Difference between revisions of "PDP-8/A"

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{{Infobox Machine  
{{Infobox Machine  
| name = PDP-8/A
| name = PDP-8/A
| image = PDP-8'A-400.jpg
| image = PDP 8 e Trondheim.jpg
| caption = PDP-8/A-400
| caption = PDP-8/E front panel
| manufacturer = [[Digital Equipment Corporation|DEC]]
| manufacturer = [[Digital Equipment Corporation|DEC]]
| architecture = [[PDP-8 architecture|PDP-8]]
| architecture = [[PDP-8 architecture|PDP-8]]

Revision as of 16:00, 9 January 2021

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. 4KW memory, Operator's Panel)

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:

The -8/A could use either an Operator's Panel, or a KC8-AA 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.

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