• Source: DDP-24

The 24.3/info/ddp" target="_blank">DDP-24 (1963) was a 24-bit computer designed and built by the Computer Control Company, aka 3C, located in Framingham, Massachusetts. In 1966 the company was sold to Honeywell who continued the 24.3/info/ddp" target="_blank">DDP line into the 1970s.




Hardware


The 24.3/info/ddp" target="_blank">DDP-24 was completely transistorized and used magnetic-core memory to store data and program instructions. It had a sign magnitude code to represent positive or negative numbers and used binary logic. The 24.3/info/ddp" target="_blank">DDP-24 used a single address command format and single operation with index and indirect addressing flags.




Market acceptance


The 24.3/info/ddp" target="_blank">DDP-24 found use in space and flight simulators of the mid-1960s and other real-time scientific data processing applications.
Peter B. Denes, a researcher at Bell Telephone Laboratories, Inc., installed a 24.3/info/ddp" target="_blank">DDP-224 system around 1965 for use in speech research. It and a 24.3/info/ddp" target="_blank">DDP-24 were used by Max Mathews, considered by many to be the founding father of computer music, to develop his GROOVE music system, as related by Professor Barry Vercoe in a 1999 MIT Media Lab interview. When asked to describe the first MIT experimental music studio, Prof. Vercoe replied, "We began that work when I first arrived in 1971. The first studio we had was in the basement of Building 26, where we had a computer given to MIT by Max Mathews--the Honeywell 24.3/info/ddp" target="_blank">DDP-24. Max initially developed his GROOVE system on this machine and was kind enough to give it to MIT when I joined the faculty." The 3C 24.3/info/ddp" target="_blank">DDP-24 used modules or cards called S-Pac's. These S-Pac cards could be Flip-Flops, NAND gates, Bit Registers etc. and were housed in a 24.3/info/ddp" target="_blank">DDP-24 S-Bloc card rack. An early raster-scan graphics display was developed for the computer system.




External links & Bibliography


24.3/info/ddp" target="_blank">DDP-24 Instruction Manual, August 64, PDF
BRL REPORT NO. 1227 JANUARY 1964
Adams Report 1967, PDF
"Oral History of John William (Bill) Poduska" (PDF).




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