Overview
The DEC 5013326D-P4 is KDF11 CPU processor board for Digital Equipment Corporation PDP-11 and LSI-11 systems. Designated as model M8186, this board functions as the central processing unit for QBUS-based computers and includes memory management and floating-point processing capabilities. Originally manufactured circa 1984, this board represents core processor architecture from DEC’s legacy PDP-11 line.
Key Features
- KDF11 CPU chipset with F-11 microprocessor architecture
- Memory Management Unit (MMU) for address translation and protection
- Floating-point processor support (KEF11 compatibility)
- QBUS connector standard for PDP-11 and LSI-11 systems
- Dual-height form factor, Side 2 configuration
- Contains populated integrated circuits including gold-plated pins
Technical Specifications
- Manufacturer: Digital Equipment Corporation (DEC)
- Part Number: 5013326D-P4
- Model Designation: M8186
- CPU Type: KDF11 (F-11 chipset)
- Interface: QBUS (16-bit bus)
- Form Factor: Dual-height circuit board
- Manufacturing Date: Circa 1984
- Configuration: Side 2 (paired with Side 1 board)
- Memory Features: MMU with memory management, floating-point co-processor support
Typical Applications
- PDP-11/23 minicomputer systems
- LSI-11 embedded and OEM systems
- Laboratory and industrial control systems using legacy PDP-11 platforms
- System restoration and vintage computer collection maintenance
- Educational demonstrations of 1980s CPU architecture
Compatibility & Replacements
Compatible With
- PDP-11/23 minicomputer systems
- LSI-11 OEM and embedded computer boards
- Any QBUS-based Digital Equipment computer requiring KDF11 processor
- KEF11 floating-point accelerator modules
- KTF11 additional floating-point processor boards
Replaces / Drop-In Replacement For
- Other M8186 KDF11 boards damaged or non-functional
- Original Side 2 processor board in split-board PDP-11/23 configurations
- Note: Verify compatibility with your specific system configuration before installation
Works With
- QBUS backplane and cabling standards
- DEC RSX-11M operating system
- DEC RSTS/E operating system
- UNIX/XENIX on PDP-11 systems
- RT-11 real-time operating system
- Any software compiled for F-11 chipset processors
