Agilar HQXAGM-240C 8-Bit ISA Bus Mouse Card 240C FCC ID ISA Slot PC

Agilar HQXAGM-240C 8-Bit ISA Bus Mouse Card 240C FCC ID ISA Slot PC

The Agilar HQXAGM-240C is an 8-bit ISA bus mouse interface card that adds a dedicated bus mouse port to a desktop PC via an ISA expansion slot. It mounts a 9-pin mini-DIN connector on the card bracket, allowing a bus-style mouse to be connected directly to the system without occupying a serial (COM) port. Model number on the label reads 240C; FCC ID is HQXAGM-240C; manufactured in Taiwan.

Specifications & What's Included

• Brand: Agilar
• FCC ID / Model: HQXAGM-240C (Model No. 240C)
• Bus Type: 8-Bit ISA
• Mouse Connector: 9-Pin Mini-DIN (bus mouse port) on card bracket
• Form Factor: Half-height ISA expansion card
• Main controller IC: RMC HP87304A (3433 C007) — large DIP IC visible on component side
• Country of Manufacture: Taiwan (per label)
• Includes: Card only — no mouse, cables, or drivers

Applications

ISA bus mouse cards like the HQXAGM-240C were a common feature of IBM PC-compatible desktop systems in the late 1980s and early 1990s, particularly in cases where all available COM ports were already in use. By routing the mouse signal through the ISA bus rather than a serial port, the card freed up COM1 and COM2 for modems, printers, or other peripherals — an important consideration on the DOS-era machines of that period, which were limited to two or three COM ports. These cards are relevant today primarily for vintage PC enthusiasts restoring period-correct machines, retrocomputing hobbyists, and collectors building or maintaining 286, 386, or 486-era systems that require a bus mouse interface. A compatible bus mouse (typically a round 9-pin mini-DIN type) is required; the card does not include or support PS/2 or USB mice directly.