Overview
The Control Data Corp 91979056 flip chip core memory module (H222 A Rev C) is a classic vintage memory component featuring 16kx18 bit organization. This module represents the ferrite-core memory technology that powered minicomputers and early digital systems during the 1960s and 1970s. The unit is designed for DEC Unibus-based systems and is ideal for computer historians, vintage system restorers, and collectors preserving the legacy of digital computing.
Key Features
- 16kx18 bit storage capacity utilizing ferrite-core technology
- Flip chip module design for standard Unibus connector compatibility
- Revision C (H222 A) configuration with full functionality
- Tested and verified for use in period minicomputer systems
- Historical significance as core memory from the Control Data product line
Technical Specifications
| Part Number | 91979056 |
| Manufacturer | Control Data Corporation |
| Module Type | Flip Chip Core Memory |
| Memory Capacity | 16kx18 bits |
| Memory Technology | Ferrite Core |
| Model/Revision | H222 A Rev C |
| Bus Interface | DEC Unibus |
| Module Form Factor | Flip Chip (Standard Dual Inline) |
| Condition | Used, Tested |
| Era | 1960s–1970s |
Typical Applications
- DEC PDP and UNIBUS-based system upgrades and restoration
- Vintage computing museum exhibits and educational demonstrations
- Computer history research and documentation
- System restoration and period-accurate reconfiguration
- Collection and preservation of early memory technology
Compatibility & Replacements
Compatible With
- DEC PDP-series minicomputers with UNIBUS slots
- Systems supporting 16kx18 flip chip memory modules
- Period-compatible data acquisition and control systems
- Vintage computer restoration projects using core memory architecture
Replaces / Drop-In Replacement For
Verify compatibility with your specific system integrator or vintage computer documentation before ordering. H222 A Rev C modules were used in DEC-compatible systems; check your mainboard slot configuration and existing memory module revisions for compatibility confirmation.
Works With
- DEC Unibus protocol and address bus architecture
- Ferrite-core-based memory control logic from the 1960s–70s era
- Flip chip connector systems and standard dual-inline packaging
- Period documentation: DEC memory module manuals and schematics
