IBM 34F0008 MCA Dual High Speed Serial Card 33F8702

IBM 34F0008 MCA Dual High Speed Serial Card 33F8702

This is a dual-channel serial controller card designed for IBM PS/2 systems equipped with Micro Channel Architecture (MCA). The 34F0008 provides high-speed RS-232 serial communication, enabling connection of multiple serial devices such as modems, terminals, or printers to a PS/2 workstation or server. It is a standard component for PS/2 expansion and maintains the dual-port architecture typical of IBM's enterprise-grade serial adapters from the late 1980s and early 1990s.

Specifications & What's Included

• Brand: IBM
• Model: 34F0008
• Manufacturer Part Number: 33F8702
• Card Type: MCA adapter / controller card
• Interface: Dual high-speed serial RS-232
• Number of Ports: 2 (two independent serial channels)
• Bus Architecture: Micro Channel (MCA)
• Compatibility: IBM PS/2 systems with MCA slots
• Condition: Tested and in good working order
• Inclusions: Card only (no cables or documentation included)

Applications

The IBM 34F0008 is a classic PS/2 serial expansion card from the era when IBM PS/2 systems were the standard for office and enterprise computing. Dual serial ports on a single card were essential for connecting peripherals that relied on RS-232 communication—modems, external storage devices, industrial equipment, lab instruments, and older network adapters. This card type remains valued by users maintaining vintage PS/2 systems, whether for legacy application support, data recovery from older systems, or preservation of period computing environments. The MCA bus standard was IBM's proprietary alternative to the ISA bus and was used exclusively in PS/2 lines from the late 1980s through the mid-1990s.