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Mon 06 October 2025
Montreal / Canada By shazz & draedon 2 min read Tags

Exorcist

Basic Information

  • Version 3.0
  • Author: IKI & Caledonia
  • Program language: English
  • Release date: October 1991
  • Recognizes 149 boot sectors

Main Text

EXORCIST III is a professional antivirus for Atari ST, developed by IKI & Caledonia as a continuation of the popular EXORCIST series. The program has expanded capabilities compared to previous versions. The cursor is in the shape of a skull.

Interface

The interface here is like in an airplane cockpit, but we'll go through each function!

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  • Ex

  • Buffer-Boot

  • Library-Boot

  • Chr/Asm

  • Exorcist pro by IKI and Caledonia (C) 1991

  • Executable Yes/No

  • Write

  • Kind

  • Check

  • Load

  • Name

  • Select

  • Merge

  • Save

  • Integr

  • Move

  • Clear

  • Lib ↑ ↓

  • Boot ↑ ↓

  • Running line

What are they doing?

  1. Exit the program

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  1. Disk information

    1. Sides can be toggled (1-2)

    2. Tracks can be increased and decreased

    3. Sectors can be increased and decreased

  2. Boot sector information from .LIB file

    1. Sides can be toggled (1-2)

    2. Tracks can be increased and decreased

    3. Sectors can be increased and decreased

  3. Can view boot sector in ASCII or as assembly code

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  1. If you click this button, the text will briefly change to "Exorcist in action"

  2. Changes the boot sector's checksum to make it Executable/Not Executable

  3. Can modify the boot sector. For example, delete it

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  1. We can manually select the boot sector type

  2. Check boot sector and display its type, sides, tracks, and sectors

  3. Load boot sector/Library .LIB

  4. We can rename a boot sector and save it with that name.

  5. We can select a boot sector from the library and view it by clicking the right mouse button

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  1. Merge .LIB libraries

  2. Save .LIB library

  3. Integrate .PRG file

  4. Allows moving boot sectors within the library

  5. Clear .LIB library

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  1. Can browse through the .LIB library examining different boot sectors from it

  2. Allows viewing the entire boot sector

  3. You can click on it too! And we will see this:

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Vaccine

This antivirus has its own vaccine, and when you boot up, you'll see this:

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Virus Test

The “Bootsector” tab. Here you can examine the boot sector, and we will immediately check for a new virus for this program. Virus Killer emitted a long beep and displayed the disk diagnostics.

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  • ACA

  • Macumba 3.3

  • Merlin's Mad

  • Non-Executable EICAR Virus

  • Oli

Test Results

  1. Exorcist said it is a virus.

  2. Exorcist said it is an unknown executable boot sector.

  3. Exorcist said it is an unknown executable boot sector.

  4. Exorcist said it is a virus/antivirus.

  5. Exorcist said it is a virus/antivirus.

In conclusion

A fairly decent antivirus whose distinctive feature is the ability to view the boot sector as assembly code. 4,5/10