Mouse Systems 404015-001 1-Button Mechanical Bus Mouse PS/2 Vintage PC

Mouse Systems 404015-001 1-Button Mechanical Bus Mouse PS/2 Vintage PC

The Mouse Systems 404015-001 is a single-button mechanical bus mouse made by Mouse Systems Corporation of Fremont, California. It uses a ball-tracking mechanism and connects via a 6-pin DIN bus interface, distinguishing it from the later PS/2 and serial mouse standards. The design is clean and minimal — one button, no scroll wheel — typical of early PC pointing devices from this era.

Specifications & What's Included

• Manufacturer: Mouse Systems Corp (Fremont, CA 94538)
• Part Number: 404015-001
• FCC ID: FSUGMZB8
• Buttons: 1
• Tracking Method: Mechanical (ball)
• Interface: Bus
• Connector: 6-pin DIN bus connector
• Country of Manufacture: Taiwan, R.O.C.
• Mouse only — no driver disk, software, or adapter included

Applications

Mouse Systems Corporation was one of the earliest manufacturers of computer mice, and the bus mouse format predates the widespread adoption of the serial and PS/2 mouse standards. Bus mice like this 404015-001 were designed to connect through a dedicated ISA bus card installed in the PC, rather than through a serial or PS/2 port. They were common on IBM PC-compatible systems through the mid-to-late 1980s and into the early 1990s, and were often bundled with early graphical software environments. Today these mice are sought by collectors and enthusiasts restoring period-correct vintage PC systems — particularly those running early versions of DOS-based GUIs or early Windows. A bus mouse adapter card is required to use this mouse; it is not compatible with standard PS/2 or serial ports without an adapter.