DW780 Unibus Adapter - Revision history

Jnc: /* External links */ +VAX-11/780 Installation Manual, has section on DW780

2024-05-15T19:03:23Z

‎External links: +VAX-11/780 Installation Manual, has section on DW780

Jnc: /* External links */ Add doc in MAST

2024-05-15T12:39:54Z

‎External links: Add doc in MAST

Jnc: /* See also */ +RH780 Massbus Adapter

2024-05-14T14:19:34Z

‎See also: +RH780 Massbus Adapter

Jnc: Move to new subcat

2024-05-06T22:57:42Z

Move to new subcat

Jnc: Jnc moved page DW780 Unibus Adaptor to DW780 Unibus Adapter without leaving a redirect: typo

2022-01-07T00:01:13Z

Jnc moved page DW780 Unibus Adaptor to DW780 Unibus Adapter without leaving a redirect: typo

Jnc: syntax

2022-01-03T22:30:02Z

syntax

Jnc: Decent coverage

2022-01-03T13:15:34Z

Decent coverage

New page

The '''DW780 Unibus Adapter''' was a [[UNIBUS]] [[bus]] translator for the [[VAX-11/780]]'s [[Synchronous Backplane Interconnect]].

It was implemented on four [[DEC card form factor|hex]] cards:

* M8270 - UBA SBI Interface (USI)
* M8271 - UBA Control Board (UCB)
* M8272 - UBA Map and Data Path (UMD)
* M8273 - UNIBUS Address and Interrupt (UAI)

They mount in a custom 6-slot [[backplane]] (normally mounted next to the main [[Central Processing Unit|CPU]] backplane). 2 slots (on the back of the backplane) are used to hold i) a double-width M9044 UNIBUS [[terminator]], and ii) an M9042 paddle card, which carries the UNIBUS out on three [[flat cable]]s ([[DEC part number]] 70-133622-00), normally to an 'expansion I/O connector' on the side of the cabinet, and thence to a [[BA11-K mounting box]] mounted in an expansion cabinet. (There are some 'UNIBUS VAX' configurations where there is a [[DD11-C backplane|DD11-C]] or [[DD11-D backplane|DD11-D]] backplane in the main cabinet; in these, the flat cables run directly to an M9014 paddle card in the DD11. See pp. 15-16 and 65 of MP00539 for coverage of this configuration; see also chapter 12 of the 'VAX-11/780 Installation Manual'.)

{{semi-stub}}

==External links==

* [http://www.bitsavers.org/pdf/dec/vax/780/EK-DW780-TD-001_DW780_Unibus_Adapter_Technical_Description_197805.pdf DW780 Unibus Adapter Technical Description] (EK-DW780-TD-001)
* [http://www.bitsavers.org/pdf/dec/vax/780/MP00497_DW780_Dec77.pdf DW780 Field Maintenance Print Set] (MP-00497)

[[Category: VAXen]]
[[Category: UNIBUS]]

@@ Line 25: / Line 25: @@
 * [http://www.bitsavers.org/pdf/dec/vax/780/MP00497_DW780_Dec77.pdf DW780 Field Maintenance Print Set] (MP-00497)
 * [https://archive.org/details/digital_mast_1_10_5 Modular Approach to Systems Test] - contains a section on the DW780 (on pp. 22-37 of the PDF); includes detailed installation instructions
 [[Category: UNIBUS]]
 [[Category: SBI]]

@@ Line 15: / Line 15: @@
 |} -->
 {{semi-stub}}
 ==External links==
@@ Line 21: / Line 25: @@
 * [http://www.bitsavers.org/pdf/dec/vax/780/MP00497_DW780_Dec77.pdf DW780 Field Maintenance Print Set] (MP-00497)
 [[Category: UNIBUS]]

@@ Line 21: / Line 21: @@
 * [http://www.bitsavers.org/pdf/dec/vax/780/MP00497_DW780_Dec77.pdf DW780 Field Maintenance Print Set] (MP-00497)
-[[Category: VAXen]]
+[[Category: VAX Superminis]]
 [[Category: UNIBUS]]

← Older revision	Revision as of 00:01, 7 January 2022
(No difference)

@@ Line 8: / Line 8: @@
 * M8273 - UNIBUS Address and Interrupt (UAI)
-They mount in a custom 6-slot [[backplane]] (normally mounted next to the main [[Central Processing Unit|CPU]] backplane). 2 slots (on the back of the backplane) are used to hold i) a double-width M9044 UNIBUS [[terminator]], and ii) an M9042 paddle card, which carries the UNIBUS out on three [[flat cable]]s ([[DEC part number]] 70-133622-00), normally to an 'expansion I/O connector' on the side of the cabinet, and thence to a [[BA11-K mounting box]] mounted in an expansion cabinet. (There are some 'UNIBUS VAX' configurations where there is a [[DD11-C backplane|DD11-C]] or [[DD11-D backplane|DD11-D]] backplane in the main cabinet; in these, the flat cables run directly to an M9014 paddle card in the DD11. See pp. 15-16 and 65 of MP00539 for coverage of this configuration; see also chapter 12 of the 'VAX-11/780 Installation Manual'.)
+They mount in a custom 6-slot [[backplane]] (normally mounted next to the main [[Central Processing Unit|CPU]] backplane). 2 slots (on the back of the backplane) are used to hold double-width i) M9044 UNIBUS [[terminator]], and ii) an M9042 paddle card, which carries the UNIBUS out on three [[flat cable]]s ([[DEC part number]] 70-133622-00), normally to an 'expansion I/O connector' on the side of the cabinet, and thence to a [[BA11-K mounting box]] mounted in an expansion cabinet. (There are some 'UNIBUS VAX' configurations where there is a [[DD11-C backplane|DD11-C]] or [[DD11-D backplane|DD11-D]] backplane in the main cabinet; in these, the flat cables run directly to an M9014 paddle card in the DD11. See pp. 15-16 and 65 of MP00539 for coverage of this configuration; see also chapter 12 of the 'VAX-11/780 Installation Manual'.)
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