The Core Memory Project

 

 
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The Gallery
Special Thanks To

Patrick Steinbrenner for his contribution to this page.

Martin Bennett for his contribution to this page.
Oscilloscopes

These are one of the Tektronix’s earliest laboratory-grade solid - state portable oscilloscopes. They were the standard 'scopes for field service technicians for about 30 years.
Tektronix 453
Tektronix 453a
Tektronix 502a
NCR 353-3 CRAM

Card Random Access Memory

Introduced by NCR in 1962 the CRAM was the first mass storage device.

It offered reliable random access storage at a time when magnetic tapes were the primary storage medium. Up to 16 CRAM units could be online.

Each CRAM unit held one 5.5MB cartridge that contained 256 mylar, 3x14" cards with a magnetic recording surface. The cards were suspended from eight rods, which were selectively moved to release a specific card. The card was pulled out, wrapped around a rotating drum and read or written. The drum had 56 fixed read / write heads.

Control panel from the NCR 315 CRAM unit.
CRAM Control Panel

Electronic Boards 

NCR 315
Ferrite Core Memory Array Ferrite Core Memory Array
Ferrite Core Memory Array Ferrite Core Memory Array
Ferrite Core Memory Array Adder
Enable Driver Holdover
Relays Auxiliary memory sense wire amplifier
Shift Register Shift Register
Read Write Switch Flip Flop
Skew Test Card Solenoid Driver Control
Pre Amps & Gates Pre Amps & Gates
PCB Shift & Clear Driver
Gold plated switch contacts NCR 340 Printer Engineers Diagnostic Panel

NCR Century 150
NCR Century 150 Core Memory Board
NCR Century 150 Core Memory Board

Miscellaneous Boards
Test-Card (Probably for a Tape-Unit) Test-Card (Probably for a Tape-Unit)
Xtal Timer (Clock) Assembly Xtal Timer (Clock) Assembly
Oscillator Test-Card with Xtal-Socket Oscillator Test-Card with Xtal-Socket
Power-Driver Card for Printer unit Power-Driver Card for Printer unit
NCR 230 Cash Register

Various Disc Heads
NCR 50xx-56xx640 NCR 56xx-58xx640

NCR PC710 - 286 Main Processor Card & 3299-K071 CGMA Board
NCR PC710 - 286 Main Proc. NCR PC710 - 286 Main Proc.
3299-K071 CGMA Board 3299-K071 CGMA Board

NCR PC916 - 386 Main Processor & Memory Cards; 3299-K131 - 512 KB Upgrade
NCR PC916- 386 Main Proc. NCR PC916- 386 Main Proc.
NCR PC916- 386 Memory NCR PC916- 386 Memory
3299-K131 - 512 KB Upgrade 3299-K131 - 512 KB Upgrade
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