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Super Serial Card

The Super Serial Card (SSC) is Apple’s classic slot serial card. In GSSquared it provides a virtual serial port you can attach to a file (capture), the clipboard, a modem (TCP “dial-up”), or a host serial UART.

What it does

  • Emulates the Apple Super Serial Card (MOS 6551 ACIA + stock firmware ROM).
  • Works in slots 1–7 on Apple II, II+, //e, and IIgs.
  • Shares the same connection types as the IIgs built-in serial ports: None, File, Clipboard, Modem, or a listed host serial port.

Use it with ProTERM, Spectrum, ADTPro, printer-to-file capture, or any software that talks to an SSC.

How to enable it

In the config editor

  1. Open + or Edit… from System Select.
  2. Click a slot and choose Super Serial.
  3. Under Serial / Parallel, click the port button for that slot and pick Modem, File, Clipboard, or a host serial port (see Serial & Parallel Connections).
  4. Save and launch.

In a .gs2 file

[[cards]]
slot = 2
card = "super_serial"

[[connections]]
slot = 2
device = "modem"

For file capture:

[[connections]]
slot = 2
device = "file"
path = "captures/ssc-output.bin"

If you omit [[connections]], native builds default the SSC to Modem.

Controlling the attachment while running

  1. Press F4 to open the Control Panel.
  2. Click the serial-port button for the SSC slot.
  3. Choose None, File, Clipboard, Modem, or a listed host serial port.

When a File attachment closes (idle timeout, reset, or you switch away from File), GSSquared shows a short on-screen toast with the capture filename. Clipboard copies the captured text to the host clipboard on close. Guest baud / line settings are passed through to a host serial port.

Using the virtual modem

With Modem attached, use Hayes-style commands from your terminal program. See Serial / Modem for ATDT host:port examples and hang-up.