Official Commodore Plus/4 Accessories and Peripherals

The Commodore Plus/4, released in 1984, was designed as a productivity-focused home computer, and Commodore supported it with a specific range of hardware add-ons. This article details the official peripherals manufactured by Commodore for the Plus/4, including storage devices, connectivity modules, and expansion cartridges. Readers will gain insight into the unique ecosystem surrounding the TED-based machine and how these accessories expanded its capabilities beyond the built-in software suite.

Storage Peripherals

The most critical accessories for the Commodore Plus/4 were its storage solutions, which differed significantly from the popular Commodore 64 ecosystem. The primary disk drive was the Commodore 1551. Unlike the ubiquitous 1541 drive used with the C64, the 1551 utilized a faster serial bus protocol tailored for the Plus/4, C16, and C116 models. This allowed for significantly quicker load and save times, making the system more viable for business applications and data management.

For budget-conscious users, Commodore offered the 1531 Datasette. While visually similar to the 1530 tape drive used with other Commodore machines, the 1531 featured a different connector to match the Plus/4’s dedicated cassette port. This peripheral provided an affordable means of storing programs and data on standard audio cassettes, maintaining compatibility with the vast library of software distributed on tape during that era.

Connectivity and Communication

To fulfill the Plus/4’s marketing promise as a home office computer, Commodore released the 1664 Modem. This 300-baud modem connected directly to the expansion port, allowing users to dial into bulletin board systems (BBS) and online services without requiring additional interface hardware. The 1664 was designed to integrate seamlessly with the machine’s built-in telecommunications software, providing a turnkey solution for remote communication that was rare in budget computers of the mid-1980s.

Expansion and Memory

Although the Plus/4 came with 64KB of RAM standard, Commodore offered expansion options to enhance performance for specific tasks. Official 16KB RAM cartridges were available that plugged into the expansion port. These cartridges were often used to provide additional memory for applications or to serve as cartridge-based software titles. While game cartridges were less common for the Plus/4 compared to the C64 due to the architecture of the TED chip, the expansion port remained a vital interface for adding functionality such as EPROM programmers or specialized hardware interfaces developed by Commodore.

Printer Compatibility

Commodore did not manufacture a printer exclusively for the Plus/4, but the system was fully compatible with the company’s line of serial printers. Models such as the MPS 801, MPS 802, and MPS 803 could be connected via the serial port, sharing the same bus used by the 1551 disk drive. This allowed users to daisy-chain storage and printing peripherals, creating a complete workstation setup using official Commodore hardware standards.

Conclusion

The accessory lineup for the Commodore Plus/4 reflected its positioning as a serious tool for home productivity rather than solely a gaming machine. With the high-speed 1551 disk drive, the dedicated 1531 Datasette, and the integrated 1664 Modem, Commodore provided a cohesive hardware environment. While the system’s market lifespan was short, these official peripherals remain key components for collectors and enthusiasts preserving the legacy of the TED-series computers.