Difference between revisions of "PDP-8/A"
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| image = PDP 8 e Trondheim.jpg | | image = PDP 8 e Trondheim.jpg | ||
| caption = PDP-8/E front panel | | caption = PDP-8/E front panel | ||
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| + | | manufacturer = [[Digital Equipment Corporation|DEC]] | ||
| + | | architecture = [[PDP-8 architecture|PDP-8]] | ||
| year introduced = 1976 | | year introduced = 1976 | ||
| form factor = [[minicomputer]] | | form factor = [[minicomputer]] | ||
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| design type = [[clock]]ed random [[logic]] | | design type = [[clock]]ed random [[logic]] | ||
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| − | | clock speed = | + | | clock speed = 666KHz |
| − | | memory speed = | + | <!-- |
| + | | ram = Maximum of 32 kwords in eight 4 kword banks | ||
| + | --> | ||
| + | | memory speed = 2.3 µseconds | ||
| bus arch = [[OMNIBUS]] | | bus arch = [[OMNIBUS]] | ||
| memory mgmt = bank selection, CPU mode | | memory mgmt = bank selection, CPU mode | ||
| operating system = [[OS/8]], [[TSS/8]] | | operating system = [[OS/8]], [[TSS/8]] | ||
| predecessor = [[PDP-8/E]] | | predecessor = [[PDP-8/E]] | ||
| − | + | | successor = None | |
| − | | successor = | + | | price = US$2.6K (CPU and 4KW memory) |
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}} | }} | ||
Revision as of 02:12, 28 January 2019
| PDP-8/A | |
| Manufacturer: | DEC |
|---|---|
| Architecture: | PDP-8 |
| Year Introduced: | 1976 |
| Form Factor: | minicomputer |
| Word Size: | 12 |
| Logic Type: | TTL |
| Clock Speed: | 666KHz |
| Memory Speed: | 2.3 µseconds |
| Physical Address Size: | 32KW (requires optional KM8-A) |
| Virtual Address Size: | 4KW |
| Memory Management: | bank selection, CPU mode |
| Bus Architecture: | OMNIBUS |
| Operating System: | OS/8, TSS/8 |
| Predecessor(s): | PDP-8/E |
| Successor(s): | None |
| Price: | US$2.6K (CPU and 4KW memory) |
The PDP-8/A was DEC's last non-microprocessor PDP-8. The KK8-A CPU was a single hex board, which plugged into an OMNIBUS backplane. It supported both core main memory (MM8-AA and MM8-AB) and semiconductor (MS8-A).
There were a number of options available for use with the -8/A, including:
- KM8-A Extended Option - main memory extension and time-sharing control, etc
- FPP8/A Floating Point Processor
- DKC8-AA - front panel control, real-time clock, asynchronous serial line interface, etc
The -8/A could use either an Operator's Panel, or a Programmer's Panel (similar to the KY11-LB); the latter required the DKC8-AA.
The -8/A came either as a kit of boards, or as a complete system including a chassis, power supply and backplane; in the latter form, there was a list of different configurations.
| v • d • e PDP-8 Computers, Software and Peripherals |
|---|
| PDP-8s: PDP-5 • PDP-8 • LINC-8 • PDP-8/S • PDP-8/I • PDP-8/L • PDP-12 • PDP-8/E • PDP-8/F • PDP-8/M • PDP-8/A
Workstations: VT78 Also: PDP-8 family • PDP-8 architecture • PDP-8 Memory Extension units |
