Compaq 148077-001 System Board Motherboard Deskpro XL590 XL566 Rev R

Compaq 148077-001 System Board Motherboard Deskpro XL590 XL566 Rev R

This is the OEM Compaq system board (part number 148077-001, Rev R) for the Deskpro XL590 and XL566 desktop computers. It is a direct factory replacement or spare for these proprietary Compaq Deskpro XL series machines and carries the secondary board reference 004033-001 printed on the PCB.

Specifications & What's Included

• Manufacturer Part Number: 148077-001
• Secondary Board Reference: 004033-001
• Hardware Revision: Rev R
• Compatible Systems: Compaq Deskpro XL590, Compaq Deskpro XL566
• Expansion Slots: 4x ISA slots
• Rear I/O: PS/2 keyboard port, PS/2 mouse port, 2x DB9 serial ports, 2x DB25 parallel ports
• Form Factor: Proprietary Compaq Deskpro XL desktop format
• System board only — no CPU, RAM, cables, or mounting hardware included

Applications

The Compaq Deskpro XL series was a line of high-performance Pentium-class desktop workstations produced by Compaq in the mid-1990s, targeting business and professional users who needed reliable, expandable desktop computing. The XL590 and XL566 designations reflect their Pentium processor speeds (566 MHz and 590 MHz class configurations), and these machines were commonly deployed in corporate desktop environments running Windows 95, Windows NT, and DOS-based business software. Replacement system boards like this one are sought today by technicians and collectors maintaining legacy Compaq Deskpro XL hardware, whether for institutional continuity, retrocomputing projects, or parts sourcing. The ISA expansion slots on this board reflect the mid-1990s era, when ISA was still the dominant bus standard before PCI became universal.