69 lines
2.0 KiB
Plaintext
69 lines
2.0 KiB
Plaintext
BANNER.UNP
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Program: Banner Builder from Power Up (tm)
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Copyright 1983 Software Publishing Corp. A:01
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Instructions:
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Copy BANNER.EXE to some other disk where DEBUG can get to it.
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Rename BANNER.EXE to something other than an .EXE extension.
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DEBUG does not allow writing to an .EXE file.
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I will name it BANNER.DBD
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Type:
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-DEBUG BANNER.DBD
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Type:
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-S CS:0 L FFFF CD 13
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This DEBUG command searches BANNER.DBD for all INT 13's.
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If you don't know, INT 13 is the disk sector read interr
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You should find 3 such interrupts at the following locat
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XXXX:AA44
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XXXX:AC72
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XXXX:AC80
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The XXXX above is different on every machine depending on wher
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DOS decides to load it into memory.
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The 3 Hexadecimal number following the XXXX: indicate the of
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location of each INT 13.
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The second number, AC72, is the first diskette sector read t
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BANNER.EXE makes.
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We are going to change the CD 13 bytes to EB 15 which will c
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the program to jump over all the diskette sector reads and g
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right into BANNER without looking at drive A:.
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For your information, EB 15 tells the program to jump over 1
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bytes.
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Enter the following:
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-E AC72
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XXXX:AC72 CD.EB 13.15
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Make sure to press the space bar after entering EB and a car
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return after entering the 15.
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The space bar moves DEBUG to the next byte.
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The carriage return terminates the entering of bytes and ret
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you to the DEBUG prompt.
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Now, write the file.
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Enter the following:
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-W
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Writing 16180 bytes
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Then quit by entering the following:
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-Q
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You should now be at your DOS prompt.
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Now, rename BANNER.DBD back to BANNER.EXE and you now have a
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clean program, one that will not look to drive A: for the orig
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diskette.
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Remember, do not distribute this program freely. It's against the law.
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These instructions are only intended to make the use of this program easier.
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Author: BABY HACK
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