PDP-11/44
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| PDP-11/44 | |
 PDP-11/44 from a sales brochure. | |
| Manufacturer: | Digital Equipment Corporation |
|---|---|
| Architecture: | PDP-11 |
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).
Gallery
| v • d • ePDP-11 Computers and Peripherals |
|---|
| Unibus PDP-11s - PDP-11/20 • PDP-11/15 • PDP-11/35 • PDP-11/40 • PDP-11/45 • PDP-11/50 • PDP-11/55 • PDP-11/70 • PDP-11/05 • PDP-11/10 • PDP-11/34 • PDP-11/04 • PDP-11/44 • PDP-11/60 • PDP-11/24 • PDP-11/84 • PDP-11/94
Qbus PDP-11s - PDP-11/03 • PDP-11/23 • PDP-11/23+ • MicroPDP-11/73 • MicroPDP-11/53 • MicroPDP-11/83 • MicroPDP-11/93 Clones: CM 1420 Also: PDP-11 architecture • Qbus • Unibus • List of DEC board part numbers |
