Difference between revisions of "PDP-5"
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| − | + | The '''PDP-5''' was [[Digital Equipment Corporation|DEC]]'s first 12-bit computer, the predecessor to the [[PDP-8]]. Like the -8, it was a [[load-store architecture]]. A memory extension unit was added later, to support [[bank switching]], and thus allow the use of more than 4KW of [[main memory]]. | |
| − | {{stub}} | + | It was built out of the standard modules created for the [[PDP-4]]. It was built using the [[bit-slice]] concept, where one bit of all the [[register]]s and the [[data path]]s between them was implemented on a single [[printed circuit board|PCB]]; a number of these boards (equal to the [[word]] length of the machine) formed the [[Central Processing Unit|CPU]]. To minimize the initial cost, it had an [[input/output|I/O]] [[bus]], rather than the radial links from the CPU to individual [[peripheral]]s used in all earlier DEC machines, such as the 18-bit machines like the [[PDP-1]]. |
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==External links== | ==External links== | ||
| + | * [http://www.bitsavers.org/pdf/dec/pdp5/ PDP-5] - ducumentation at [[Bitsavers]] | ||
* [https://gordonbell.azurewebsites.net/Digital/PDP%205%20Manual%201964.pdf PDP-5 Manual] | * [https://gordonbell.azurewebsites.net/Digital/PDP%205%20Manual%201964.pdf PDP-5 Manual] | ||
| − | * C. Gordon Bell and John E. McNamara, [http://gordonbell.azurewebsites.net/Computer_Engineering/00000200.htm The PDP-8 and Other 12-Bit Computers], in C. Gordon Bell, J. Craig Mudge, John. E. McNamara, ''Computer Engineering: A DEC View of Hardware Systems Design'', Digital Press, Bedford, 1978 | + | * [[C. Gordon Bell]] and John E. McNamara, [http://gordonbell.azurewebsites.net/Computer_Engineering/00000200.htm The PDP-8 and Other 12-Bit Computers], in C. Gordon Bell, J. Craig Mudge, John. E. McNamara, ''Computer Engineering: A DEC View of Hardware Systems Design'', Digital Press, Bedford, 1978 |
{{Nav DEC}} | {{Nav DEC}} | ||
[[Category: DEC Systems]] | [[Category: DEC Systems]] | ||
Revision as of 20:14, 7 August 2022
The PDP-5 was DEC's first 12-bit computer, the predecessor to the PDP-8. Like the -8, it was a load-store architecture. A memory extension unit was added later, to support bank switching, and thus allow the use of more than 4KW of main memory.
It was built out of the standard modules created for the PDP-4. It was built using the bit-slice concept, where one bit of all the registers and the data paths between them was implemented on a single PCB; a number of these boards (equal to the word length of the machine) formed the CPU. To minimize the initial cost, it had an I/O bus, rather than the radial links from the CPU to individual peripherals used in all earlier DEC machines, such as the 18-bit machines like the PDP-1.
External links
- PDP-5 - ducumentation at Bitsavers
- PDP-5 Manual
- C. Gordon Bell and John E. McNamara, The PDP-8 and Other 12-Bit Computers, in C. Gordon Bell, J. Craig Mudge, John. E. McNamara, Computer Engineering: A DEC View of Hardware Systems Design, Digital Press, Bedford, 1978
| v • d • e Digital Equipment Corporation |
|---|
| 18-bit machines - PDP-1 • PDP-4 • PDP-7 • PDP-9 • PDP-15
12-bit machines - PDP-5 • PDP-8 • LINC-8 • PDP-12 36-bit machines - PDP-3 • PDP-6 • PDP-10 16-/32-/64-bit machines - PDP-11 • VAX • MIPS • Alpha Also: Buses • Peripherals • Part numbers • Engineering drawings |
