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Apple Mouse III

Apple Mouse III is a slot mouse card for the Apple //e (and compatible machines). GSSquared emulates the Mouse III hardware and firmware so mouse-aware //e software can use your host mouse.

What it does

  • Provides a Mouse III card in an expansion slot (commonly slot 4).
  • Works with software that talks to the Apple mouse firmware entry points (IN#n / mouse toolkit calls).
  • On the IIgs, you normally use the built-in ADB mouse instead — see Using a Mouse.

Older configs that named the card "applemouseiii" still work; the preferred value is "mouse".

How to enable it

In the config editor

  1. Open + or Edit… from System Select.
  2. Choose an Apple //e or Enhanced //e platform (or another non-GS machine that allows the card).
  3. Click a slot (often 4) and pick Apple Mouse / Mouse.
  4. Save and launch.

A sample config ships as IIe_AppleMouseIII.gs2 (Mouse III in slot 4).

In a .gs2 file

[[cards]]
slot = 4
card = "mouse"

How to use it

  1. Boot software that supports the Apple mouse card.
  2. Turn on Mouse Capture (F1, or Machine → Capture Mouse) so movement stays in the window.
  3. Exit capture with F1 (or open the Control Panel with F4, which releases capture temporarily).

For general capture behavior and IIgs GS/OS tracking, see Using a Mouse.