PC Parts Inc 212-00040 8-Bit ISA Video Card RGB DB-9 Mono Composite MC6845P CGA

PC Parts Inc 212-00040 8-Bit ISA Video Card RGB DB-9 Mono Composite MC6845P CGA

The PC Parts Inc 212-00040 is a full-length 8-bit ISA video card designed to support multiple simultaneous display output types from a single expansion slot. Built around the Motorola MC6845P CRT Controller (CRTC), it provides three output ports on its bracket: a DB-9 RGB connector, a DB-9 monochrome connector, and a composite (RCA-style) output — making it a multi-standard display adapter capable of driving different monitor types. The board carries a dense population of DIP ICs across its full length.

Specifications & What's Included

• Manufacturer: PC Parts Inc
• Assembly / Part Number: 212-00040 (silkscreen: ASSY 212-00040 REV)
• Bus Interface: ISA 8-Bit (full-length card)
• Main Controller: Motorola MC6845P CRT Controller (CRTC)
• Secondary IC: Motorola MC74F153N multiplexer (date code I8433 — circa 1984)
• Video Output 1: DB-9 female — RGB
• Video Output 2: DB-9 female — Monochrome (MONO)
• Video Output 3: Composite output — COMP 1 (RCA/BNC-style port)
• Compatible display standards: CGA, MDA / Monochrome
• Board condition: physically intact, no obvious cracked traces; light dust from storage
• NOTE: Does not produce video output — sold AS-IS for parts or repair only

Applications

The MC6845P CRTC was a core component in early 1980s PC display adapters, used across CGA, MDA, Hercules, and many OEM-proprietary video cards of the era. This card dates from approximately 1983–1985, the period when IBM PC/XT-compatible systems were the dominant platform and 8-bit ISA (then called the PC bus) was the standard expansion interface. Multi-output cards like this one were used in environments that needed to drive more than one display type simultaneously — for example, running an RGB color monitor alongside a composite monitor or a green-screen monochrome display from a single card. They were common in early office workstations, point-of-sale terminals, and specialized industrial or data-entry systems where different operators might use different monitor types on the same machine. Today, cards of this type are sought by vintage PC collectors, retrocomputing enthusiasts, and researchers restoring XT-class machines. The MC6845P itself is still a recognized and well-documented chip, and boards built around it are of interest for repair, study, and parts salvage.