A Processor Direct Slot (PDS) is a single expansion slot found in early Macintosh models. It was primarily used to attach high-speed peripherals such as monitors, scanners, and additional CPUs to Mac models that were not powerful enough to handle such upgrades. The PDS connector was developed by Apple circa 1987 and was commonly found in early Macintosh models such as the Macintosh LC.
While the PDS was largely CPU-dependent, it managed to endure numerous CPU iterations on the Mac LC. As such, it became a useful addition for users seeking to upgrade their Macs to better handle more advanced software and hardware configurations. The PDS provided a direct connection to the CPU and coexisted with NuBus slots in some devices, thereby offering faster and more direct access to the CPU.
In addition, the term PDS also stands for Premises Distribution System. It refers to the wiring, racks, and adapters that link telephone wires inside a single building or a collection of buildings to one another and to the telephone company’s external lines. This is a separate application of the PDS term from Mac models.
FAQs
What was the main purpose of the PDS?
The main purpose of the PDS was to attach high-speed peripherals and additional CPUs on some early Mac models such as the Macintosh LC. This allowed users to upgrade their Macs to better handle more advanced software and hardware configurations.
What does PDS stand for in the context of telephone wiring?
PDS stands for Premises Distribution System in the context of telephone wiring. It refers to the wiring, racks, and adapters that link telephone wires inside a single building or a collection of buildings to one another and to the telephone company’s external lines.
Conclusion
Understanding the Processor Direct Slot and its applications in early Mac models is essential for those interested in the history of computing and technology. The PDS was a significant development in the Macintosh line and allowed for greater expansion and customization of Mac devices. Today, the PDS is a term used in a separate context with regard to telephone wiring.
