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A2Mouse

Atari/Amiga PS2 mouse

A small project to use a PS2 mouse on Atari ST/Amiga.
I tested it only on Atari 260 ST, Atari 1040 ST & Amiga 500.
I used a PIC16F628A (it was a PIC which i had at hand), 4 resistors (220Ohm) and 4 leds.

The mouse will be initialized at:

- Sample Rate = 80 samples/sec
- Resolution = 2 counts/mm
- Scaling = 1:1
- Mode of operation = Remote

The data will be sent to computer at aroud 300 updates/sec

Leds are used to display the information which will be sent to computer:

  • Clicking a mouse button
  • X movement
  • Y movement

On booting the leds are used to indicate the error conditions:

  • Error led -> cannot reset the mouse
  • Error led & Button led -> cannot set sample rate
  • Error led & X axis led -> cannot set resolution
  • Error led & Y axis led -> cannot set remote mode

Compiled code

Here are the hex files which contain the compiled code for interfacing with Atari and Amiga

The schematic

Schematic

An example board

Board

Connection to Amiga/Atari port

The connection to Atari/Amiga port is the same and the communication is handled correctly from software.

Connection