED AND UNPROTECTED DISKETTE DIRECTLY TO HARD OR RAM DISK, IN ANY SUB-DIRECTORY U SET UP. 3). 'MULTILINK' DISK NO LONGER REQUIRED TO BE IN DRIVE WHEN INVOKING IT. ENJOY YOUR NEW FOUND FREEDOM..HARD DISKS FOREVER!!!!! *********************** MultiLink version 3.01 *********************** The following is a method to unprotect MultiLink ver 3.01 to allow booting directly from a hard disk without the need to insert the MultiLink distribution diskette. ENTER COMMENTS ---------------- ------------------------------------ C>copy mlink.com mlink.bak Make a backup first! C>debug mlink.com Start the debug session. -u 4269 Unassemble from address 4269; you should see the following. If you don't, enter 'q' to quit the debug session. xxxx:4269 8036A14132 XOR BYTE PTR [41A1],32 xxxx:426E B90329 MOV CX,2903 xxxx:4271 E81E00 CALL 4292 <-+ xxxx:4274 732D JNB 42A3 |_ need to xxxx:4276 B90829 MOV CX,2908 | change xxxx:4279 E81600 CALL 4292 <-+ xxxx:427C 7325 JNB 42A3 xxxx:427E FE0E602F DEC BYTE PTR [2F60] xxxx:4282 7FEA JG 426E xxxx:4284 FE065F2F INC BYTE PTR [2F5F] xxxx:4288 803E5F2F01 CMP BYTE PTR [2F5F],01 -e 4271 f8 90 90 Change CALL 4292 to CLC, NOP, NOP -e 4279 f8 90 90 Change CALL 4292 to CLC, NOP, NOP -u 42a0 Unassemble from address 42a0. xxxx:42A0 CD21 INT 21 xxxx:42A2 C3 RET xxxx:42A3 A17333 MOV AX,[3373] xxxx:42A6 39067038 CMP [3870],AX <- need to xxxx:42AA 75D8 JNZ 4284 <- change --+ xxxx:42AC 8036A14132 XOR BYTE PTR [41A1],32 <---+ xxxx:42B1 EB02 JMP 42B5 xxxx:42B3 51 PUSH CX xxxx:42B4 06 PUSH ES xxxx:42B5 B8E8FF MOV AX,FFE8 xxxx:42B8 50 PUSH AX xxxx:42B9 8B365600 MOV SI,[0056] xxxx:42BD E871EC CALL 2F31 -e 42a6 90 90 90 90 90 90 90 90 90 90 90 Change CMP [3870],AX, JNZ 4284, & XOR BYTE PTR [41A1],32 to all NOPs (11 bytes) -u 4370 Unassemble from address 4370. xxxx:4370 F8 CLC xxxx:4371 3B17 CMP DX,[BX] xxxx:4373 740B JZ 4380 xxxx:4375 8D161638 LEA DX,[3816] xxxx:4379 B409 MOV AH,09 xxxx:437B CD21 INT 21 xxxx:437D FA CLI <-- need to xxxx:437E EBFE JMP 437E <-- change xxxx:4380 C606DB0DFF MOV BYTE PTR [0DDB],FF xxxx:4385 33C0 XOR AX,AX xxxx:4387 803E9C0D00 CMP BYTE PTR [0D9C],00 xxxx:438C 740B JZ 4399 xxxx:438E B80031 MOV AX,3100 -e 437d 90 90 90 Change CLI, JMP 437E, to NOP, NOP, NOP -e 3916 20 20 20 Also change "ZZZ" to blank-blank-blank. -w Write out the changes. -q Quit the debug session. *End of MLINK301.UNP*