PET Dual 9 way D Userport Joystick

Name: PET Dual 9 way D Userport Joystick
SKU: 36658
Price: 20.00 USD
Availability: InStock

A dual 9 way D joystick adapter for the PET and Mini PET Userport

Designed by Tynemouth Software in United Kingdom

2024-11-22T21:08:46.134Z-PET Dual Joystick with Piezo Assembled.jpg

2024-11-22T21:35:27.670Z-PET Dual Joystick Assembled.jpg

2024-11-22T21:08:46.134Z-PET Dual Joystick with and without Piezo.jpg

2024-11-22T21:08:46.134Z-PET Dual Joystick with and without Piezo Labelled.jpg

2024-11-22T21:08:46.134Z-PET Dual Joystick Kit.jpg

2024-11-22T21:08:46.134Z-PET Dual Joystick with Piezo Kit.jpg

2024-11-22T21:08:46.134Z-PET Dual Joystick Installed.jpg

2024-11-22T21:08:46.134Z-Mini PET 4080 with SD2PET and dual joystick.JPG

2024-11-22T21:08:46.134Z-Mini PET, SD2PET, Joystick.jpg

2024-11-22T21:44:18.451Z-PET with dual userport joystick and SD2PET.jpg

2024-11-22T21:44:18.451Z-PET 2001 with all the bells and whistles.jpg

2024-11-22T21:08:46.134Z-PET Dual Joystick with Piezo PCB Rear.jpg

2024-11-22T21:08:46.134Z-Connector side on.jpg

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A dual 9 way D joystick adapter for the PET and Mini PET Userport

What is it? This is a dual 9 way D joystick adapter for the PET and Mini PET userport. There is a version which includes a piezo sounder for PETs that do not have an internal one. Later PETs and Min…

What is it?

This is a dual 9 way D joystick adapter for the PET and Mini PET userport.

There is a version which includes a piezo sounder for PETs that do not have an internal one. Later PETs and Mini PETs already include a sounder, so you do not need to duplicate it.

Why did you make it?

To allow joysticks to be used with the PET and Mini PET.

What makes it special?

This is constructed with through hole parts (not included). The diodes are used to generate the fire signals, and the resistors protect the userport if it is configured as an output.

The value read is the position information from a standard Commodore / Atari style joystick with the usual pinout:

1 = Up
2 = Down
3 = Left
4 = Right
5 = N/C
6 = Fire
7 = N/C
8 = GND
9 = N/C

There is no power on the userport of the PET, so no autofire etc.

The value is read from port 0xE841 (59457), and can be calculated using 255-PEEK(59457).

The values returned from this are as follows:

0x01 (1) = Port 1 Up
0x02 (2) = Port 1 Down
0x04 (4) = Port 1 Left
0x08 (8) = Port 1 Right
0x03 (3) = Port 1 Fire
0x10 (16) = Port 2 Up
0x20 (32) = Port 2 Down
0x40 (64) = Port 2 Left
0x80 (128) = Port 2 Right
0x30 (48) = Port 2 Fire

This is supported under Vice for development as "PET userport joystick", and in the following games (and many others):

The piezo is wired to pin CB2, as used in games such as Space Invaders. The piezo is not required for Mini PETs or PET/CBM 4000/8000s as they already have an internal piezo sounder.

What is included

This listing is for the full kit or ready assembled dual joystick interface. No PETs, Mini PETs, joysticks or games or anything else is included.

More information

More information on my blog: http://blog.tynemouthsoftware.co.uk/2022/08/commodore-pet-dual-userport-joystick.html

See this post for more information on driving the Piezo - http://blog.tynemouthsoftware.co.uk/2022/05/pet-sounds.html

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Tracked shipping is recommended on international orders. Parcel will include full value declaration and may be liable to additional delays or customs fees upon arrival. Please be aware of this before ordering, there is nothing I can do about it.