Kingston KTM-3077-2 MCA Memory Expansion Board IBM PS/2 Model 70 80 KTM3077

Kingston KTM-3077-2 MCA Memory Expansion Board IBM PS/2 Model 70 80 KTM3077

The Kingston KTM-3077-2 (also referenced as KTM3077) is a Micro Channel Architecture (MCA) memory expansion board designed specifically for the IBM PS/2 Model 70 and Model 80 desktop computers. Produced by Kingston Technology Corporation in 1990, this card adds additional RAM capacity to these IBM PS/2 systems via the proprietary MCA bus slot. The board carries PCB revision REV.B00 and part number 2001047.

Specifications & What's Included

• Manufacturer: Kingston Technology Corporation
• Part Number: KTM-3077-2 (also known as KTM3077)
• PCB Number: 2001047, Revision REV.B00
• Year: 1990 (per PCB copyright marking)
• Bus Interface: Micro Channel Architecture (MCA) — full-length card
• Compatible Systems: IBM PS/2 Model 70, IBM PS/2 Model 80
• Board features multiple DIP RAM IC rows and two SIMM expansion slots
• Blue MCA card guide brackets on both ends
• Board only — no cables, documentation, or mounting hardware included

Applications

The IBM PS/2 line, introduced in 1987, used the Micro Channel Architecture bus — a proprietary IBM design that replaced the earlier ISA bus with a more capable 16/32-bit bus featuring bus mastering and auto-configuration. The Model 70 and Model 80 were the higher-end 80386-based PS/2 systems aimed at business and professional workstation use. Memory expansion boards like this Kingston KTM-3077-2 allowed users to upgrade system RAM beyond what the motherboard alone provided, which was important for running OS/2, early Windows, and memory-intensive business applications of the era. Because MCA was a closed, proprietary standard, memory and expansion cards for PS/2 systems were made by a limited set of third-party vendors — Kingston Technology being among the most prominent. Today, these boards are sought by collectors, hobbyists, and those maintaining vintage IBM PS/2 systems.