The SIO bus was implemented using a custom 13-pin D-connector arrangement (although not D-subminiature) with the male connectors on the devices and the female connectors on either end of the cables.
The connectors were physically robust to allow repeated use, with very strong pins in the device socket and sprung connectors in the cables, as opposed to friction fit as in a typical D-connector.
Most devices had in and out ports to allow daisy chaining peripherals, although the Atari 410 Program Recorder had to be placed at the end of the chain and thus did not include an out port.
The SIO bus was implemented using a custom 13-pin D-connector arrangement (although not D-subminiature) with the male connectors on the devices and the female connectors on either end of the cables. The connectors were physically robust to allow repeated use, with very strong pins in the device socket and sprung connectors in the cables, as opposed to friction fit as in a typical D-connector. Most devices had in and out ports to allow daisy chaining peripherals, although the Atari 410 Program Recorder had to be placed at the end of the chain and thus did not include an out port.
Atari SIO