Commodore Amiga Floppy Disk Drive Bootblock (Track Zero) Virus Protector.

Hello,

This is a tested and working project. (Tested on a Commodore Amiga 500)

Commodore Amiga Floppy Disk Drive Bootblock (Track Zero) Virus Protector is an Easy DIY project, all components are through hole, marked on the PCB, Easy to solder, Easy to make ;)

This Amiga virus Protector protects your floppy disks from Bootblock Viruses.

This virus protector must be plugged into your Amiga external floppy drive connector.

The switch works as a special boot block write protector. With the switch on, Amiga cannot overwrite the Zero (boot-block) track, so the boot-block virus cannot infect your floppy disk.

The disk bootblock is not protected when the switch is off, but if some kind of boot-block virus copies itself to your floppy disk, this protector will alert you with a beep sound and a light.

You can simply test this circuit with X-COPY, just try to write on track zero.

COMPONENTS:

DB23M 23 pin D-sub male connector **

74LS02 (DIP14)

1N4148 DIODE

Active Buzzer 3Volts

3mm WHITE LED (A bright LED should be better)

ON/OFF SWITCH (3pin 2.54mm SPDT slide SWITCH)

This PCB

** There are several methods to obtain 23 pin D-sub male connector:

25 pin D-sub male connector's pins and the 3D model link below.

https://www.thingiverse.com/thing:1238286

Or you may chose this method.

https://archive.org/download/db23m/DB23M.jpg

If you have a programmer capable of testing IC chips, such as the 74LS series, you should remember to test them before soldering. Some chips may be defective. (TL866 Minipro Programmer can test some logic ICs)

In order to protect your electronical devices, always turn off your Amiga before connecting or disconnecting the cables or any other device.

Gerber files and component list are subject to change without notice. Before paying for the PCBs, be sure to update your orders!

As you can see I have uploaded many projects and I am still working on new projects. If you have any questions, please look for answers online. Unless I specify explicitly, all my projects are tested and confirmed to work under normal circumstances before being shared. I'm sorry I didn't have enough time to answer all the questions.

Use this PCB at your own risk !

Have fun

Thank you.