Contents
- 1 Which type of computer is PDP-11?
- 2 Who invented PDP-11?
- 3 When was PDP-11 invented?
- 4 What is the maximum physical address on a PDP 11?
- 5 What was the PDP-8 used for?
- 6 What kind of network was the PDP-11 used in?
- 7 Are there any specific instructions for the PDP-11?
- 8 What was the successor to the PDP-11?
Which type of computer is PDP-11?
Minicomputer
PDP-11
| A PDP-11/40 CPU is at the bottom, with a TU56 dual DECtape drive installed above it. | |
|---|---|
| Product family | Programmed Data Processor |
| Type | Minicomputer |
| Release date | 1970 |
| Units sold | around 600,000 |
Who invented PDP-11?
Digital Equipment Corporation
PDP-11/Manufacturers
It seems however that the designed by de Castro PDP-X has little relationship to DEC’s eventual 16-bit architecture, the PDP-11. Gordon Bell, the vice president of research in DEC, was involved with recommending what became the PDP-11, while the actual design was made by Harold McFarland.
How many physical 4 byte words are there on a PDP-11?
The PDP-11/70 uses 22 bits for addressing physical memory. This represents a total of 222 (over 4 million) byte locations.
When was PDP-11 invented?
1970
Five years later its PDP-8 cost \$18,000 and became the first widely used minicomputer, with more than 50,000 sold. The DEC PDP-11, introduced in 1970, came in a variety of models, small and cheap…
What is the maximum physical address on a PDP 11?
The physical address space was extended to 18 or 22 bits, hence allowing up to 256 KB or 4 MB of RAM.
What is the meaning of PDP 8?
The PDP-8 is a 12-bit minicomputer that was produced by Digital Equipment Corporation (DEC). It was the first commercially successful minicomputer, with over 50,000 units being sold over the model’s lifetime.
What was the PDP-8 used for?
The PDP-8 was designed in part to handle contemporary telecommunications and text. Six-bit character codes were in widespread use at the time, and the PDP-8’s twelve-bit words can efficiently store two such characters.
What kind of network was the PDP-11 used in?
One of the predecessors of Alcatel-Lucent, the Bell Telephone Manufacturing Company, developed the BTMC DPS-1500 packet-switching ( X.25) network and used PDP-11s in the regional and national network management system, with the Unibus directly connected to the DPS-1500 hardware.
How many PDP-11 minicomputers have been sold?
In total, around 600,000 PDP-11s of all models were sold, making it one of DEC’s most successful product lines. The PDP-11 is considered by some experts to be the most popular minicomputer.
Are there any specific instructions for the PDP-11?
There are no specific input or output instructions; the PDP-11 uses memory-mapped I/O and so the same move instruction is used; orthogonality even enables moving data directly from an input device to an output device. More complex instructions such as add likewise can have memory, register, input, or output as source or destination.
What was the successor to the PDP-11?
DEC’s 32-bit successor to the PDP-11, the VAX (for “Virtual Address eXtension”) overcame the 16-bit limitation, but was initially a superminicomputer aimed at the high-end time-sharing market.