01
 
02
 
03
 
04
 
05
 
06
 
07
 
08
 
09
 
10
 
11

Bipolar RAMs in High Speed Applications

IBM Components Division 64-bit RAM

Superimposed on its predecessor, a core memory array, this 64-bit RAM chip designed in 1968 served as the cache memory for the IBM System 370 Model 145.

Tech Talk: Bipolar RAMs in High Speed Applications

Static random access memory (SRAM) chips built with the bipolar IC process became practical for high-speed computer applications in the mid-1960s.

Scientific Data Systems and Signetics cooperated to produce an 8-bit RAM for the Sigma 7 scientific computer in 1965. That same year, IBM Components Division designed a 16-bit, system-protect memory array for the System 360 Model 95. In 1966, Transitron built a 16-bit scratchpad memory for the Honeywell Model 4200 minicomputer, which became the first widely second-sourced RAM.

With IBM’s first all-semiconductor memory machine, the System 370 Model 145 announced in October 1970, the company’s designs graduated to 64-bits for the cache memory and 128 bits for the main memory. In 1970, Fairchild built memory systems for the ILLIAC IV supercomputer using 256-bit chips.

Signetics/Scientific Data Systems 8-bit RAM

The April 4, 1966 issue of Electronics magazine featured an 8-bit RAM designed by Signetics for the SDS Sigma7 in the article, “Integrated scratch pads sire new generation of computers.”

View Artifact Detail
Fairchild Semiconductor 256-bit RAM

Fairchild engineers used 512 of these 256-bit chips in each of seventy processor element memory systems made for the Burroughs ILLIAC IV supercomputer in 1970-1971.

View Artifact Detail
Keywords
12
 
13
 
14
 
15
 
16
 
17
 
18
 
19
 
20
 
21
 
22
 
23
 
24
 
25
 
26
 
27