Introduction

A passive board that sits under the 6522 VIA in the Commodore 1541 disk drive allowing the deivce ID number to be changed without cutting the jumpers on the 1541 mainboard and instead routing the signals to two pairs of pin headers, which can then be used with jumpers or wired to DIP switches.

Installation

Remove the 6522 VIA at UAB1 for 1541 longboards, or UC3 for shortboards. If the 6522 is not in a socket, it is recommended to install one after removal. Insert the device ID switcher into the mainboard and the 6522 into the device ID board.

Usage

The two sets of pin headers determine the device ID. They can then be opened or closed using pin header jumpers or wired to external DIP switches (may require cutting the 1541 case).

The following device ID configurations are available:

• Both closed = 8
• Both open = 11
• Top closed, bottom open = 10
• Top open, bottom closed = 9

It is possible to use DIP switches without modifications to the 1541 case but it's not ideal (see images). The fuse holder has some space between the case and holder which is just enough to sneak some 24AWG or thinner wires through. Obviously this is not the best way to do it, but it doesn't block access to any of the ports, and doesn't require any case cutting.

Note external wiring and DIP switches are not included. The board will come with jumpers installed so the deivce ID will be set to 8, remove the jumpers or optionally wire up DIP switches to change the device ID.

All boards are hand assembled and tested before shipping. As these are hand soldered, flux residue is included with every board at no additional charge ;-)