Emulex Persyst Mono II VGA ISA Video Card 9-Pin DB25 12-10086-02 Rev-D PC XT

Emulex Persyst Mono II VGA ISA Video Card 9-Pin DB25 12-10086-02 Rev-D PC XT

The Emulex Persyst Mono II is an ISA-bus combination display adapter designed for IBM PC, PC/XT, and PC/AT systems, supporting both monochrome and VGA output through dual bracket connectors. This card carries assembly number 12-10086-02 (Rev-D) and sub-assembly number PT1010228-00D, with the Emulex copyright dated 1985 — placing it squarely in the mid-1980s ISA expansion card era. It provides a DB9 connector for monochrome display output and a DB25 connector for the secondary video interface, allowing connection to period-correct monitors in multi-display or mono/color mixed configurations.

Specifications & What's Included

• Brand: Emulex
• Product Name: Persyst Mono II
• Assembly Part Number: 12-10086-02
• Sub-Assembly Number: PT1010228-00D
• Revision: Rev-D
• Bus Interface: ISA (8/16-bit edge connector)
• Output Connector 1: DB9 (9-pin) — monochrome display
• Output Connector 2: DB25 (25-pin) — secondary video output
• Video Standard: Monochrome / VGA
• Compatible Systems: IBM PC, PC/XT, PC/AT, and ISA-bus compatibles
• Era: Mid-1980s (Emulex copyright 1985 visible on board)
• Card only — no monitor cables, drivers, or documentation included

Applications

The Persyst Mono II was developed by Emulex to address the common early-PC need for running both a monochrome text display and a separate color/graphics monitor simultaneously — a configuration widely used in DOS-era office and technical environments where users wanted a dedicated high-resolution text screen alongside a color CGA or EGA display. The dual-connector design allowed a single ISA card to drive two monitors, saving a slot compared to using two separate cards. Cards of this type were used in IBM PC/XT and AT systems throughout the mid-to-late 1980s, typically in business, engineering, and software development settings where CGA graphics and sharp monochrome text were both required at once. Today, these cards are sought by collectors and retrocomputing enthusiasts restoring period-accurate IBM PC systems, as well as by anyone maintaining legacy DOS-based equipment that requires original ISA video hardware. The ISA bus standard dominated PC expansion from roughly 1981 through the mid-1990s, when PCI and later AGP rendered it obsolete in consumer systems.