Difference between revisions of "PDP-11/44"

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| architecture = [[PDP-11]]
 
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[[Image:PDP11-44-geerol.jpg|150px|thumb|right|A PDP-11/44 setup.]]
 
[[Image:PDP11-44-geerol.jpg|150px|thumb|right|A PDP-11/44 setup.]]
  
 
== xs4all.nl ==
 
== xs4all.nl ==
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Quoting [http://www.xs4all.nl/~geerol/en/GAL/index.html http://www.xs4all.nl/~geerol/en/GAL/index.html]
 
Quoting [http://www.xs4all.nl/~geerol/en/GAL/index.html http://www.xs4all.nl/~geerol/en/GAL/index.html]
 
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The machine also had an almost-FEP (front-end processor) console, based on the Intel i8088, running from PROM. There was no qbus equivalent.
 
The machine also had an almost-FEP (front-end processor) console, based on the Intel i8088, running from PROM. There was no qbus equivalent.
  
Trivia: This was the last non-microprocessor-based PDP-11 (it used LSI bitslice processors).</i>
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Trivia: This was the last non-[[microprocessor]]-based PDP-11 (it used LSI bitslice processors).</i>
  
== Gallery ==
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[[Category:UNIBUS processors]]
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[[Category:UNIBUS PDP-11s]]

Revision as of 15:46, 17 February 2018


PDP-11/44
Pdp11 44.jpg
PDP-11/44 from a sales brochure.
Manufacturer: Digital Equipment Corporation
Architecture: PDP-11


A PDP-11/44 setup.

xs4all.nl

Quoting http://www.xs4all.nl/~geerol/en/GAL/index.html (1979) The PDP 11/44 (hostname "gigant") is a low-cost successor of the PDP 11/70. The 11/70, brought to the market in 1975, was the first "large" PDP. Large means a 22 bit address space and a memory limit of 4MB. Do keep in mind that user programs are still limited to 16 bit addressing and hence restricted to a limit of just 2x 64KB, when using separated I&D.

The cost of a new 11/44 has been about half of the listprice of an 11/70. The PDP 11/44 had no Massbus like the /70 has, so it was not possible to use diskdrives with a transfer rate too high.

hampage.hu

Quoting: 1979. A middle-class -11. It had the 22-bit UNIBUS map and MMU as standard (up to 2 Mwords on a separate CPU-memory interconnect, called the PAX Memory Bus). The CPU consists of 5 boards, plus one for the FPP (FP11-F, optional), and two CIS (KE44-A, optional). Features: 8 KByte cache, ODT, 2 SLU's (Serial Line Units: console + TU58 console media), RTC (Real-Time Clock), kernel/supervisor/user modes.

The machine also had an almost-FEP (front-end processor) console, based on the Intel i8088, running from PROM. There was no qbus equivalent.

Trivia: This was the last non-microprocessor-based PDP-11 (it used LSI bitslice processors).