DDP-24

The company then built the DDP-224 (1965), which was followed by the DDP-124 (1966, integrated circuit) One of the developers of the DDP-124, William Poduska, who later on became one of the founders of Prime Computer, said in a 2002 interview that the 124 came after the 224, which came after the 24. The 24, 224, 124 sequence is confirmed in {{cite web |url=http://www.ddp116.org/products/ddp124/ddp124.pdf Prior to CCC's 1966 acquisition by Honeywell, Computer Control Corporation also built the 16-bit DDP-116 (1965).

Hardware

The 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 DDP-24 used a single address command format and single operation with index and indirect addressing flags.

Market acceptance

The 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 DDP-224 system around 1965 for use in speech research. It and a 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 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 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 DDP-24 S-Bloc card rack. An early raster-scan graphics display was developed for the computer system.

References

References

1. [http://ed-thelen.org/comp-hist/AdamsReport1967Q4-1968Q1.pdf Adams Report 1967, PDF]
2. [http://ed-thelen.org/comp-hist/BRL64-c.html#CCC-DDP-24 BRL REPORT NO. 1227 JANUARY 1964]
3. [http://www.bitsavers.org/pdf/computerControlCompany/ddp-24/DDP-24_InstructionMan_Aug64.pdf DDP-24 Instruction Manual, August 64, PDF]
4. Kenneth Flamm's 2010 book, {{ISBN. 0815707215, named "Creating the Computer"
5. Zhou, Yong. (2014-05-23). "The European Computer Users Handbook 1968/69: Pergamon Computer Data Series". Elsevier.
6. Denes, Peter B., "Real-Time Speech Research," Proc. Symposium on the Human Use of Computing Machines, Bell Telephone Laboratories, June 1966, pp. 15-23.
7. [http://www.media.mit.edu/events/EMS/bv-interview.html 1999 MIT Media Lab interview with Professor Barry Vercoe]
8. [http://www.p3oriontopsecret.com/3c-computer-control-company-ddp-24-card-rack.html 3C Computer Control Company DDP-24 Card Rack circa 1964]
9. Noll, A. Michael, "Scanned-Display Computer Graphics," Communications of the ACM, Vol. 14, No. 3, (March 1971), pp. 145-150.