Introduction

This is a passive board that sits under one of the 6532/10750 RIOT chips in the Commodore PET disk drive allowing the device ID number to be changed without cutting the jumpers on the PET drive mainboard. Instead the signals are routed to three pairs of pin headers, which can then be used with jumpers or wired to DIP switches (not included) to change the device ID. Note the 2031, 2031LP and 4031 are not compatible with this ID switcher.

Installation

Remove the 6532/10750 RIOT at UE1 on the 2040, 3040, 4040, 8050, 8250, or UAB17 on the 8250LP, or 4J on the SFD-1001. If the 6532 is not already in a socket, you will need to install one first. Insert the device ID switcher into the mainboard socket and the 6532 into the device ID switcher socket making sure the notches are correctly aligned and no pins are bent.

Usage

The three sets of pin headers determine the device ID. They can then be opened or closed using jumpers or wired to external DIP switches.

The following device ID configurations are available:

• All closed = 8
• J1 closed, J2 closed, J3 open = 9
• J1 closed, J2 open, J3 closed = 10
• J1 closed, J2 open, J3 open = 11
• J1 open, J2 closed, J3 closed = 12
• J1 open, J2 closed, J3 open = 13
• J1 open, J2 open, J3 closed =14
• All open = 15

Note external wiring and DIP switches are not included. The board will come with all 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.

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All information above is subject to change without notice.