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This mini forum is intended to provide a simple means of discussion about the Honeywell DDP-516 computer. If you want to share your own experience or memories, or add relevant information about this system: post a message! For other purposes like sales messages, hardware & software questions or information requests, please use our main forum.

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Saturday 18th June 2016
Fokko de Jong (Netherlands)

Pjhilips bought the Honeywell DDP 416 and 516 and later DDP 316 as successors to the PR8000$ a 24 bit serial processor, used for industrial control purposes. The PR 8000 was developed in France Fontenay o Roses at Philips Research France and had an industial interface called UESI (Unité de Entree et Sortie Industrielle). This interface was adopted to work with the PR9200 series for industrial control purposes.
Besides industrial control, the P9200 series were used to process data from the Philips non-destructive X-ray material analysis equipment.

Saturday 31st October 2015
Ashley (Australia)

I have spoken of this machine many times over the years. I was in the RAF in 1976 at a Telemetry and Command Station.

Thursday 18th June 2015
Ian Spencer (Germany)
Spencer Family Web

I taught Series 16 at the Honeywell School in Hammersmith between 1970 and 1974 and then at the School in Cologne. The DDP-516 was a great machine.
I''ve written an Emulator the the H-112 (the 12 bit machine) and may extend it to series 16 one day.

Thursday 29th January 2015
Frank Abbing (Netherlands)

The DDp-516 was sold as P9200 by Philips. The DDP-416 was renamed
P9201. I worked as technician for Philips, was it 1969? One of my tasks
was to stick an aluminium panel with "Philips P9200" on it over the
Honeywell label.

Saturday 2nd November 2013
Pierre Mounier-Kuhn (France)

Does anyone know if the Honeywell DDP-516 was sold by Philips as a "P9200" for time-sharing? Or if it could (rather) be used as an teleprocessing interface for Philips mainframes ?
(See for example, p. 5 $it''s in Dutch but not too difficult to read$)
Many thanks to whoever may shed light on this question
Pierre Mounier-Kuhn

Friday 13rd April 2012
Brian Rees (Switzerland)

I started with Honeywell in England in 1969 with a 3 month programming course and then remained with the UK company for 3 years before joining Honeywell Bull in Switzerland where I stayed for 3 years too. The 16 bit machines were a delight with much of the donkey work being done in software because hardware was so expensive back then. The typical machine had 4k memory with an ASR. The operating systems were small and fast for their time, the drivers simple but effective. I would live to see an instruction set pamphlet again.

Wednesday 12th October 2011
Allan (Philadelphia USA)

Nostalgia! I worked on the 516 from about 76 til 80 - happy memories of the octal keyin loader$
77000, run, start - paper tape boot with the HISI hard drive. The teletype sounded like a dozen typists.

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