Difference between revisions of "PDP-9"
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| logic type = PNP [[Transistor]] [[FLIP CHIP]]s | | logic type = PNP [[Transistor]] [[FLIP CHIP]]s | ||
| design type = [[microcode]]d | | design type = [[microcode]]d | ||
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| memory speed = 1 μsec | | memory speed = 1 μsec | ||
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| − | The '''PDP-9''' was [[Digital Equipment Corporation|DEC]]'s | + | The '''PDP-9''' was [[Digital Equipment Corporation|DEC]]'s fourth 18-bit computer, and the first DEC [[Central Processing Unit|CPU]] to use [[microcode]]. A little over 400 were built. |
Its principal intended use was for [[real-time system]]s, including data recording and process control. A variety of models were offered; the basic system provided 8K words of [[core memory]], and the PDP-9/L was a cost-reduced system with cheaper peripherals and 4KW of memory. | Its principal intended use was for [[real-time system]]s, including data recording and process control. A variety of models were offered; the basic system provided 8K words of [[core memory]], and the PDP-9/L was a cost-reduced system with cheaper peripherals and 4KW of memory. | ||
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[[Instruction]]s had a 4-bit opcode, 1 bit of indirect, and 13 bits of address. It was a [[load-store architecture]], with a single [[accumulator]]. Multiply/divide was a hardware option, the KE09A, which also performed shifting. | [[Instruction]]s had a 4-bit opcode, 1 bit of indirect, and 13 bits of address. It was a [[load-store architecture]], with a single [[accumulator]]. Multiply/divide was a hardware option, the KE09A, which also performed shifting. | ||
| − | Use of more than 8KW of [[main memory]] required the Memory Extension Control, KG09A. A memory | + | Use of more than 8KW of [[main memory]] required the Memory Extension Control, KG09A. A memory management option, the KX09A, which included a boundary register to set the boundary between protected and un-protected memory, and two modes for the CPU, was also available. |
A large range of peripherals were available, including [[DECtape]] (via the TC02 controller), [[magnetic tape]] (via the TC59), [[drum]] (RM09 controller) and [[fixed-head disk]] (RB09). | A large range of peripherals were available, including [[DECtape]] (via the TC02 controller), [[magnetic tape]] (via the TC59), [[drum]] (RM09 controller) and [[fixed-head disk]] (RB09). | ||
Revision as of 01:08, 8 November 2017
| PDP-9 | |
| Manufacturer: | Digital Equipment Corporation |
|---|---|
| Year First Shipped: | 1966 |
| Form Factor: | minicomputer |
| Word Size: | 18 bits |
| Logic Type: | PNP Transistor FLIP CHIPs |
| Design Type: | microcoded |
| Memory Speed: | 1 μsec |
| Physical Address Size: | 15 bits (32K words) |
| Virtual Address Size: | 13 bits (direct), 15 bits (extended) |
| Memory Management: | bounds register |
| Predecessor(s): | PDP-7 |
| Successor(s): | PDP-15 |
| Price: | US$30K (8KW system) |
The PDP-9 was DEC's fourth 18-bit computer, and the first DEC CPU to use microcode. A little over 400 were built.
Its principal intended use was for real-time systems, including data recording and process control. A variety of models were offered; the basic system provided 8K words of core memory, and the PDP-9/L was a cost-reduced system with cheaper peripherals and 4KW of memory.
Instructions had a 4-bit opcode, 1 bit of indirect, and 13 bits of address. It was a load-store architecture, with a single accumulator. Multiply/divide was a hardware option, the KE09A, which also performed shifting.
Use of more than 8KW of main memory required the Memory Extension Control, KG09A. A memory management option, the KX09A, which included a boundary register to set the boundary between protected and un-protected memory, and two modes for the CPU, was also available.
A large range of peripherals were available, including DECtape (via the TC02 controller), magnetic tape (via the TC59), drum (RM09 controller) and fixed-head disk (RB09).
Further Reading
(All available online through BitSavers.)
- "PDP-9 User Handbook"
