The PDP-9, which is "two metres wide and about 75cm deep," [4] is approximately twice the speed of the PDP-7. It was built using discrete transistors, and has an optional integrated vector graphics terminal. The PDP-9 has a memory cycle time of 1 microsecond, and weighs about 750 pounds (340 kg).

The PDP-9 was DEC's fourth 18-bit computer, and the first DEC CPU to use microcode. A little over 400 were built. It was basically a re-implementation of the PDP-7 (built out of System Modules) in FLIP CHIPs; the PDP-9 'Basic Software System' manual indicates that most PDP-7 software will run, un-modified.

pdp-9是“两米宽，深约75厘米”，大约是pdp-7速度的两倍。 它是使用离散晶体管构建的，并具有可选的集成 向量图形 终端。 PDP-9的内存周期时间为1微秒，重约750磅（340千克）。

While there were some differences, one of the PDP-9 system utilities would convert PDP-7 programs to run on the PDP-9. Input was by paper or magnetic tape. This system was purchased by Max Levy Autograph in October 1968 and shipped to Concord Controls who designed and built the controller for the 60" photo-plotter.

2005年11月19日 · PDP-9, an 18-bit computer, was released. It was about twice as fast as the PDP-7. Later in the year the PDP-9/L (a more compact PDP-9) was released and eventually 40 were sold.

2002年2月6日 · [This] is a hardware bootstrap loader for the PDP-9. Made by Tennecomp with a 19 inch rack form factor. It has a large black motor, which is activated by pressing the button on the front panel. The motor rotates a studded drum, 18 studs wide, and 60 positions long, using 53 of them. Like one of those music boxes.

The PDP-9, the fourth of the five 18-bit minicomputers produced by Digital Equipment Corporation, was introduced in 1966. A total of 445 PDP-9 systems were prod...

DEC built five 18b computer systems: the PDP-1, PDP-4, PDP-7, PDP-9, and PDP-15. This paper documents the architectural changes that occurred over the lifetime of the 18b systems and analyses the benefits and tradeoffs of the changes made.

The PDP-9 was a very popular, eighteen bit computer, with a cycle time of one microsecond. Over 430 were sold world-wide. Sites in Australia included Government Aircraft Factory, Australian Iron and Steel, Melbourne University Physics Dept, Latrobe …

El PDP-9, que tiene "dos metros de ancho y unos 75 cm de profundidad" es aproximadamente el doble de la velocidad del PDP-7. Fue construido utilizando transistores discretos y tiene un terminal de gráficos vectoriales integrado opcional.