Difference between revisions of "PDP-11/34A"
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The '''PDP-11/34A''' is the version of the [[PDP-11/34]] with the upgraded [[KD11-EA CPU|KD11-EA]] [[Central Processing Unit|CPU]] needed to supported the optional [[FP11-A Floating-Point Processor|FP11-A]] [[FP11 floating point|floating point]] unit and/or the [[KK11-A Cache Memory|KK11-A]] [[cache]]. | The '''PDP-11/34A''' is the version of the [[PDP-11/34]] with the upgraded [[KD11-EA CPU|KD11-EA]] [[Central Processing Unit|CPU]] needed to supported the optional [[FP11-A Floating-Point Processor|FP11-A]] [[FP11 floating point|floating point]] unit and/or the [[KK11-A Cache Memory|KK11-A]] [[cache]]. | ||
| − | A PDP-11/34 could be converted to a PDP-11/34A by simply replacing the two [[DEC card form factor|hex]] boards of the [[KD11-E CPU|KD11-E]] CPU. | + | A PDP-11/34 could be converted to a PDP-11/34A by simply replacing the two [[DEC card form factor|hex]] [[printed circuit board|boards]] of the [[KD11-E CPU|KD11-E]] CPU. Since the [[DD11-P backplane]] of the -11/34 was not modified, if the cache or floating point boards were added, it used a baroque system of special [[over the back|over the top]] (OTT) connectors to join up one or both to the rest of the CPU. |
{{semi-stub}} | {{semi-stub}} | ||
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| + | ==External links== | ||
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| + | * [https://www.pdp-11.nl/pdp11-34a/pdp11-34general.html PDP-11/34A Processor Overview] | ||
{{PDP-11}} | {{PDP-11}} | ||
[[Category: UNIBUS PDP-11s]] | [[Category: UNIBUS PDP-11s]] | ||
Revision as of 13:20, 19 April 2021
The PDP-11/34A is the version of the PDP-11/34 with the upgraded KD11-EA CPU needed to supported the optional FP11-A floating point unit and/or the KK11-A cache.
A PDP-11/34 could be converted to a PDP-11/34A by simply replacing the two hex boards of the KD11-E CPU. Since the DD11-P backplane of the -11/34 was not modified, if the cache or floating point boards were added, it used a baroque system of special over the top (OTT) connectors to join up one or both to the rest of the CPU.
External links
| v • d • e PDP-11 Computers and Peripherals |
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| UNIBUS PDP-11s - PDP-11/20 • PDP-11/15 • PDP-11/35 • PDP-11/40 • PDP-11/45 • PDP-11/50 • PDP-11/55 • PDP-11/70 PDP-11/05 • PDP-11/10 • PDP-11/04 • PDP-11/34 • PDP-11/60 • PDP-11/44 • PDP-11/24 • PDP-11/84 • PDP-11/94 QBUS PDP-11s - PDP-11/03 • PDP-11/23 • PDP-11/23+ • MicroPDP-11/73 • MicroPDP-11/53 • MicroPDP-11/83 • MicroPDP-11/93 QBUS CPUs: LSI-11 • LSI-11/2 • KDF11-A • KDF11-B • KDJ11-A • KDJ11-B • KDJ11-D • KDJ11-E Buses: UNIBUS • UNIBUS map • SPC • MUD • EUB • QBUS • CD interconnect • PMI Also: PDP-11 architecture • PDP-11 Extended Instruction Set • FP11 floating point • PDP-11 Memory Management |
| [Expand] |
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