Go4Expert - Using Debug to remove all Hard drive partitions

This is actually posted on Microsoft's website to remove Non-Dos partitions, but it will remove all partition tables. I have used it for years to damaged hard drives where the MBR is damaged and cannot be removed to be re-formated any other way.

Code:

Table 1: Debug Script to Erase Hard-Disk Partition Table         

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Debug         Enter Debug        Comments

Prompts       Commands

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      -              A 100                 Assemble from CS:0100.



nnnn:0100     INT 13                 Call interrupt 13.



nnnn:0102     press the                 (nnnn in the segment address).

              ENTER key



  -              RAX                 Replace AX register.



AX 0000



  :              0301                 Write on sector.



  -              RBX                 Replace BX register.



BX 0000



  :              0200                 Start from ES:200.



  -              F 200 L 200 0         We want to write zeros.



  -              RCX                 Replace CX register.



CX 0000



      :              0001                 Cylinder, 0, sector 1.



  -               RDX                 Replace DX register.



DX 0000



  :              0080                 First physical hard disk, head

                                 0. (Substitute 0081 for this

                                 entry if you are clearing the

                                 table on the second physical

                                 hard disk, 0082 if you are

                                 clearing the third physical

                                 hard disk, and so forth).



  -               P                 Proceed (Debug will display

                                 several lines of information).